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Document and Entity Information - shares	9 Months Ended
Document and Entity Information - shares	Jun. 30, 2018	Aug. 01, 2018
Document and Entity Information
Entity Registrant Name	AECOM
Entity Central Index Key	0000868857
Document Type	10-Q
Document Period End Date	Jun. 30, 2018
Amendment Flag	false
Current Fiscal Year End Date	--09-30
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		160,780,324
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3

Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
CURRENT ASSETS:
Cash and cash equivalents	$ 628,321	$ 665,871
Cash in consolidated joint ventures	173,098	136,491
Total cash and cash equivalents	801,419	802,362
Accounts receivable-net	5,447,985	5,127,743
Prepaid expenses and other current assets	651,816	696,718
Current assets held for sale	63,303
Income taxes receivable	79,319	55,399
TOTAL CURRENT ASSETS	7,043,842	6,682,222
PROPERTY AND EQUIPMENT-NET	607,151	621,357
DEFERRED TAX ASSETS-NET	181,564	171,331
INVESTMENTS IN UNCONSOLIDATED JOINT VENTURES	398,134	364,223
GOODWILL	5,928,029	5,992,881
INTANGIBLE ASSETS-NET	343,185	415,096
OTHER NON-CURRENT ASSETS	225,512	149,846
TOTAL ASSETS	14,727,417	14,396,956
CURRENT LIABILITIES:
Short-term debt	47,402	1,221
Accounts payable	2,517,234	2,249,872
Accrued expenses and other current liabilities	2,184,672	2,245,519
Income taxes payable	28,493	38,176
Billings in excess of costs on uncompleted contracts	968,778	902,812
Current liabilities held for sale	17,914
Current portion of long-term debt	125,577	140,779
TOTAL CURRENT LIABILITIES	5,890,070	5,578,379
OTHER LONG-TERM LIABILITIES	340,116	322,199
DEFERRED TAX LIABILITY-NET	14,354	20,515
PENSION BENEFIT OBLIGATIONS	515,450	559,068
LONG-TERM DEBT	3,707,293	3,702,109
TOTAL LIABILITIES	10,467,283	10,182,270
COMMITMENTS AND CONTINGENCIES (Note 14)
AECOM STOCKHOLDERS' EQUITY:
Common stock-authorized, 300,000,000 shares of $0.01 par value as of June 30, 2018 and September 30, 2017; issued and outstanding 160,693,918 and 157,529,419 shares as of June 30, 2018 and September 30, 2017, respectively	1,607	1,575
Additional paid-in capital	3,820,281	3,733,572
Accumulated other comprehensive loss	(758,287)	(700,661)
Retained earnings	1,014,131	961,640
TOTAL AECOM STOCKHOLDERS' EQUITY	4,077,732	3,996,126
Noncontrolling interests	182,402	218,560
TOTAL STOCKHOLDERS' EQUITY	4,260,134	4,214,686
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 14,727,417	$ 14,396,956

Consolidated Balance Sheets (Parenthetical) - $ / shares	Jun. 30, 2018	Sep. 30, 2017
Consolidated Balance Sheets
Common stock, authorized shares	300,000,000	300,000,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, issued shares	160,693,918	157,529,419
Common stock, outstanding shares	160,693,918	157,529,419

Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Consolidated Statements of Operations
Revenue	$ 5,147,920	$ 4,561,467	$ 14,849,662	$ 13,347,014
Cost of revenue	4,962,741	4,386,291	14,387,059	12,833,421
Gross profit	185,179	175,176	462,603	513,593
Equity in earnings of joint ventures	12,863	66,458	55,621	109,667
General and administrative expenses	(35,159)	(33,944)	(100,046)	(96,427)
Impairment of assets held for sale, including goodwill			(168,178)
Acquisition and integration expense				(35,409)
(Loss) gain on disposal activities	(2,149)		(2,149)	572
Income from operations	160,734	207,690	247,851	491,996
Other income	2,752	2,136	17,542	4,237
Interest expense	(55,213)	(61,547)	(211,955)	(176,985)
Income before income tax expense (benefit)	108,273	148,279	53,438	319,248
Income tax expense (benefit)	33,131	12,205	(38,362)	1,556
Net income	75,142	136,074	91,800	317,692
Noncontrolling interests in income of consolidated subsidiaries, net of tax	(14,232)	(34,747)	(39,309)	(66,790)
Net income attributable to AECOM	$ 60,910	$ 101,327	$ 52,491	$ 250,902
Net income attributable to AECOM per share:
Basic (in dollars per share)	$ 0.38	$ 0.65	$ 0.33	$ 1.62
Diluted (in dollars per share)	$ 0.37	$ 0.64	$ 0.32	$ 1.58
Weighted average shares outstanding:
Basic (in shares)	160,395	155,763	159,266	155,128
Diluted (in shares)	163,213	158,820	162,426	158,488

Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Consolidated Statements of Comprehensive Income
Net income	$ 75,142	$ 136,074	$ 91,800	$ 317,692
Other comprehensive (loss) income, net of tax:
Net unrealized gain (loss) on derivatives, net of tax	626	563	(214)	4,263
Foreign currency translation adjustments	(67,255)	46,203	(57,742)	13,164
Pension adjustments, net of tax	15,188	(6,562)	1,553	8,866
Other comprehensive (loss) income, net of tax	(51,441)	40,204	(56,403)	26,293
Comprehensive income, net of tax	23,701	176,278	35,397	343,985
Noncontrolling interests in comprehensive income of consolidated subsidiaries, net of tax	(14,078)	(35,032)	(40,532)	(67,160)
Comprehensive income (loss) attributable to AECOM, net of tax	$ 9,623	$ 141,246	$ (5,135)	$ 276,825

Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 91,800	$ 317,692
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	200,141	205,978
Equity in earnings of unconsolidated joint ventures	(55,621)	(109,667)
Distribution of earnings from unconsolidated joint ventures	86,367	110,934
Non-cash stock compensation	54,341	58,674
Prepayment premium on redemption of unsecured senior notes	34,504
Impairment of assets held for sale, including goodwill	168,178
Foreign currency translation	(49,687)	(1,058)
Write-off of debt issuance costs	7,048
Loss (gain) on disposal activities	2,149	(572)
Other	115	(8,027)
Changes in operating assets and liabilities, net of effects of acquisitions:
Accounts receivable	(365,608)	(146,912)
Prepaid expenses and other assets	(32,375)	(108,214)
Accounts payable	258,349	264,698
Accrued expenses and other current liabilities	(94,533)	(159,766)
Billings in excess of costs on uncompleted contracts	41,662	108,119
Other long-term liabilities	(104,163)	(86,522)
Net cash provided by operating activities	242,667	445,357
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds (payments) related to business acquisitions	2,203	(1,733)
Cash acquired from consolidation of joint venture	7,630
Proceeds from disposal of businesses, net of cash disposed	19,537	2,200
Investment in unconsolidated joint ventures	(75,992)	(44,882)
Return of investment in unconsolidated joint ventures	12,700	34,087
Proceeds from sales of investments	2,738	700
Payments for purchase of investments	(20,240)
Proceeds from disposal of property and equipment	23,124	6,178
Payments for capital expenditures	(88,754)	(64,677)
Net cash used in investing activities	(117,054)	(68,127)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings under credit agreements	7,439,180	4,638,662
Repayments of borrowings under credit agreements	(6,654,873)	(5,635,212)
Proceeds from issuance of unsecured senior notes		1,000,000
Redemption of unsecured senior notes	(800,000)	(179,208)
Prepayment premium on redemption of unsecured senior notes	(34,504)
Cash paid for debt issuance costs	(10,708)	(13,041)
Proceeds from issuance of common stock	27,300	24,717
Proceeds from exercise of stock options	3,200	3,679
Payments to repurchase common stock	(29,342)	(22,332)
Net distributions to noncontrolling interests	(72,736)	(44,603)
Other financing activities	8,702	(29,421)
Net cash used in financing activities	(123,781)	(256,759)
EFFECT OF EXCHANGE RATE CHANGES ON CASH	(2,775)	(157)
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(943)	120,314
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	802,362	692,145
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 801,419	$ 812,459

Basis of Presentation	9 Months Ended
Basis of Presentation	Jun. 30, 2018
Basis of Presentation
Basis of Presentation	1.Basis of Presentation The accompanying consolidated financial statements of AECOM (the Company) are unaudited and, in the opinion of management, include all adjustments, including all normal recurring items necessary for a fair statement of the Company’s financial position and results of operations for the periods presented. All intercompany balances and transactions are eliminated in consolidation. The consolidated financial statements should be read in conjunction with the consolidated financial statements and notes thereto included in the Company’s Form 10-K for the fiscal year ended September 30, 2017 (the Annual Report). The accompanying unaudited consolidated financial statements and related notes have been prepared in accordance with generally accepted accounting principles (GAAP) in the United States (U.S.) for interim financial information and with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete financial statements. The consolidated financial statements included in this report have been prepared consistently with the accounting policies described in the Annual Report and should be read together with the Annual Report. The results of operations for the three and nine months ended June 30, 2018 are not necessarily indicative of the results to be expected for the fiscal year ending September 30, 2018. The Company reports its annual results of operations based on 52 or 53-week periods ending on the Friday nearest September 30. The Company reports its quarterly results of operations based on periods ending on the Friday nearest December 31, March 31, and June 30. For clarity of presentation, all periods are presented as if the periods ended on September 30, December 31, March 31, and June 30.

New Accounting Pronouncements and Changes in Accounting	9 Months Ended
New Accounting Pronouncements and Changes in Accounting	Jun. 30, 2018
New Accounting Pronouncements and Changes in Accounting
New Accounting Pronouncements and Changes in Accounting	2.New Accounting Pronouncements and Changes in Accounting In May 2014, the Financial Accounting Standards Board (FASB) issued new accounting guidance which amended the existing accounting standards for revenue recognition. The new accounting guidance establishes principles for recognizing revenue upon the transfer of promised goods or services to customers, in an amount that reflects the expected consideration received in exchange for those goods or services. The amendments may be applied retrospectively to each prior period presented or retrospectively with the cumulative effect recognized as of the date of initial application. The Company continues to evaluate the impact of the new guidance on its consolidated financial statements, including the expected impact on its business processes, systems, and controls, and potential differences in the timing or method of revenue recognition for its contracts. The Company will adopt the new standard on October 1, 2018, using the modified retrospective method, which requires recognizing the net cumulative effects of adoption as an adjustment to retained earnings. Based on its initial evaluation, the Company expects the impacts of adoption to be primarily related to combining contracts that were previously segmented into a single performance obligation. In February 2016, the FASB issued new accounting guidance which changes accounting requirements for leases. The new guidance requires lessees to recognize the assets and liabilities arising from all leases, including those classified as operating leases under previous accounting guidance, on the balance sheet. It also requires disclosure of key information about leasing arrangements to increase transparency and comparability among organizations. The new guidance will be effective for the Company’s fiscal year beginning October 1, 2019 with early adoption permitted. The new guidance must be adopted using a modified retrospective transition approach and provides for some practical expedients. The Company is currently evaluating the impact that the new guidance will have on its consolidated financial statements. In February 2016, the FASB issued new accounting guidance to clarify that a change in the counterparty to a derivative instrument that has been designated as a hedging instrument under previous guidance does not, in and of itself, require redesignation of that hedging relationship provided that all other hedge accounting criteria continue to be met. The Company adopted the new guidance on October 1, 2017; and the adoption of this guidance did not have a material impact on the Company’s consolidated financial statements. In March 2016, the FASB issued new accounting guidance which eliminates the requirement to apply the equity method of accounting retrospectively when a reporting entity obtains significant influence over a previously held investment. The Company adopted the new guidance on October 1, 2017; and the adoption of this guidance did not have a material impact on the Company’s consolidated financial statements. In June 2016, the FASB issued a new credit loss standard that changes the impairment model for most financial assets and some other instruments. The new guidance will replace the current “incurred loss” approach with an “expected loss” model for instruments measured at amortized cost. It also simplifies the accounting model for purchased credit-impaired debt securities and loans. The guidance will be effective for the Company’s fiscal year starting October 1, 2020. The Company is currently evaluating the impact that the new guidance will have on its consolidated financial statements. In August 2016, the FASB issued new accounting guidance clarifying how entities should classify cash receipts and cash payments on the statement of cash flows. The new guidance also clarifies how the predominance principle should be applied when cash receipts and cash payments have aspects of more than one class of cash flows. The new guidance will be effective for the Company in its fiscal year beginning October 1, 2018 and early adoption is permitted. The Company is currently evaluating the impact that the new guidance will have on its consolidated statement of cash flows. In October 2016, the FASB issued additional guidance on how a single decision maker considers its indirect interests when performing the primary beneficiary analysis under the variable interest model. Under the new guidance, the single decision maker will consider its indirect interests on a proportionate basis. The Company adopted the new guidance on October 1, 2017 and the adoption of this guidance did not have a material impact on the Company’s consolidated financial statements. In January 2017, the FASB issued new accounting guidance to simplify the test for goodwill impairment. This guidance eliminates step two from the goodwill impairment test. Under the new guidance, an entity should recognize an impairment charge for the amount by which the carrying amount of a reporting unit exceeds its fair value. However, the loss recognized should not exceed the total amount of goodwill allocated to the reporting unit. The Company early adopted the new guidance on January 1, 2018 and the adoption of this guidance did not have a material impact on the Company’s consolidated financial statements. In August 2017, the FASB issued new accounting guidance on derivatives and hedging. This guidance better aligns an entity’s risk management activities and financial reporting for hedging relationships through change to both the designation and measurement guidance for qualifying hedging relationships and the presentation of hedging results. The Company early adopted the guidance on January 1, 2018 and the adoption of this guidance did not have a material impact on the Company’s consolidated financial statements.

Business Acquisitions, Goodwill and Intangible Assets

9 Months Ended

Jun. 30, 2018

Business Acquisitions, Goodwill and Intangible Assets

Business Acquisitions, Goodwill and Intangible Assets

3.Business Acquisitions, Goodwill and Intangible Assets

The Company completed one acquisition during the nine months ended June 30, 2018 and two acquisitions during the year ended September 30, 2017 for a total consideration of $5.6 million and $164.4 million, respectively. The business combinations did not meet the quantitative thresholds to require separate disclosures based on the Company’s consolidated net assets, investments and net income. The acquisitions were accounted for under the purchase method of accounting. As such, the purchase considerations were allocated to acquired tangible and intangible assets and liabilities based upon their fair values. The determination of fair values of assets and liabilities acquired requires the Company to make estimates and use valuation techniques when market value is not readily available. Transaction costs associated with business acquisitions are expensed as they are incurred.

On October 17, 2014, the Company completed the acquisition of the U.S. headquartered URS Corporation (URS), an international provider of engineering, construction, and technical services, by purchasing 100% of the outstanding shares of URS common stock. The Company paid total consideration of approximately $2.3 billion in cash and issued approximately $1.6 billion of AECOM common stock to the former stockholders and equity award holders of URS. In connection with the acquisition, the Company also assumed URS’s senior notes totaling $0.4 billion, net of Company repayments. The Company repaid in full URS’s $0.6 billion 2011 term loan and $0.1 billion of URS’s revolving line of credit.

The Company acquired backlog and customer relationship intangible assets valued at $973.8 million representing the fair value of existing contracts and the underlying customer relationships that have lives ranging from 1 to 11 years (weighted average lives of approximately 3 years) in connection with the URS acquisition. Acquired accrued expenses and other current liabilities include URS project liabilities and approximately $240 million related to estimated URS legal settlements and uninsured legal damages; see Note 14, “Commitments and Contingencies,” including legal matters related to former URS affiliates.

Amortization of intangible assets relating to URS, included in cost of revenue, was $16.0 million and $20.9 million during the three months ended June 30, 2018 and 2017, respectively, and $52.4 million and $62.7 million during the nine months ended June 30, 2018 and 2017, respectively. Additionally, included in equity in earnings of joint ventures and noncontrolling interests was intangible amortization expense of $1.7 million and $(2.0) million, respectively, during the three months ended June 30, 2018 and $2.4 million and $(2.1) million, respectively, during the three months ended June 30, 2017, related to joint venture fair value adjustments. Included in equity in earnings of joint ventures and noncontrolling interests was intangible amortization expense of $5.3 million and $(6.2) million, respectively, during the nine months ended June 30, 2018 and $6.9 million and $(6.4) million, respectively, during the nine months ended June 30, 2017, related to joint venture fair value adjustments.

Billings in excess of costs on uncompleted contracts includes a margin fair value liability associated with long-term contracts acquired. This margin fair value liability was $24.1 million at June 30, 2018 and $8.6 million at September 30, 2017, and is recognized as revenue on a percentage-of-completion basis as the applicable projects progress. Income from operations related to the margin fair value liability recognized during the three months ended June 30, 2018 and 2017 was $8.1 million and $1.6 million, respectively.

Acquisition and integration expenses, relating to business acquisitions, in the accompanying consolidated statements of operations are comprised of the following:

	Nine months ended June 30, 2017
	(in millions)
Severance and personnel costs	$	29.9
Professional service, real estate-related, and other expenses	5.5

Total	$	35.4

Included in severance and personnel costs for the nine months ended June 30, 2017 was $7.7 million of severance expenses, which was substantially all paid as of June 30, 2018. All acquisition and integration expenses are classified within the Corporate segment, as presented in Note 15. Our acquisition and integration expenses associated with the URS acquisition are complete.

In the second quarter of fiscal year 2018, management approved a plan to sell non-core oil and gas assets in North America, included in the Company’s Construction Services segment (the Disposal Group). The Company classified the related assets and liabilities of the Disposal Group as held for sale in the consolidated balance sheet. In the third quarter of fiscal year 2018, the Company sold a portion of the assets in the Disposal Group and recognized a $2.1 million loss on disposal. The remaining unsold portion of the Disposal Group remains classified as held for sale. The Company recorded losses related to the remeasurement of the Disposal Group based on estimated fair value less costs to sell resulting in total asset impairments of $168.2 million, recorded in Impairment of Assets Held for Sale. Fair value was estimated using Level 3 inputs, such as forecasted cash flows, and Level 2 inputs, including bid prices from potential buyers. In connection with the classification of the Disposal Group as held for sale, the Company tested the amount of goodwill and other intangible assets allocated to the Disposal Group for impairment. The Company recorded an impairment of goodwill during the nine months ended June 30, 2018 of $125.4 million and an impairment of intangible and other noncurrent assets of $42.8 million. As of June 30, 2018, current assets held for sale were primarily comprised of accounts receivable of $48.0 million and property, plant and equipment of $14.3 million. As of June 30, 2018, current liabilities held for sale were primarily comprised of accounts payable of $12.6 million. The Company expects to complete the sale of the remaining Disposal Group assets within the next twelve months.

The changes in the carrying value of goodwill by reportable segment for the nine months ended June 30, 2018 were as follows:

	September 30, 2017		Measurement Period Adjustments		Impairment			Foreign Exchange Impact			June 30, 2018
	(in millions)
Design and Consulting Services	$	3,218.9	$	—	$	—		$	(24.1	)	$	3,194.8
Construction Services	1,049.9		91.0		(125.4		)	(8.7		)	1,006.8
Management Services	1,724.1		—		—			2.3			1,726.4

Total	$	5,992.9	$	91.0	$	(125.4	)	$	(30.5	)	$	5,928.0

The gross amounts and accumulated amortization of the Company’s acquired identifiable intangible assets with finite useful lives as of June 30, 2018 and September 30, 2017, included in intangible assets—net, in the accompanying consolidated balance sheets, were as follows:

	June 30, 2018							September 30, 2017
	Gross Amount		Accumulated Amortization			Intangible Assets, Net		Gross Amount		Accumulated Amortization			Intangible Assets, Net		Amortization Period
	(in millions)														(years)
Backlog and customer relationships	$	1,286.7	$	(945.0	)	$	341.7	$	1,283.6	$	(870.2	)	$	413.4	1 - 11
Trademark / tradename	18.3		(16.8		)	1.5		18.3		(16.6		)	1.7		0.3 - 2

Total	$	1,305.0	$	(961.8	)	$	343.2	$	1,301.9	$	(886.8	)	$	415.1

Amortization expense of acquired intangible assets included within cost of revenue was $75.0 million and $76.5 million for the nine months ended June 30, 2018 and 2017, respectively. The following table presents estimated amortization expense of existing intangible assets for the remainder of fiscal year 2018 and for the succeeding years:

Fiscal Year	(in millions)
2018 (three months remaining)	$	22.7
2019	83.9
2020	70.0
2021	56.9
2022	44.1
Thereafter	65.6

Total	$	343.2

Accounts Receivable - Net

9 Months Ended

Jun. 30, 2018

Accounts Receivable - Net

Accounts Receivable - Net

4.Accounts Receivable—Net

Net accounts receivable consisted of the following:

	June 30, 2018			September 30, 2017
	(in millions)
Billed	$	2,560.6		$	2,317.8
Unbilled	2,295.0			2,293.5
Contract retentions	638.9			568.6

Total accounts receivable—gross	5,494.5			5,179.9
Allowance for doubtful accounts	(46.5		)	(52.2		)

Total accounts receivable—net	$	5,448.0		$	5,127.7

Billed accounts receivable represents amounts billed to clients that have yet to be collected. Unbilled accounts receivable represents the contract revenue recognized but not yet billed pursuant to contract terms or accounts billed after the period end. Substantially all unbilled receivables as of June 30, 2018 and September 30, 2017 are expected to be billed and collected within twelve months. Contract retentions represent amounts invoiced to clients where payments have been withheld pending the completion of milestones, other contractual conditions, or upon the completion of a project. These retention agreements vary from project to project and could be outstanding for several months or years.

Allowances for doubtful accounts have been determined through specific identification of amounts considered to be uncollectible and potential write-offs, plus a non-specific allowance for other amounts for which some potential loss has been determined to be probable based on current and past experience.

Other than the U.S. government, no single client accounted for more than 10% of the Company’s outstanding receivables at June 30, 2018 and September 30, 2017.

The Company sold trade receivables to financial institutions, of which $342.7 million and $325.2 million were outstanding as of June 30, 2018 and September 30, 2017, respectively. The Company does not retain financial or legal obligations for these receivables that would result in material losses. The Company’s ongoing involvement is limited to the remittance of customer payments to the financial institutions with respect to the sold trade receivables.

- Definition

The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses.

+ References + Details

Joint Ventures and Variable Interest Entities

9 Months Ended

Jun. 30, 2018

Joint Ventures and Variable Interest Entities

Joint Ventures and Variable Interest Entities

5.Joint Ventures and Variable Interest Entities

The Company’s joint ventures provide architecture, engineering, program management, construction management, operations and maintenance services, and invest in real estate, public-private partnership (P3) and infrastructure projects. Joint ventures, the combination of two or more partners, are generally formed for a specific project. Management of the joint venture is typically controlled by a joint venture executive committee, comprised of representatives from the joint venture partners. The joint venture executive committee normally provides management oversight and controls decisions which could have a significant impact on the joint venture.

Some of the Company’s joint ventures have no employees and minimal operating expenses. For these joint ventures, the Company’s employees perform work for the joint venture, which is then billed to a third-party customer by the joint venture. These joint ventures function as pass through entities to bill the third-party customer. For consolidated joint ventures of this type, the Company records the entire amount of the services performed and the costs associated with these services, including the services provided by the other joint venture partners, in the Company’s result of operations. For some of these joint ventures where a fee is added by an unconsolidated joint venture to client billings, the Company’s portion of that fee is recorded in equity in earnings of joint ventures.

The Company also has joint ventures that have their own employees and operating expenses, and to which the Company generally makes a capital contribution. The Company accounts for these joint ventures either as consolidated entities or equity method investments based on the criteria further discussed below.

The Company follows guidance on the consolidation of variable interest entities (VIEs) that requires companies to utilize a qualitative approach to determine whether it is the primary beneficiary of a VIE. The process for identifying the primary beneficiary of a VIE requires consideration of the factors that indicate a party has the power to direct the activities that most significantly impact the joint venture’s economic performance, including powers granted to the joint venture’s program manager, powers contained in the joint venture governing board and a company’s economic interest in the joint venture. The Company analyzes its joint ventures and classifies them as either:

a VIE that must be consolidated because the Company is the primary beneficiary or the joint venture is not a VIE and the Company holds the majority voting interest with no significant participative rights available to the other partners; or

a VIE that does not require consolidation and is treated as an equity method investment because the Company is not the primary beneficiary or the joint venture is not a VIE and the Company does not hold the majority voting interest.

As part of the above analysis, if it is determined that the Company has the power to direct the activities that most significantly impact the joint venture’s economic performance, the Company considers whether or not it has the obligation to absorb losses or rights to receive benefits of the VIE that could potentially be significant to the VIE.

Contractually required support provided to the Company’s joint ventures is further discussed in Note 14.

Summary of unaudited financial information of the consolidated joint ventures is as follows:

	June 30, 2018		September 30, 2017
	(in millions)
Current assets	$	906.0	$	832.1
Non-current assets	198.4		188.8

Total assets	$	1,104.4	$	1,020.9


Current liabilities	$	638.2	$	524.9
Non-current liabilities	12.3		12.4

Total liabilities	650.5		537.3
Total AECOM equity	272.1		274.7
Noncontrolling interests	181.8		208.9

Total owners’ equity	453.9		483.6

Total liabilities and owners’ equity	$	1,104.4	$	1,020.9

Total revenue of the consolidated joint ventures was $1,820.8 million and $1,457.0 million for the nine months ended June 30, 2018 and 2017, respectively. The assets of the Company’s consolidated joint ventures are restricted for use only by the particular joint venture and are not available for the general operations of the Company.

Summary of unaudited financial information of the unconsolidated joint ventures is as follows:

	June 30, 2018		September 30, 2017
	(in millions)
Current assets	$	1,759.0	$	1,912.2
Non-current assets	896.5		749.8

Total assets	$	2,655.5	$	2,662.0


Current liabilities	$	1,381.6	$	1,570.2
Non-current liabilities	223.0		185.1

Total liabilities	1,604.6		1,755.3
Joint ventures’ equity	1,050.9		906.7

Total liabilities and joint ventures’ equity	$	2,655.5	$	2,662.0


AECOM’s investment in joint ventures	$	398.1	$	364.2

	Nine Months Ended
	June 30, 2018		June 30, 2017
	(in millions)
Revenue	$	4,041.7	$	4,077.7
Cost of revenue	3,843.7		3,862.9

Gross profit	$	198.0	$	214.8

Net income	$	191.8	$	205.3

Summary of AECOM’s equity in earnings of unconsolidated joint ventures is as follows:

	Nine Months Ended
	June 30, 2018		June 30, 2017
	(in millions)
Pass through joint ventures	$	29.8	$	27.5
Other joint ventures	25.8		82.2

Total	$	55.6	$	109.7

Pension Benefit Obligations

9 Months Ended

Jun. 30, 2018

Pension Benefit Obligations

Pension Benefit Obligations

6.Pension Benefit Obligations

In the U.S., the Company sponsors various qualified defined benefit pension plans. Benefits under these plans generally are based on the employee’s years of creditable service and compensation; however, all U.S. defined benefit plans are closed to new participants and have frozen accruals.

The Company also sponsors various non-qualified plans in the U.S.; all of these plans are frozen. Outside the U.S., the Company sponsors various pension plans, which are appropriate to the country in which the Company operates, some of which are government mandated.

The following table details the components of net periodic cost for the Company’s pension plans for the three and nine months ended June 30, 2018 and 2017:

	Three Months Ended												Nine Months Ended
	June 30, 2018						June 30, 2017						June 30, 2018						June 30, 2017
	U.S.			Int’l			U.S.			Int’l			U.S.			Int’l			U.S.			Int’l
	(in millions)
Components of net periodic (benefit) cost:
Service costs	$	1.3		$	0.2		$	1.0		$	0.3		$	3.7		$	0.8		$	3.2		$	0.9
Interest cost on projected benefit obligation	5.1			8.1			4.8			7.1			15.5			24.3			14.4			21.0
Expected return on plan assets	(7.9		)	(10.8		)	(7.7		)	(10.5		)	(23.6		)	(32.6		)	(23.2		)	(30.8		)
Amortization of prior service cost	—			—			—			—			—			(0.1		)	—			(0.1		)
Amortization of net loss	1.0			2.0			1.0			3.3			3.0			6.2			3.2			9.7
Settlement loss recognized	—			—			—			—			—			0.2			—			—

Net periodic (benefit) cost	$	(0.5	)	$	(0.5	)	$	(0.9	)	$	0.2		$	(1.4	)	$	(1.2	)	$	(2.4	)	$	0.7

The total amounts of employer contributions paid for the nine months ended June 30, 2018 were $6.6 million for U.S. plans and $21.1 million for non-U.S. plans. The expected remaining scheduled annual employer contributions for the fiscal year ending September 30, 2018 are $5.2 million for U.S. plans and $6.2 million for non-U.S. plans.

Debt

9 Months Ended

Jun. 30, 2018

Debt

Debt

7.Debt

Debt consisted of the following:

	June 30, 2018			September 30, 2017
	(in millions)
2014 Credit Agreement	$	1,667.7		$	908.7
2014 Senior Notes	800.0			1,600.0
2017 Senior Notes	1,000.0			1,000.0
URS Senior Notes	247.8			247.7
Other debt	214.3			140.0

Total debt	3,929.8			3,896.4
Less: Current portion of debt and short-term borrowings	(173.0		)	(142.0		)
Less: Unamortized debt issuance costs	(49.5		)	(52.3		)

Long-term debt	$	3,707.3		$	3,702.1

The following table presents, in millions, scheduled maturities of the Company’s debt as of June 30, 2018:

Fiscal Year
2018 (three months remaining)	$	72.7
2019	122.2
2020	86.9
2021	485.8
2022	301.0
Thereafter	2,861.2

Total	$	3,929.8

2014 Credit Agreement

The Company entered into a credit agreement (Credit Agreement) on October 17, 2014, which, as amended to date, consists of (i) a term loan A facility that includes a $510 million (US) term loan A facility with a term expiring on March 13, 2021 and a $500 million Canadian dollar (CAD) term loan A facility and a $250 million Australian dollar (AUD) term loan A facility, each with terms expiring on March 13, 2023; (ii) a $600 million term loan B facility with a term expiring on March 13, 2025; and (iii) a revolving credit facility in an aggregate principal amount of $1.35 billion with a term expiring on March 13, 2023. Some subsidiaries of the Company (Guarantors) have guaranteed the obligations of the borrowers under the Credit Agreement. The borrowers’ obligations under the Credit Agreement are secured by a lien on substantially all of the assets of the Company and the Guarantors pursuant to a security and pledge agreement (Security Agreement). The collateral under the Security Agreement is subject to release upon fulfillment of conditions specified in the Credit Agreement and Security Agreement.

The Credit Agreement contains covenants that limit the ability of the Company and the ability of some of its subsidiaries to, among other things: (i) create, incur, assume, or suffer to exist liens; (ii) incur or guarantee indebtedness; (iii) pay dividends or repurchase stock; (iv) enter into transactions with affiliates; (v) consummate asset sales, acquisitions or mergers; (vi) enter into various types of burdensome agreements; or (vii) make investments.

On July 1, 2015, the Credit Agreement was amended to revise the definition of “Consolidated EBITDA” to increase the allowance for acquisition and integration expenses related to the acquisition of URS.

On December 22, 2015, the Credit Agreement was amended to further revise the definition of “Consolidated EBITDA” by further increasing the allowance for acquisition and integration expenses related to the acquisition of URS and to allow for an internal corporate restructuring primarily involving its international subsidiaries.

On September 29, 2016, the Credit Agreement and the Security Agreement were amended to (1) lower the applicable interest rate margins for the term loan A and the revolving credit facilities, and lower the applicable letter of credit fees and commitment fees to the revised consolidated leverage levels; (2) extend the term of the term loan A and the revolving credit facility to September 29, 2021; (3) add a new delayed draw term loan A facility tranche in the amount of $185.0 million; (4) replace the then existing $500 million performance letter of credit facility with a $500 million basket to enter into secured letters of credit outside the Credit Agreement; and (5) revise covenants, including the Maximum Consolidated Leverage Ratio so that the step down from a 5.00 to a 4.75 leverage ratio is effective as of March 31, 2017 as well as the investment basket for its AECOM Capital business.

On March 31, 2017, the Credit Agreement was amended to (1) expand the ability of restricted subsidiaries to borrow under “Incremental Term Loans;” (2) revise the definition of “Working Capital” as used in “Excess Cash Flow;” (3) revise the definitions for “Consolidated EBITDA” and “Consolidated Funded Indebtedness” to reflect the expected gain and debt repayment of an AECOM Capital disposition, which disposition was completed on April 28, 2017; and (4) amend provisions relating to the Company’s ability to undertake internal restructuring steps to accommodate changes in tax laws.

On March 13, 2018, the Credit Agreement was amended to (1) refinance the existing term loan A facility to include a $510 million (US) term loan A facility with a term expiring on March 13, 2021 and a $500 million CAD term loan A facility and a $250 million AUD term loan A facility each with terms expiring on March 13, 2023; (2) issue a new $600 million term loan B facility to institutional investors with a term expiring on March 13, 2025; (3) increase the capacity of the Company’s revolving credit facility from $1.05 billion to $1.35 billion and extend its term until March 13, 2023; (4) reduce the Company’s interest rate borrowing costs as follows: (a) the term loan B facility, at the Company’s election, Base Rate (as defined in the Credit Agreement) plus 0.75% or Eurocurrency Rate (as defined in the Credit Agreement) plus 1.75%, (b) the (US) term loan A facility, at the Company’s election, Base Rate plus 0.50% or Eurocurrency Rate plus 1.50%, and (c) the Canadian (CAD) term loan A facility, the Australian (AUD) term loan A facility, and the revolving credit facility, an initial rate of, at the Company’s election, Base Rate plus 0.75% or Eurocurrency Rate plus 1.75%, and after the end of the Company’s fiscal quarter ended June 30, 2018, Base Rate loans plus a margin ranging from 0.25% to 1.00% or Eurocurrency Rate plus a margin from 1.25% to 2.00%, based on the Consolidated Leverage Ratio (as defined in the Credit Agreement); and (5) revise covenants including increasing the amounts available under the restricted payment negative covenant and revising the Maximum Consolidated Leverage Ratio (as defined in the Credit Agreement) to include a 4.5 leverage ratio through September 30, 2019 after which the leverage ratio steps down to 4.0.

Under the Credit Agreement, the Company is subject to a maximum consolidated leverage ratio and minimum consolidated interest coverage ratio at the end of each fiscal quarter. The Company’s Consolidated Leverage Ratio was 4.1 at June 30, 2018. The Company’s Consolidated Interest Coverage Ratio was 4.6 at June 30, 2018. As of June 30, 2018, the Company was in compliance with the covenants of the Credit Agreement.

At June 30, 2018 and September 30, 2017, outstanding standby letters of credit totaled $53.9 million and $58.1 million, respectively, under the Company’s revolving credit facilities. As of June 30, 2018 and September 30, 2017, the Company had $1,220.4 million and $991.9 million, respectively, available under its revolving credit facility.

2014 Senior Notes

On October 6, 2014, the Company completed a private placement offering of $800,000,000 aggregate principal amount of its unsecured 5.75% Senior Notes due 2022 (2022 Notes) and $800,000,000 aggregate principal amount of its unsecured 5.875% Senior Notes due 2024 (the 2024 Notes and, together with the 2022 Notes, the 2014 Senior Notes). On November 2, 2015, the Company completed an exchange offer to exchange the unregistered 2014 Senior Notes for registered notes, as well as all related guarantees. On March 16, 2018, the Company redeemed all of the 2022 Notes at a redemption price that was 104.313% of the principal amount outstanding plus accrued and unpaid interest. The March 16, 2018 redemption resulted in a $34.5 million prepayment premium, which was included in interest expense.

As of June 30, 2018, the estimated fair value of its 2024 Notes was approximately $824.0 million. The fair value of the 2024 Notes as of June 30, 2018 was derived by taking the mid-point of the trading prices from an observable market input (Level 2) in the secondary bond market and multiplying it by the outstanding balance of the 2024 Notes.

At any time prior to July 15, 2024, the Company may redeem on one or more occasions all or part of the 2024 Notes at a redemption price equal to the sum of (i) 100% of the principal amount thereof, plus (ii) a “make-whole” premium as of the date of the redemption, plus any accrued and unpaid interest to the date of redemption. In addition, on or after July 15, 2024, the 2024 Notes may be redeemed at a redemption price of 100% of the principal amount thereof, plus accrued and unpaid interest to the date of redemption.

The indenture pursuant to which the 2024 Notes were issued contains customary events of default, including, among other things, payment default, exchange default, failure to provide notices thereunder and provisions related to bankruptcy events. The indenture also contains customary negative covenants.

The Company was in compliance with the covenants relating to the 2024 Notes as of June 30, 2018.

2017 Senior Notes

On February 21, 2017, the Company completed a private placement offering of $1,000,000,000 aggregate principal amount of its unsecured 5.125% Senior Notes due 2027 (the 2017 Senior Notes) and used the note proceeds to immediately retire the remaining $127.6 million outstanding on the then existing term loan B facility as well as repay $600 million of the term loan A facility and $250 million of the revolving credit facility under its Credit Agreement. On June 30, 2017, the Company completed an exchange offer to exchange the unregistered 2017 Senior Notes for registered notes, as well as related guarantees.

As of June 30, 2018, the estimated fair value of the Company’s 2017 Senior Notes was approximately $935.0 million. The fair value of the Company’s 2017 Senior Notes as of June 30, 2018 was derived by taking the mid-point of the trading prices from an observable market input (Level 2) in the secondary bond market and multiplying it by the outstanding balance of the 2017 Senior Notes. Interest is payable on the 2017 Senior Notes at a rate of 5.125% per annum. Interest on the 2017 Senior Notes is payable semi-annually on March 15 and September 15 of each year. The 2017 Senior Notes will mature on March 15, 2027.

At any time and from time to time prior to December 15, 2026, the Company may redeem all or part of the 2017 Senior Notes, at a redemption price equal to 100% of their principal amount, plus a “make whole” premium as of the redemption date, and accrued and unpaid interest to the redemption date.

In addition, at any time and from time to time prior to March 15, 2020, the Company may redeem up to 35% of the original aggregate principal amount of the 2017 Senior Notes with the proceeds of one or more qualified equity offerings, at a redemption price equal to 105.125%, plus accrued and unpaid interest. Furthermore, at any time on or after December 15, 2026, the Company may redeem on one or more occasions all or part of the 2017 Senior Notes at a redemption price equal to 100% of their principal amount, plus accrued and unpaid interest.

The indenture pursuant to which the 2017 Senior Notes were issued contains customary events of default, including, among other things, payment default, exchange default, failure to provide notices thereunder and provisions related to bankruptcy events. The indenture also contains customary negative covenants.

The Company was in compliance with the covenants relating to the 2017 Senior Notes as of June 30, 2018.

URS Senior Notes

In connection with the URS acquisition, the Company assumed URS 3.85% Senior Notes due 2017 (2017 URS Senior Notes) and the URS 5.00% Senior Notes due 2022 (2022 URS Senior Notes), totaling $1.0 billion (URS Senior Notes). The URS acquisition triggered change in control provisions in the URS Senior Notes that allowed the holders of the URS Senior Notes to redeem their URS Senior Notes at a cash price equal to 101% of the principal amount and, accordingly, the Company redeemed $572.3 million of the URS Senior Notes on October 24, 2014. The remaining 2017 URS Senior Notes matured and were fully redeemed on April 3, 2017 for $179.2 million using proceeds from a $185 million delayed draw term loan A facility tranche under the Credit Agreement. The 2022 URS Senior Notes are general unsecured senior obligations of AECOM Global II, LLC (as successor in interest to URS) and are fully and unconditionally guaranteed on a joint-and-several basis by some former URS domestic subsidiary guarantors.

As of June 30, 2018, the estimated fair value of the 2022 URS Senior Notes was approximately $251.0 million. The carrying value of the 2022 URS Senior Notes on the Company’s Consolidated Balance Sheets as of June 30, 2018 was $247.8 million. The fair value of the 2022 URS Senior Notes as of June 30, 2018 was derived by taking the mid-point of the trading prices from an observable market input (Level 2) in the secondary bond market and multiplying it by the outstanding balance of the 2022 URS Senior Notes.

As of June 30, 2018, the Company was in compliance with the covenants relating to the 2022 URS Senior Notes.

Other Debt and Other Items

Other debt consists primarily of obligations under capital leases and loans, and unsecured credit facilities of $214.3 million as of June 30, 2018. The Company’s unsecured credit facilities are primarily used for standby letters of credit issued in conjunction with general and professional liability insurance programs and for contract performance guarantees. At June 30, 2018 and September 30, 2017, these outstanding standby letters of credit totaled $451.9 million and $445.7 million, respectively. As of June 30, 2018, the Company had $485.9 million available under these unsecured credit facilities.

Effective Interest Rate

The Company’s average effective interest rate on its total debt, including the effects of the interest rate swap agreements, during the nine months ended June 30, 2018 and 2017 was 4.6% and 4.4%, respectively.

Interest expense in the consolidated statements of operations for the nine months ended June 30, 2018 included a prepayment premium of $34.5 million to redeem the 2022 Notes. Additionally, amortization of deferred debt issuance costs for the three and nine months ended June 30, 2018 was $2.5 million and $15.1 million, respectively, and for the three and nine months ended June 30, 2017 was $2.8 million and $14.3 million, respectively.

Derivative Financial Instruments and Fair Value Measurements

9 Months Ended

Jun. 30, 2018

Derivative Financial Instruments and Fair Value Measurements

Derivative Financial Instruments and Fair Value Measurements

8.Derivative Financial Instruments and Fair Value Measurements

The Company uses interest rate derivative contracts to hedge interest rate exposures on the Company’s variable rate debt. The Company enters into foreign currency derivative contracts with financial institutions to reduce the risk that its cash flows and earnings will be adversely affected by foreign currency exchange rate fluctuations. The Company’s hedging program is not designated for trading or speculative purposes.

The Company recognizes derivative instruments as either assets or liabilities on the accompanying consolidated balance sheets at fair value. The Company records changes in the fair value (i.e., gains or losses) of the derivatives that have been designated as accounting hedges in the accompanying consolidated statements of operations as cost of revenue, interest expense or to accumulated other comprehensive loss in the accompanying consolidated balance sheets.

Cash Flow Hedges

The Company uses interest rate swap agreements designated as cash flow hedges to fix the variable interest rates on portions of the Company’s debt. The Company also uses foreign currency contracts designated as cash flow hedges to hedge forecasted revenue transactions denominated in currencies other than the U.S. dollar. The Company initially reports any gain on the effective portion of a cash flow hedge as a component of accumulated other comprehensive loss. Depending on the type of cash flow hedge, the gain is subsequently reclassified to either interest expense when the interest expense on the variable rate debt is recognized, or to cost of revenue when the hedged revenues are recorded. If the hedged transaction becomes probable of not occurring, any gain or loss related to interest rate swap agreements or foreign currency contracts would be recognized in other income (expense). Further, the Company excludes the change in the time value of the foreign currency contracts from the assessment of hedge effectiveness. The Company records the premium paid or time value of a contract on the date of purchase as an asset. Thereafter, the Company recognizes any change to this time value in cost of revenue.

The notional principal in U.S. dollar (USD), Canadian dollar (CAD), and Australian dollar (AUD), fixed rates and related expiration dates of the Company’s outstanding interest rate swap agreements were as follows:

June 30, 2018
Notional Amount Currency	Notional Amount (in millions)	Fixed Rate		Expiration Date
USD	300.0	1.54	%	September 2018
AUD	200.0	2.19	%	February 2021
CAD	400.0	2.49	%	September 2022
USD	200.0	2.60	%	February 2023

September 30, 2017
Notional Amount Currency	Notional Amount (in millions)	Fixed Rate		Expiration Date
USD	300.0	1.63	%	June 2018
USD	300.0	1.54	%	September 2018

The notional principal of outstanding foreign currency contracts to purchase AUD was AUD 67.3 million (or $50.9 million) and AUD 15.1 million (or $11.3 million) at June 30, 2018 and September 30, 2017, respectively.

Other Foreign Currency Forward Contracts

The Company uses foreign currency forward contracts which are not designated as accounting hedges to hedge intercompany transactions and other monetary assets or liabilities denominated in currencies other than the functional currency of a subsidiary. Gains and losses on these contracts were not material for the nine months ended June 30, 2018 and 2017.

Fair Value Measurements

The Company’s non-pension financial assets and liabilities recorded at fair value relate to derivative instruments and were not material at June 30, 2018 or September 30, 2017.

See Note 13 for accumulated balances and reporting period activities of derivatives related to reclassifications out of accumulated other comprehensive income or loss for the nine months ended June 30, 2018 and 2017. Amounts recognized in accumulated other comprehensive loss from the Company’s foreign currency contracts were immaterial for all periods presented. Amounts reclassified from accumulated other comprehensive loss into income from the foreign currency options were immaterial for all periods presented. Additionally, there were no losses recognized in income due to amounts excluded from effectiveness testing from the Company’s interest rate swap agreements.

During the year ended September 30, 2015, the Company entered into a contingent consideration arrangement in connection with a business acquisition. Under the arrangement, the Company agreed to pay cash to the sellers if financial performance thresholds are achieved in the future. The fair value of the contingent consideration liability, net of amounts paid, as of June 30, 2018 and September 30, 2017 was $13 million and $13 million, respectively. This liability is a Level 3 fair value measurement recorded within other accrued liabilities, and was valued based on estimated future net cash flows. Any future changes in the fair value of this contingent consideration liability will be recognized in earnings during the applicable period.

Share-based Payments

9 Months Ended

Jun. 30, 2018

Share-based Payments

Share-based Payments

9.Share-based Payments

The fair value of an outstanding employee stock option award is estimated on the date of grant. The expected term of the stock option granted represents the period of time the stock option expected to be outstanding. The risk-free interest rate is based on U.S. Treasury bond rates with maturities equal to the expected term of the stock option on the grant date. The Company uses historical data as a basis to estimate the probability of forfeitures.

Stock option activity for the nine months ended June 30 was as follows:

	2018				2017
	Shares of stock under options		Weighted average exercise price		Shares of stock under options		Weighted average exercise price
	(in millions)				(in millions)
Outstanding at September 30, prior year	0.7		$	31.11	0.9		$	30.36
Options granted	—		—		—		—
Options exercised	(0.1	)	27.79		(0.2	)	26.42
Options forfeited or expired	—		—		—		—

Outstanding at June 30	0.6		31.62		0.7		31.11


Vested and expected to vest in the future as of June 30	0.6		$	31.62	0.7		$	31.11

The Company grants stock units to employees under its Performance Earnings Program (PEP), whereby units are earned and issued dependent upon meeting established cumulative performance objectives and vest over a three-year service period. Additionally, the Company issues restricted stock units to employees which are earned based on service conditions. The grant date fair value of PEP awards and restricted stock unit awards is that day’s closing market price of the Company’s common stock. The weighted average grant date fair value of PEP awards was $37.69 and $38.16 during the nine months ended June 30, 2018 and 2017, respectively. The weighted average grant date fair value of restricted stock unit awards was $36.91 and $37.97 during the nine months ended June 30, 2018 and 2017, respectively. Total compensation expense related to share-based payments including stock options was $54.3 million and $58.7 million during the nine months ended June 30, 2018 and 2017, respectively. Unrecognized compensation expense related to total share-based payments outstanding as of June 30, 2018 and September 30, 2017 was $111.1 million and $96.8 million, respectively, to be recognized on a straight-line basis over the awards’ respective vesting periods which are generally three years.

Income Taxes	9 Months Ended
Income Taxes	Jun. 30, 2018
Income Taxes
Income Taxes	10.Income Taxes The Company’s effective tax rate was (71.8)% and 0.5% for the nine months ended June 30, 2018 and 2017, respectively. The most significant items contributing to the difference between the statutory U.S. federal income tax rate of 24.5% and the Company’s effective tax rate for the nine-month period ended June 30, 2018 were a $41.7 million net benefit related to one-time U.S. federal tax law changes, a benefit of $33.8 million related to changes in uncertain tax positions primarily in the U.S. and Canada, and a benefit of $21.6 million related to income tax credits and incentives, partially offset by tax expense of $33.9 million related to a goodwill impairment charge, which was non-deductible for tax purposes. These items are not expected to have a continuing impact on the effective tax rate for the remainder of the fiscal year except for the benefits related to income tax credits and incentives. During the second quarter of fiscal year 2018, the Company received a favorable settlement of uncertain tax positions in the U.S. related to R&D credits for tax years 2012, 2013 and 2014 and as a result, recorded an income tax benefit of $26.2 million, which included the remeasurement of its U.S. R&D credit uncertain tax positions for future years based on the favorable outcome of the examination. During the first quarter of fiscal year 2018, President Trump signed what is commonly referred to as The Tax Cuts and Jobs Act (Tax Act) into law. The Tax Act reduced the Company’s U.S. federal corporate tax rate from 35% to a blended tax rate of 24.5% for the Company’s fiscal year ending September 30, 2018 and 21% for fiscal years thereafter, requires companies to pay a one-time transition tax on accumulated earnings of foreign subsidiaries, creates new taxes on foreign sourced earnings and eliminates or reduces deductions. Given the significance of the Tax Act, the SEC staff issued Staff Accounting Bulletin No. 118 (SAB 118), which allows registrants to record provisional amounts during a one year “measurement period” similar to that used when accounting for business combinations. However, the measurement period is deemed to have ended earlier when the registrant has obtained, prepared and analyzed the information necessary to finalize its accounting. During the measurement period, impacts of the law are expected to be recorded at the time a reasonable estimate for all or a portion of the effects can be made, and provisional amounts can be recognized and adjusted as information becomes available, prepared or analyzed. At June 30, 2018, the Company has not completed its accounting for the tax effects of enactment of the Tax Act; however, the Company made a reasonable estimate of the effects on its existing deferred tax balances and other assets and liabilities and the one-time transition tax during the quarter ended December 31, 2017. The Company has not been able to make a reasonable estimate of the impact on its indefinite reinvestment of earnings of foreign subsidiaries and therefore will continue to account for those items based on its existing accounting under ASC 740. As further guidance and accounting interpretations are expected, the Company’s analysis is considered incomplete. Other significant provisions include a base erosion anti-abuse tax (BEAT) on excessive amounts paid to foreign related parties and a minimum tax on global intangible low-taxed income (GILTI). The Company has not elected a method of accounting for BEAT and GILTI and will only do so after completion of the analysis of the provisions and the impact to the Company. In the first quarter of fiscal year 2018, the Company remeasured U.S. deferred tax assets and liabilities based on the rates at which they are expected to reverse in the future, which is generally 21%. However, the Company is still analyzing the Tax Act and refining its calculations which could potentially affect the measurement of these balances. The provisional amount recorded in the first quarter related to the remeasurement of the Company’s deferred tax balance was a $36.1 million tax benefit. In addition in the first quarter, the Company released the deferred tax liability and recorded a tax benefit of $77.0 million related to foreign subsidiaries for which the undistributed earnings are not intended to be reinvested indefinitely and accrued current tax on these earnings as part of the one-time transition tax. As of June 30, 2018, the Company has not made any additional measurement period adjustments related to these items. During the first quarter of fiscal year 2018, the Company recorded a provisional amount for the one-time transition tax liability for its foreign subsidiaries resulting in an increase in income tax expense of $71.4 million. The Company has not yet completed its calculation of the total foreign earnings and profits of its foreign subsidiaries. Further, the transition tax is based in part on the amount of those earnings held in cash and other specified assets at the end of the fiscal year. This amount may change when the Company finalizes the calculation of foreign earnings and finalize the amounts held in cash or other specified assets. As of June 30, 2018, the Company has not made any additional measurement period adjustments related to these items. The Company is utilizing the annual effective tax rate method under ASC 740 to compute its interim tax provision. The Company’s effective tax rate fluctuates from quarter to quarter due to various factors including the change in the mix of global income and expenses, outcomes of administrative audits, changes in the assessment of valuation allowances due to management’s consideration of new positive or negative evidence during the quarter, and changes in enacted tax laws and their interpretations which upon enactment include possible tax reform around the world arising from the result of the base erosion and profit shifting project undertaken by the Organisation for Economic Co-operation Development which, if finalized and adopted, could have a material impact on the Company’s income tax expense and deferred tax balances. The Company is currently under tax audit in several jurisdictions including a U.S. federal income tax examination for URS-pre-acquisition tax years 2012, 2013 and 2014. The Company believes the outcomes which are reasonably possible within the next twelve months, including lapses in statutes of limitations, could result in an adjustment to U.S. net operating loss carryforwards, but will not result in a material change in the liability for uncertain tax positions. Generally, the Company does not provide for U.S. taxes or foreign withholding taxes on gross book-tax differences in its non-U.S. subsidiaries because such basis differences of approximately $1.7 billion are able to and intended to be reinvested indefinitely. At June 30, 2018, the Company has not determined whether it will continue to indefinitely reinvest the earnings of foreign subsidiaries and therefore will continue to account for these undistributed earnings based on existing accounting under ASC 740 and not accrue additional tax outside of the one-time transition tax described above. There may also be additional U.S. or foreign income tax liability upon repatriation, although the calculation of such additional taxes is not practicable.

Earnings Per Share

9 Months Ended

Jun. 30, 2018

Earnings Per Share

Earnings Per Share

11.Earnings Per Share

Basic earnings per share (EPS) excludes dilution and is computed by dividing net income attributable to AECOM by the weighted average number of common shares outstanding for the period. Diluted EPS is computed by dividing net income attributable to AECOM by the weighted average number of common shares outstanding and potential common shares for the period. The Company includes as potential common shares the weighted average dilutive effects of equity awards using the treasury stock method. For the three and nine months ended June 30, 2018 and 2017, equity awards excluded from the calculation of potential common shares were not significant.

The following table sets forth a reconciliation of the denominators for basic and diluted earnings per share:

	Three Months Ended		Nine Months Ended
	June 30, 2018	June 30, 2017	June 30, 2018	June 30, 2017
	(in millions)
Denominator for basic earnings per share	160.4	155.8	159.3	155.1
Potential common shares	2.8	3.0	3.1	3.4

Denominator for diluted earnings per share	163.2	158.8	162.4	158.5

Other Financial Information

9 Months Ended

Jun. 30, 2018

Other Financial Information

Other Financial Information

12.Other Financial Information

Accrued expenses and other current liabilities consist of the following:

	June 30, 2018		September 30, 2017
	(in millions)
Accrued salaries and benefits	$	938.9	$	1,018.5
Accrued contract costs	853.3		911.9
Other accrued expenses	392.5		315.1

	$	2,184.7	$	2,245.5

Accrued contract costs above include balances related to professional liability accruals of $540.5 million and $547.9 million as of June 30, 2018 and September 30, 2017, respectively. The remaining accrued contract costs primarily relate to costs for services provided by subcontractors and other non-employees. Liabilities recorded related to accrued contract losses were not material as of June 30, 2018 and September 30, 2017. The Company did not have material revisions to estimates for contracts where revenue is recognized using the percentage-of-completion method during the nine months ended June 30, 2018. The Company incurred $26.7 million of primarily severance expenses relating to restructuring activities during the nine months ended June 30, 2018, of which $23.3 million was paid as of June 30, 2018.

During the twelve months ended September 30, 2016, the Company recorded revenue related to the expected accelerated recovery of a pension related entitlement from the federal government of approximately $50 million, which is included in accounts receivable-net at June 30, 2018. The entitlement resulted from pension costs that are reimbursable through government contracts in accordance with Cost Accounting Standards. The accelerated recognition resulted from an amendment to freeze pension benefits under URS Federal Services, Inc. Employees Retirement Plan. The actual amount of reimbursement may vary from the Company’s expectation.

Reclassifications out of Accumulated Other Comprehensive Loss

9 Months Ended

Jun. 30, 2018

Reclassifications out of Accumulated Other Comprehensive Loss

Reclassifications out of Accumulated Other Comprehensive Loss

13.Reclassifications out of Accumulated Other Comprehensive Loss

The accumulated balances and reporting period activities for the three and nine months ended June 30, 2018 and 2017 related to reclassifications out of accumulated other comprehensive loss are summarized as follows (in millions):

	Pension Related Adjustments			Foreign Currency Translation Adjustments			Loss on Derivative Instruments			Accumulated Other Comprehensive Loss
Balances at March 31, 2018	$	(295.5	)	$	(410.2	)	$	(1.3	)	$	(707.0	)
Other comprehensive income (loss) before reclassification	13.0			(67.1		)	0.4			(53.7		)
Amounts reclassified from accumulated other comprehensive loss	2.2			—			0.2			2.4

Balances at June 30, 2018	$	(280.3	)	$	(477.3	)	$	(0.7	)	$	(758.3	)

	Pension Related Adjustments			Foreign Currency Translation Adjustments			Loss on Derivative Instruments			Accumulated Other Comprehensive Loss
Balances at March 31, 2017	$	(353.5	)	$	(516.8	)	$	(1.3	)	$	(871.6	)
Other comprehensive (loss) income before reclassification	(9.8		)	46.0			(0.1		)	36.1
Amounts reclassified from accumulated other comprehensive loss	3.2			—			0.6			3.8

Balances at June 30, 2017	$	(360.1	)	$	(470.8	)	$	(0.8	)	$	(831.7	)

	Pension Related Adjustments			Foreign Currency Translation Adjustments			Loss on Derivative Instruments			Accumulated Other Comprehensive Loss
Balances at September 30, 2017	$	(281.9	)	$	(418.4	)	$	(0.4	)	$	(700.7	)
Other comprehensive loss before reclassification	(5.8		)	(58.9		)	(0.7		)	(65.4		)
Amounts reclassified from accumulated other comprehensive loss	7.4			—			0.4			7.8

Balances at June 30, 2018	$	(280.3	)	$	(477.3	)	$	(0.7	)	$	(758.3	)

	Pension Related Adjustments			Foreign Currency Translation Adjustments			Loss on Derivative Instruments			Accumulated Other Comprehensive Loss
Balances at September 30, 2016	$	(368.9	)	$	(483.7	)	$	(5.0	)	$	(857.6	)
Other comprehensive (loss) income before reclassification	(0.7		)	12.9			2.1			14.3
Amounts reclassified from accumulated other comprehensive income	9.5			—			2.1			11.6

Balances at June 30, 2017	$	(360.1	)	$	(470.8	)	$	(0.8	)	$	(831.7	)

Commitments and Contingencies	9 Months Ended
Commitments and Contingencies	Jun. 30, 2018
Commitments and Contingencies
Commitments and Contingencies	14.Commitments and Contingencies The Company records amounts representing its probable estimated liabilities relating to claims, guarantees, litigation, audits and investigations. The Company relies in part on qualified actuaries to assist it in determining the level of reserves to establish for insurance-related claims that are known and have been asserted against it, and for insurance-related claims that are believed to have been incurred based on actuarial analysis, but have not yet been reported to the Company’s claims administrators as of the respective balance sheet dates. The Company includes any adjustments to such insurance reserves in its consolidated results of operations. The Company’s reasonably possible loss disclosures are presented on a gross basis prior to the consideration of insurance recoveries. The Company does not record gain contingencies until they are realized. In the ordinary course of business, the Company may not be aware that it or its affiliates are under investigation and may not be aware of whether or not a known investigation has been concluded. In the ordinary course of business, the Company may enter into various arrangements providing financial or performance assurance to clients, lenders, or partners. Such arrangements include standby letters of credit, surety bonds, and corporate guarantees to support the creditworthiness or the project execution commitments of its affiliates, partnerships and joint ventures. Performance arrangements typically have various expiration dates ranging from the completion of the project contract and extending beyond contract completion in some circumstances such as for warranties. The Company may also guarantee that a project, when complete, will achieve specified performance standards. If the project subsequently fails to meet guaranteed performance standards, the Company may incur additional costs, pay liquidated damages or be held responsible for the costs incurred by the client to achieve the required performance standards. The potential payment amount of an outstanding performance arrangement is typically the remaining cost of work to be performed by or on behalf of third parties. Generally, under joint venture arrangements, if a partner is financially unable to complete its share of the contract, the other partner(s) may be required to complete those activities. At June 30, 2018 and September 30, 2017, the Company was contingently liable in the amount of approximately $505.8 million and $503.8 million, respectively, in issued standby letters of credit and $5.5 billion and $5.7 billion, respectively, in issued surety bonds primarily to support project execution. In the ordinary course of business, the Company enters into various agreements providing financial or performance assurances to clients on behalf of certain unconsolidated partnerships, joint ventures and other jointly executed contracts. These agreements are entered into primarily to support the project execution commitments of these entities. In addition, in connection with the investment activities of AECOM Capital, the Company provides guarantees of contractual obligations, including guarantees for completion of projects, repayment of debt, environmental indemnity obligations and other lender required guarantees. DOE Deactivation, Demolition, and Removal Project Washington Group International, an Ohio company (WGI Ohio), an affiliate of URS, executed a cost-reimbursable task order with the Department of Energy (DOE) in 2007 to provide deactivation, demolition and removal services at a New York State project site that, during 2010, experienced contamination and performance issues and remains uncompleted. In February 2011, WGI Ohio and the DOE executed a Task Order Modification that changed some cost-reimbursable contract provisions to at-risk. The Task Order Modification, including subsequent amendments, requires the DOE to pay all project costs up to $106 million, requires WGI Ohio and the DOE to equally share in all project costs incurred from $106 million to $146 million, and requires WGI Ohio to pay all project costs exceeding $146 million. Due to unanticipated requirements and permitting delays by federal and state agencies, as well as delays and related ground stabilization activities caused by Hurricane Irene in 2011, WGI Ohio has been required to perform work outside the scope of the Task Order Modification. In December 2014, WGI Ohio submitted claims against the DOE pursuant to the Contracts Disputes Acts seeking recovery of $103 million, including additional fees on changed work scope. WGI Ohio has incurred and continues to incur additional project costs outside the scope of the contract as a result of differing site and ground conditions and intends to submit additional formal claims against the DOE. Due to significant delays and uncertainties about responsibilities for the scope of remaining work, final project completion costs and other associated costs have exceeded $100 million over the contracted and claimed amounts. WGI Ohio assets and liabilities, including the value of the above costs and claims, were measured at their fair value on October 17, 2014, the date AECOM acquired WGI Ohio’s parent company, see Note 3, which measurement has been reevaluated to account for developments pertaining to this matter. Deconstruction and decommissioning activities are nearing completion and WGI Ohio increased its receivable during the quarter ended June 30, 2018. WGI Ohio can provide no certainty that it will recover the claims submitted against DOE in December 2014, any future claims or any other project costs after December 2014 that WGI Ohio may be obligated to incur including the remaining project completion costs, which could have a material adverse effect on the Company’s results of operations. SR-91 One of the Company’s wholly-owned subsidiaries, URS Corporation, entered into a partial fixed cost and partial time and material design agreement in 2012 with a design build contractor for a state route highway construction project in Riverside County and Orange County, California. On April 1, 2017, URS Corporation filed an $8.2 million amended complaint in the Superior Court of California against the design build contractor for its failure to pay for services performed under the design agreement. On July 3, 2017, the design build contractor filed an amended cross-complaint against URS Corporation and AECOM in Superior Court alleging breaches of contract, negligent interference and professional negligence pertaining to URS Corporation’s performance of design services under the design agreement, seeking purported damages of $70 million. On May 4, 2018, the design build contractor dismissed its claims for negligent interference. On May 24, 2018, URS Corporation filed an $11.9 million second amended complaint in Superior Court against the design build contractor for its failure to pay for services performed under the design agreement. URS Corporation and AECOM cannot provide assurances that URS Corporation will be successful in the recovery of the amounts owed to it under the design agreement or in their defense against the amounts alleged under the cross-complaint that they believe are without merit and that they intend to vigorously defend against. The potential range of loss in excess of any current accrual cannot be reasonably estimated at this time, primarily because the matter involves complex factual and legal issues; there is substantial uncertainty regarding any alleged damages, including due to liability of and payments, by third parties; and the matter is at a discovery stage of litigation. New York Department of Environmental Conservation The following matter is disclosed pursuant to Regulation S-K, Item 103, Instruction 5.C pertaining to a government authority environmental claim exceeding $100,000 against an AECOM affiliate. In September 2017, AECOM USA, Inc., one of the Company’s wholly-owned subsidiaries, was advised by the New York State Department of Environmental Conservation (DEC) of allegations that it committed environmental permit violations pursuant to the New York Environmental Conservation Law (ECL) associated with AECOM USA, Inc.’s oversight of a stream restoration project for Schoharie County which could result in substantial penalties if calculated under the ECL’s maximum civil penalty provisions. AECOM USA, Inc. disputes this claim and intends to continue to defend this matter vigorously; however, AECOM USA, Inc., cannot provide assurances that it will be successful in these efforts. The potential range of loss in excess of any current accrual cannot be reasonably estimated at this time, primarily because the matter involves complex and unique environmental and regulatory issues; the project site involves the oversight and involvement of various local, state and federal government agencies; there is substantial uncertainty regarding any alleged damages; and the matter is in its preliminary stage of the government’s claims and any negotiations of a consent order or other resolution. Illinois Power Generating Company Advatech, LLC, a joint venture 60% owned by AECOM Energy & Construction, Inc., executed a fixed-cost engineering, procurement and construction contract for a flue-gas-desulfurization system at a coal-fired power plant owned by Illinois Power Generating Company, a wholly-owned subsidiary of Dynegy, Inc. (Genco). On September 2, 2016, Genco terminated Advatech’s contract for convenience and Advatech subsequently submitted its final contractual invoice of approximately $81 million. Advatech filed and perfected a mechanics lien on the Genco power plant property on October 17, 2016. On December 9, 2016, Genco filed a voluntary petition under Chapter 11 of the United States Bankruptcy Code in the United States Bankruptcy Court for the Southern District of Texas and its plan of reorganization was approved by the Bankruptcy Court on January 25, 2017 (the Bankruptcy Plan). Advatech’s contractual invoice and mechanics lien were not extinguished per the terms of the Bankruptcy Plan and remain outstanding claims. On March 15, 2017, Advatech filed a demand for arbitration and on July 21, 2017 submitted a Statement of Claim seeking reimbursement of approximately $81 million for Genco’s breach of contract and failure to reimburse Advatech for all of the cost of work performed under the contract. Advatech intends to vigorously prosecute this matter and seeks to collect all claimed amounts under the terms of the contract; however, Advatech cannot provide assurance that it will be successful in these efforts. The resolution of this matter and any potential range of loss in excess of any current accrual cannot be reasonably determined or estimated at this time, primarily because the matter has not been fully arbitrated and presents unique regulatory, bankruptcy and contractual interpretation issues.

Reportable Segments

9 Months Ended

Jun. 30, 2018

Reportable Segments

Reportable Segments

15.Reportable Segments

The Company’s operations are organized into four reportable segments: Design and Consulting Services (DCS), Construction Services (CS), Management Services (MS), and AECOM Capital (ACAP). During the third quarter of fiscal year 2017, operating activities of ACAP achieved a level of significance sufficient to warrant disclosure as a separate reportable segment. Prior to the third quarter of fiscal year 2017, ACAP’s operating results were included in the corporate segment, and comparable periods were reclassified to reflect the change. The Company’s DCS reportable segment delivers planning, consulting, architectural, environmental, and engineering design services to commercial and government clients worldwide. The Company’s CS reportable segment provides construction services primarily in the Americas. The Company’s MS reportable segment provides program and facilities management and maintenance, training, logistics, consulting, technical assistance, and systems integration and information technology services, primarily for agencies of the U.S. government. The Company’s ACAP segment invests in real estate, public-private partnership (P3) and infrastructure projects. These reportable segments are organized by the types of services provided, the differing specialized needs of the respective clients, and how the Company manages its business. The Company has aggregated various operating segments into its reportable segments based on their similar characteristics, including similar long term financial performance, the nature of services provided, internal processes for delivering those services, and types of customers.

The following tables set forth summarized financial information concerning the Company’s reportable segments:

Reportable Segments:	Design and Consulting Services			Construction Services			Management Services			AECOM Capital			Corporate			Total
	(in millions)
Three Months Ended June 30, 2018:
Revenue	$	2,105.4		$	2,106.7		$	935.9		$	—		$	—		$	5,148.0
Gross profit	116.1			9.1			60.0			—			—			185.2
Equity in earnings of joint ventures	4.2			2.3			6.3			—			—			12.8
General and administrative expenses	—			—			—			(3.7		)	(31.4		)	(35.1		)
Loss on disposal activities	—			(2.1		)	—			—			—			(2.1		)
Operating income (loss)	120.3			9.3			66.3			(3.7		)	(31.4		)	160.8

Gross profit as a % of revenue	5.5		%	0.4		%	6.4		%	—			—			3.6		%

Three Months Ended June 30, 2017:
Revenue	$	1,863.5		$	1,841.7		$	856.3		$	—		$	—		$	4,561.5
Gross profit	91.2			26.2			57.8			—			—			175.2
Equity in earnings of joint ventures	2.5			7.0			8.6			48.4			—			66.5
General and administrative expenses	—			—			—			(2.1		)	(31.9		)	(34.0		)
Operating income (loss)	93.7			33.2			66.4			46.3			(31.9		)	207.7

Gross profit as a % of revenue	4.9		%	1.4		%	6.7		%	—			—			3.8		%

Reportable Segments:	Design and Consulting Services			Construction Services			Management Services			AECOM Capital			Corporate			Total
	(in millions)
Nine Months Ended June 30, 2018:
Revenue	$	6,052.0		$	6,120.5		$	2,677.2		$	—		$	—		$	14,849.7
Gross profit	314.2			22.9			125.5			—			—			462.6
Equity in earnings of joint ventures	14.5			16.9			24.2			—			—			55.6
General and administrative expenses	—			—			—			(9.2		)	(90.8		)	(100.0		)
Impairment of assets held for sale, including goodwill	—			(168.2		)	—			—			—			(168.2		)
Loss on disposal activities	—			(2.1		)	—			—			—			(2.1		)
Operating income (loss)	328.7			(130.5		)	149.7			(9.2		)	(90.8		)	247.9

Gross profit as a % of revenue	5.2		%	0.4		%	4.7		%	—			—			3.1		%

Nine Months Ended June 30, 2017:
Revenue	$	5,571.8		$	5,324.6		$	2,450.6		$	—		$	—		$	13,347.0
Gross profit	292.5			60.4			160.7			—			—			513.6
Equity in earnings of joint ventures	12.6			16.6			32.1			48.4			—			109.7
General and administrative expenses	—			—			—			(6.6		)	(89.9		)	(96.5		)
Acquisition and integration expenses	—			—			—			—			(35.4		)	(35.4		)
Gain on disposal activities	0.6			—			—			—			—			0.6
Operating income (loss)	305.7			77.0			192.8			41.8			(125.3		)	492.0

Gross profit as a % of revenue	5.2		%	1.1		%	6.6		%	—			—			3.8		%

Reportable Segments:
Total assets
June 30, 2018	$	7,143.7		$	4,235.9		$	2,682.3		$	211.6		$	453.9		$	14,727.4
September 30, 2017	6,992.6			4,114.5			2,704.6			199.1			386.2			14,397.0

Condensed Consolidating Financial Information

9 Months Ended

Jun. 30, 2018

Condensed Consolidating Financial Information

Condensed Consolidating Financial Information

16.Condensed Consolidating Financial Information

In connection with the registration of the Company’s 2014 Senior Notes that were declared effective by the SEC on September 29, 2015, AECOM became subject to the requirements of Rule 3-10 of Regulation S-X regarding financial statements of guarantors and issuers of guaranteed securities. Both the 2014 Senior Notes and the 2017 Senior Notes are fully and unconditionally guaranteed on a joint and several basis by some of AECOM’s directly and indirectly 100% owned subsidiaries (the Subsidiary Guarantors). Other than customary restrictions imposed by applicable statutes, there are no restrictions on the ability of the Subsidiary Guarantors to transfer funds to AECOM in the form of cash dividends, loans or advances.

The following condensed consolidating financial information, which is presented for AECOM, the Subsidiary Guarantors on a combined basis and AECOM’s non-guarantor subsidiaries on a combined basis, is provided to satisfy the disclosure requirements of Rule 3-10 of Regulation S-X.

Condensed Consolidating Balance Sheets

(unaudited — in millions)

June 30, 2018

	Parent		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations			Total
ASSETS
CURRENT ASSETS:
Total cash and cash equivalents	$	2.0	$	302.8	$	496.6	$	—		$	801.4
Accounts receivable—net	—		2,628.1		2,819.9		—			5,448.0
Intercompany receivable	812.7		82.8		242.5		(1,138.0		)	—
Prepaid expenses and other current assets	82.7		339.7		229.4		—			651.8
Current assets held for sale	—		—		63.3		—			63.3
Income taxes receivable	27.9		—		51.4		—			79.3

TOTAL CURRENT ASSETS	925.3		3,353.4		3,903.1		(1,138.0		)	7,043.8
PROPERTY AND EQUIPMENT—NET	201.8		221.3		184.1		—			607.2
DEFERRED TAX ASSETS—NET	127.8		56.2		156.2		(158.6		)	181.6
INVESTMENTS IN CONSOLIDATED SUBSIDIARIES	6,699.7		2,236.3		—		(8,936.0		)	—
INVESTMENTS IN UNCONSOLIDATED JOINT VENTURES	12.4		55.4		330.3		—			398.1
GOODWILL	—		3,392.7		2,535.3		—			5,928.0
INTANGIBLE ASSETS—NET	—		229.3		113.9		—			343.2
OTHER NON-CURRENT ASSETS	53.7		46.3		125.5		—			225.5

TOTAL ASSETS	$	8,020.7	$	9,590.9	$	7,348.4	$	(10,232.6	)	$	14,727.4


LIABILITIES AND STOCKHOLDERS’ EQUITY
CURRENT LIABILITIES:
Short-term debt	$	6.7	$	—	$	40.7	$	—		$	47.4
Accounts payable	51.1		1,503.2		962.9		—			2,517.2
Accrued expenses and other current liabilities	80.3		1,017.6		1,086.8		—			2,184.7
Income taxes payable	—		—		28.5		—			28.5
Intercompany payable	180.2		830.7		307.7		(1,318.6		)	—
Billings in excess of costs on uncompleted contracts	2.0		359.1		607.7		—			968.8
Current liabilities held for sale	—		—		17.9		—			17.9
Current portion of long-term debt	41.7		26.7		57.2		—			125.6

TOTAL CURRENT LIABILITIES	362.0		3,737.3		3,109.4		(1,318.6		)	5,890.1
OTHER LONG-TERM LIABILITIES	140.0		268.5		447.0		—			855.5
DEFERRED TAX LIABILITY—NET	—		—		173.0		(158.6		)	14.4
NOTE PAYABLE INTERCOMPANY—NON CURRENT	675.8		—		482.3		(1,158.1		)	—
LONG-TERM DEBT	2,856.3		284.8		566.2		—			3,707.3

TOTAL LIABILITIES	4,034.1		4,290.6		4,777.9		(2,635.3		)	10,467.3
TOTAL AECOM STOCKHOLDERS’ EQUITY	3,986.6		5,300.3		2,388.1		(7,597.3		)	4,077.7
Noncontrolling interests	—		—		182.4		—			182.4

TOTAL STOCKHOLDERS’ EQUITY	3,986.6		5,300.3		2,570.5		(7,597.3		)	4,260.1

TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$	8,020.7	$	9,590.9	$	7,348.4	$	(10,232.6	)	$	14,727.4

Condensed Consolidating Balance Sheets

(unaudited - in millions)

September 30, 2017

	Parent		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations			Total
ASSETS
CURRENT ASSETS:
Total cash and cash equivalents	$	32.6	$	254.9	$	514.9	$	—		$	802.4
Accounts receivable—net	—		2,426.4		2,701.3		—			5,127.7
Intercompany receivable	723.6		89.0		183.4		(996.0		)	—
Prepaid expenses and other current assets	67.5		366.5		262.7		—			696.7
Income taxes receivable	4.3		—		51.1		—			55.4

TOTAL CURRENT ASSETS	828.0		3,136.8		3,713.4		(996.0		)	6,682.2
PROPERTY AND EQUIPMENT—NET	160.2		215.0		246.2		—			621.4
DEFERRED TAX ASSETS—NET	239.7		61.7		164.5		(294.6		)	171.3
INVESTMENTS IN CONSOLIDATED SUBSIDIARIES	6,606.2		2,812.8		—		(9,419.0		)	—
INVESTMENTS IN UNCONSOLIDATED JOINT VENTURES	7.2		69.7		287.3		—			364.2
GOODWILL	—		3,392.7		2,600.2		—			5,992.9
INTANGIBLE ASSETS—NET	—		271.6		143.5		—			415.1
OTHER NON-CURRENT ASSETS	8.7		47.4		93.8		—			149.9

TOTAL ASSETS	$	7,850.0	$	10,007.7	$	7,248.9	$	(10,709.6	)	$	14,397.0


LIABILITIES AND STOCKHOLDERS’ EQUITY
CURRENT LIABILITIES:
Short-term debt	$	1.1	$	—	$	0.1	$	—		$	1.2
Accounts payable	33.8		1,301.7		914.4		—			2,249.9
Accrued expenses and other current liabilities	92.2		1,171.8		981.5		—			2,245.5
Income taxes payable	—		8.1		30.1		—			38.2
Intercompany payable	149.2		789.5		159.6		(1,098.3		)	—
Billings in excess of costs on uncompleted contracts	3.4		341.7		557.7		—			902.8
Current portion of long-term debt	110.9		14.9		15.0		—			140.8

TOTAL CURRENT LIABILITIES	390.6		3,627.7		2,658.4		(1,098.3		)	5,578.4
OTHER LONG-TERM LIABILITIES	102.3		290.7		488.3		—			881.3
DEFERRED TAX LIABILITY—NET	—		0.6		314.5		(294.6		)	20.5
NOTE PAYABLE INTERCOMPANY—NON CURRENT	0.1		—		467.2		(467.3		)	—
LONG-TERM DEBT	3,366.9		281.6		53.6		—			3,702.1

TOTAL LIABILITIES	3,859.9		4,200.6		3,982.0		(1,860.2		)	10,182.3
TOTAL AECOM STOCKHOLDERS’ EQUITY	3,990.1		5,807.1		3,048.3		(8,849.4		)	3,996.1
Noncontrolling interests	—		—		218.6		—			218.6

TOTAL STOCKHOLDERS’ EQUITY	3,990.1		5,807.1		3,266.9		(8,849.4		)	4,214.7

TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$	7,850.0	$	10,007.7	$	7,248.9	$	(10,709.6	)	$	14,397.0

Condensed Consolidating Statements of Operations

(unaudited - in millions)

	For the three months ended June 30, 2018
	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
Revenue	$	—		$	2,818.1		$	2,356.8		$	(26.9	)	$	5,148.0

Cost of revenue	—			2,731.8			2,257.9			(26.9		)	4,962.8

Gross profit	—			86.3			98.9			—			185.2

Equity in earnings from subsidiaries	84.8			40.8			—			(125.6		)	—
Equity in earnings of joint ventures	—			6.9			5.9			—			12.8
General and administrative expenses	(31.4		)	—			(3.7		)	—			(35.1		)
Loss on disposal activities	—			—			(2.1		)	—			(2.1		)

Income from operations	53.4			134.0			99.0			(125.6		)	160.8

Other income	0.4			9.6			3.2			(10.5		)	2.7
Interest expense	(49.0		)	(5.6		)	(11.2		)	10.5			(55.3		)

Income before income tax (benefit) expense	4.8			138.0			91.0			(125.6		)	108.2

Income tax (benefit) expense	(56.1		)	54.5			34.7			—			33.1

Net income	60.9			83.5			56.3			(125.6		)	75.1
Noncontrolling interest in income of consolidated subsidiaries, net of tax	—			—			(14.2		)	—			(14.2		)

Net income attributable to AECOM	$	60.9		$	83.5		$	42.1		$	(125.6	)	$	60.9

	For the three months ended June 30, 2017
	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
Revenue	$	—		$	2,604.2		$	2,005.4		$	(48.1	)	$	4,561.5

Cost of revenue	—			2,526.4			1,908.0			(48.1		)	4,386.3

Gross profit	—			77.8			97.4			—			175.2

Equity in earnings from subsidiaries	112.5			18.1			—			(130.6		)	—
Equity in earnings of joint ventures	—			12.5			54.0			—			66.5
General and administrative expenses	(31.9		)	—			(2.1		)	—			(34.0		)

Income from operations	80.6			108.4			149.3			(130.6		)	207.7

Other income	0.8			7.6			2.4			(8.7		)	2.1
Interest expense	(52.6		)	(6.7		)	(11.0		)	8.7			(61.6		)

Income before income tax (benefit) expense	28.8			109.3			140.7			(130.6		)	148.2

Income tax (benefit) expense	(72.4		)	37.4			47.1			—			12.1

Net income	101.2			71.9			93.6			(130.6		)	136.1
Noncontrolling interest in income of consolidated subsidiaries, net of tax	—			—			(34.8		)	—			(34.8		)

Net income attributable to AECOM	$	101.2		$	71.9		$	58.8		$	(130.6	)	$	101.3

Condensed Consolidating Statements of Operations

(unaudited - in millions)

	For the nine months ended June 30, 2018
	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
Revenue	$	—		$	8,230.1		$	6,688.3		$	(68.7	)	$	14,849.7

Cost of revenue	—			7,950.0			6,505.8			(68.7		)	14,387.1

Gross profit	—			280.1			182.5			—			462.6

Equity in earnings from subsidiaries	272.7			103.8			—			(376.5		)	—
Equity in earnings of joint ventures	—			30.9			24.7			—			55.6
General and administrative expenses	(90.8		)	—			(9.2		)	—			(100.0		)
Impairment of assets held for sale, including goodwill	—			—			(168.2		)	—			(168.2		)
Loss on disposal activities	—			—			(2.1		)	—			(2.1		)

Income from operations	181.9			414.8			27.7			(376.5		)	247.9

Other income	10.8			20.1			9.9			(23.3		)	17.5
Interest expense	(194.3		)	(14.5		)	(26.5		)	23.3			(212.0		)

(Loss) income before income tax (benefit) expense	(1.6		)	420.4			11.1			(376.5		)	53.4

Income tax (benefit) expense	(54.1		)	149.4			(133.7		)	—			(38.4		)

Net income	52.5			271.0			144.8			(376.5		)	91.8
Noncontrolling interest in income of consolidated subsidiaries, net of tax	—			—			(39.3		)	—			(39.3		)

Net income attributable to AECOM	$	52.5		$	271.0		$	105.5		$	(376.5	)	$	52.5

	For the nine months ended June 30, 2017
	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
Revenue	$	—		$	7,699.4		$	5,699.9		$	(52.3	)	$	13,347.0

Cost of revenue	—			7,410.3			5,475.4			(52.3		)	12,833.4

Gross profit	—			289.1			224.5			—			513.6

Equity in earnings from subsidiaries	396.1			149.3			—			(545.4		)	—
Equity in earnings of joint ventures	—			34.5			75.2			—			109.7
General and administrative expenses	(89.9		)	—			(6.6		)	—			(96.5		)
Acquisition and integration expenses	(35.4		)	—			—			—			(35.4		)
Gain on disposal activities	—			—			0.6			—			0.6

Income from operations	270.8			472.9			293.7			(545.4		)	492.0

Other income	1.7			23.6			6.8			(27.9		)	4.2
Interest expense	(155.5		)	(18.3		)	(31.1		)	27.9			(177.0		)

Income before income tax (benefit) expense	117.0			478.2			269.4			(545.4		)	319.2

Income tax (benefit) expense	(133.8		)	114.8			20.5			—			1.5

Net income	250.8			363.4			248.9			(545.4		)	317.7
Noncontrolling interest in income of consolidated subsidiaries, net of tax	—			—			(66.8		)	—			(66.8		)

Net income attributable to AECOM	$	250.8		$	363.4		$	182.1		$	(545.4	)	$	250.9

Consolidating Statements of Comprehensive Income (Loss)

(unaudited - in millions)

	For the three months ended June 30, 2018
	Parent		Guarantor Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Total
Net income	$	60.9	$	83.5	$	56.3		$	(125.6	)	$	75.1
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) on derivatives, net of tax	0.9		—		(0.2		)	—			0.7
Foreign currency translation adjustments	—		—		(67.2		)	—			(67.2		)
Pension adjustments, net of tax	0.3		—		14.8			—			15.1

Other comprehensive income (loss), net of tax	1.2		—		(52.6		)	—			(51.4		)

Comprehensive income, net of tax	62.1		83.5		3.7			(125.6		)	23.7
Noncontrolling interests in comprehensive income of consolidated subsidiaries, net of tax	—		—		(14.0		)	—			(14.0		)

Comprehensive income (loss) attributable to AECOM, net of tax	$	62.1	$	83.5	$	(10.3	)	$	(125.6	)	$	9.7

	For the three months ended June 30, 2017
	Parent		Guarantor Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Total
Net income	$	101.2	$	71.9	$	93.6		$	(130.6	)	$	136.1
Other comprehensive income, net of tax:
Net unrealized gain on derivatives, net of tax	0.5		—		0.1			—			0.6
Foreign currency translation adjustments	—		—		46.2			—			46.2
Pension adjustments, net of tax	0.6		—		(7.2		)	—			(6.6		)

Other comprehensive income, net of tax	1.1		—		39.1			—			40.2

Comprehensive income, net of tax	102.3		71.9		132.7			(130.6		)	176.3
Noncontrolling interests in comprehensive income of consolidated subsidiaries, net of tax	—		—		(35.1		)	—			(35.1		)

Comprehensive income attributable to AECOM, net of tax	$	102.3	$	71.9	$	97.6		$	(130.6	)	$	141.2

Consolidating Statements of Comprehensive Income (Loss)

(unaudited - in millions)

	For the nine months ended June 30, 2018
	Parent		Guarantor Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Total
Net income	$	52.5	$	271.0	$	144.8		$	(376.5	)	$	91.8
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) on derivatives, net of tax	1.5		—		(1.7		)	—			(0.2		)
Foreign currency translation adjustments	—		—		(57.7		)	—			(57.7		)
Pension adjustments, net of tax	1.8		—		(0.3		)	—			1.5

Other comprehensive income (loss), net of tax	3.3		—		(59.7		)	—			(56.4		)

Comprehensive income, net of tax	55.8		271.0		85.1			(376.5		)	35.4
Noncontrolling interests in comprehensive income of consolidated subsidiaries, net of tax	—		—		(40.5		)	—			(40.5		)

Comprehensive income (loss) attributable to AECOM, net of tax	$	55.8	$	271.0	$	44.6		$	(376.5	)	$	(5.1	)

	For the nine months ended June 30, 2017
	Parent		Guarantor Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Total
Net income	$	250.8	$	363.4	$	248.9		$	(545.4	)	$	317.7
Other comprehensive income, net of tax:
Net unrealized gain (loss) on derivatives, net of tax	4.6		—		(0.3		)	—			4.3
Foreign currency translation adjustments	—		—		13.2			—			13.2
Pension adjustments, net of tax	1.9		—		6.9			—			8.8

Other comprehensive income, net of tax	6.5		—		19.8			—			26.3

Comprehensive income, net of tax	257.3		363.4		268.7			(545.4		)	344.0
Noncontrolling interests in comprehensive income of consolidated subsidiaries, net of tax	—		—		(67.2		)	—			(67.2		)

Comprehensive income attributable to AECOM, net of tax	$	257.3	$	363.4	$	201.5		$	(545.4	)	$	276.8

Condensed Consolidating Statements of Cash Flows

(unaudited - in millions)

	For the nine months ended June 30, 2018
	Parent			Guarantor Subsidiaries			Non- Guarantor Subsidiaries			Eliminations			Total

CASH FLOWS FROM OPERATING ACTIVITIES	$	(59.9	)	$	257.3		$	45.3		$	—		$	242.7
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from purchase price adjustment to business acquisition	—			—			2.2			—			2.2
Cash acquired from consolidation of joint venture	—			—			7.6			—			7.6
Proceeds from disposal of business, net of cash disposed	—			—			19.5			—			19.5
Net investment in unconsolidated joint ventures	(5.2		)	(9.4		)	(48.7		)	—			(63.3		)
Net payments for purchase of investments	—			—			(17.5		)	—			(17.5		)
Payments for capital expenditures, net of disposals	(19.8		)	(34.2		)	(11.6		)	—			(65.6		)
Net investment in intercompany notes	(85.4		)	(545.3		)	(73.8		)	704.5			—
Other intercompany investing activities	109.9			504.9			—			(614.8		)	—

Net cash used in investing activities	(0.5		)	(84.0		)	(122.3		)	89.7			(117.1		)

CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings under credit agreements	6,701.2			—			737.9			—			7,439.1
Repayments of borrowings under credit agreements	(6,509.5		)	(14.0		)	(131.4		)	—			(6,654.9		)
Redemption of unsecured senior notes	(800.0		)	—			—			—			(800.0		)
Prepayment premium on redemption of unsecured senior notes	(34.5		)	—			—			—			(34.5		)
Cash paid for debt issuance costs	(10.7		)	—			—			—			(10.7		)
Proceeds from issuance of common stock	27.3			—			—			—			27.3
Proceeds from exercise of stock options	3.2			—			—			—			3.2
Payments to repurchase common stock	(29.3		)	—			—			—			(29.3		)
Net distributions to noncontrolling interests	—			—			(72.7		)	—			(72.7		)
Other financing activities	8.8			(26.6		)	26.5			—			8.7
Net borrowings (repayments) on intercompany notes	673.3			(4.8		)	36.0			(704.5		)	—
Other intercompany financing activities	—			(80.0		)	(534.8		)	614.8			—

Net cash provided by (used in) financing activities	29.8			(125.4		)	61.5			(89.7		)	(123.8		)

EFFECT OF EXCHANGE RATE CHANGES ON CASH	—			—			(2.8		)	—			(2.8		)
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(30.6		)	47.9			(18.3		)	—			(1.0		)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	32.6			254.9			514.9			—			802.4

CASH AND CASH EQUIVALENTS AT END OF YEAR	$	2.0		$	302.8		$	496.6		$	—		$	801.4

Condensed Consolidating Statements of Cash Flows

(unaudited - in millions)

	For the nine months ended June 30, 2017
	Parent			Guarantor Subsidiaries			Non- Guarantor Subsidiaries			Eliminations			Total

CASH FLOWS FROM OPERATING ACTIVITIES	$	(123.0	)	$	548.3		$	20.1		$	—		$	445.4
CASH FLOWS FROM INVESTING ACTIVITIES:
Payment for business acquisitions, net of cash acquired	—			—			(1.7		)	—			(1.7		)
Proceeds from disposal of business, net of cash disposed	—			—			2.2			—			2.2
Net investment in unconsolidated joint ventures	—			0.3			(11.1		)	—			(10.8		)
Net proceeds from sale of investments	—			—			0.7			—			0.7
Payments for capital expenditures, net of disposals	(17.8		)	(24.5		)	(16.2		)	—			(58.5		)
Net investment in intercompany notes	(2.1		)	(16.0		)	(7.0		)	25.1			—
Other intercompany investing activities	118.4			(68.4		)	—			(50.0		)	—

Net cash provided by (used in) investing activities	98.5			(108.6		)	(33.1		)	(24.9		)	(68.1		)

CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings under credit agreements	4,630.3			—			8.4			—			4,638.7
Repayments of borrowings under credit agreements	(5,580.0		)	(25.9		)	(29.3		)	—			(5,635.2		)
Proceeds from issuance of unsecured senior notes	1,000.0			—			—			—			1,000.0
Redemption of unsecured senior notes	—			(179.2		)	—			—			(179.2		)
Cash paid for debt issuance costs	(13.1		)	—			—			—			(13.1		)
Proceeds from issuance of common stock	24.7			—			—			—			24.7
Proceeds from exercise of stock options	3.6			—			—			—			3.6
Payments to repurchase common stock	(22.3		)	—			—			—			(22.3		)
Net distributions to noncontrolling interests	—			—			(44.6		)	—			(44.6		)
Other financing activities	(17.0		)	(65.4		)	53.0			—			(29.4		)
Net borrowings (repayments) on intercompany notes	24.3			(17.4		)	18.2			(25.1		)	—
Other intercompany financing activities	—			(149.2		)	99.2			50.0			—

Net cash provided by (used in) financing activities	50.5			(437.1		)	104.9			24.9			(256.8		)

EFFECT OF EXCHANGE RATE CHANGES ON CASH	—			—			(0.2		)	—			(0.2		)
NET INCREASE IN CASH AND CASH EQUIVALENTS	26.0			2.6			91.7			—			120.3
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	1.8			196.3			494.0			—			692.1

CASH AND CASH EQUIVALENTS AT END OF YEAR	$	27.8		$	198.9		$	585.7		$	—		$	812.4

Business Acquisitions, Goodwill and Intangible Assets (Tables)

9 Months Ended

Jun. 30, 2018

Business Acquisitions, Goodwill and Intangible Assets

Schedule of acquisition and integration expenses

	Nine months ended June 30, 2017
	(in millions)
Severance and personnel costs	$	29.9
Professional service, real estate-related, and other expenses	5.5

Total	$	35.4

Schedule of changes in the carrying value of goodwill by reportable segment

	September 30, 2017		Measurement Period Adjustments		Impairment			Foreign Exchange Impact			June 30, 2018
	(in millions)
Design and Consulting Services	$	3,218.9	$	—	$	—		$	(24.1	)	$	3,194.8
Construction Services	1,049.9		91.0		(125.4		)	(8.7		)	1,006.8
Management Services	1,724.1		—		—			2.3			1,726.4

Total	$	5,992.9	$	91.0	$	(125.4	)	$	(30.5	)	$	5,928.0

Schedule of finite-lived intangible assets by major class

	June 30, 2018							September 30, 2017
	Gross Amount		Accumulated Amortization			Intangible Assets, Net		Gross Amount		Accumulated Amortization			Intangible Assets, Net		Amortization Period
	(in millions)														(years)
Backlog and customer relationships	$	1,286.7	$	(945.0	)	$	341.7	$	1,283.6	$	(870.2	)	$	413.4	1 - 11
Trademark / tradename	18.3		(16.8		)	1.5		18.3		(16.6		)	1.7		0.3 - 2

Total	$	1,305.0	$	(961.8	)	$	343.2	$	1,301.9	$	(886.8	)	$	415.1

Schedule of estimated future amortization expense of intangible assets

Fiscal Year	(in millions)
2018 (three months remaining)	$	22.7
2019	83.9
2020	70.0
2021	56.9
2022	44.1
Thereafter	65.6

Total	$	343.2

Accounts Receivable - Net (Tables)

9 Months Ended

Jun. 30, 2018

Accounts Receivable - Net

Schedule of net accounts receivable

	June 30, 2018			September 30, 2017
	(in millions)
Billed	$	2,560.6		$	2,317.8
Unbilled	2,295.0			2,293.5
Contract retentions	638.9			568.6

Total accounts receivable—gross	5,494.5			5,179.9
Allowance for doubtful accounts	(46.5		)	(52.2		)

Total accounts receivable—net	$	5,448.0		$	5,127.7

Joint Ventures and Variable Interest Entities (Tables)

9 Months Ended

Jun. 30, 2018

Joint Ventures and Variable Interest Entities

Summary of unaudited financial information of the consolidated joint ventures

	June 30, 2018		September 30, 2017
	(in millions)
Current assets	$	906.0	$	832.1
Non-current assets	198.4		188.8

Total assets	$	1,104.4	$	1,020.9


Current liabilities	$	638.2	$	524.9
Non-current liabilities	12.3		12.4

Total liabilities	650.5		537.3
Total AECOM equity	272.1		274.7
Noncontrolling interests	181.8		208.9

Total owners’ equity	453.9		483.6

Total liabilities and owners’ equity	$	1,104.4	$	1,020.9

Summary of unaudited financial information of the unconsolidated joint ventures

	June 30, 2018		September 30, 2017
	(in millions)
Current assets	$	1,759.0	$	1,912.2
Non-current assets	896.5		749.8

Total assets	$	2,655.5	$	2,662.0


Current liabilities	$	1,381.6	$	1,570.2
Non-current liabilities	223.0		185.1

Total liabilities	1,604.6		1,755.3
Joint ventures’ equity	1,050.9		906.7

Total liabilities and joint ventures’ equity	$	2,655.5	$	2,662.0


AECOM’s investment in joint ventures	$	398.1	$	364.2

	Nine Months Ended
	June 30, 2018		June 30, 2017
	(in millions)
Revenue	$	4,041.7	$	4,077.7
Cost of revenue	3,843.7		3,862.9

Gross profit	$	198.0	$	214.8

Net income	$	191.8	$	205.3

Summary of AECOM's equity in earnings of unconsolidated joint ventures

	Nine Months Ended
	June 30, 2018		June 30, 2017
	(in millions)
Pass through joint ventures	$	29.8	$	27.5
Other joint ventures	25.8		82.2

Total	$	55.6	$	109.7

Pension Benefit Obligations (Tables)

9 Months Ended

Jun. 30, 2018

Pension Benefit Obligations

Components of net periodic cost for the Company's pension plans

	Three Months Ended												Nine Months Ended
	June 30, 2018						June 30, 2017						June 30, 2018						June 30, 2017
	U.S.			Int’l			U.S.			Int’l			U.S.			Int’l			U.S.			Int’l
	(in millions)
Components of net periodic (benefit) cost:
Service costs	$	1.3		$	0.2		$	1.0		$	0.3		$	3.7		$	0.8		$	3.2		$	0.9
Interest cost on projected benefit obligation	5.1			8.1			4.8			7.1			15.5			24.3			14.4			21.0
Expected return on plan assets	(7.9		)	(10.8		)	(7.7		)	(10.5		)	(23.6		)	(32.6		)	(23.2		)	(30.8		)
Amortization of prior service cost	—			—			—			—			—			(0.1		)	—			(0.1		)
Amortization of net loss	1.0			2.0			1.0			3.3			3.0			6.2			3.2			9.7
Settlement loss recognized	—			—			—			—			—			0.2			—			—

Net periodic (benefit) cost	$	(0.5	)	$	(0.5	)	$	(0.9	)	$	0.2		$	(1.4	)	$	(1.2	)	$	(2.4	)	$	0.7

Debt (Tables)

9 Months Ended

Jun. 30, 2018

Debt

Schedule of debt

	June 30, 2018			September 30, 2017
	(in millions)
2014 Credit Agreement	$	1,667.7		$	908.7
2014 Senior Notes	800.0			1,600.0
2017 Senior Notes	1,000.0			1,000.0
URS Senior Notes	247.8			247.7
Other debt	214.3			140.0

Total debt	3,929.8			3,896.4
Less: Current portion of debt and short-term borrowings	(173.0		)	(142.0		)
Less: Unamortized debt issuance costs	(49.5		)	(52.3		)

Long-term debt	$	3,707.3		$	3,702.1

Schedule of maturities of debt

Fiscal Year
2018 (three months remaining)	$	72.7
2019	122.2
2020	86.9
2021	485.8
2022	301.0
Thereafter	2,861.2

Total	$	3,929.8

Derivative Financial Instruments and Fair Value Measurements (Tables)

9 Months Ended

Jun. 30, 2018

Derivative Financial Instruments and Fair Value Measurements

Notional principle, fixed rates and related expiration dates of outstanding interest rate swap agreements

June 30, 2018
Notional Amount Currency	Notional Amount (in millions)	Fixed Rate		Expiration Date
USD	300.0	1.54	%	September 2018
AUD	200.0	2.19	%	February 2021
CAD	400.0	2.49	%	September 2022
USD	200.0	2.60	%	February 2023

September 30, 2017
Notional Amount Currency	Notional Amount (in millions)	Fixed Rate		Expiration Date
USD	300.0	1.63	%	June 2018
USD	300.0	1.54	%	September 2018

Share-based Payments (Tables)

9 Months Ended

Jun. 30, 2018

Share-based Payments

Schedule of stock option activity

Stock option activity for the nine months ended June 30 was as follows:

	2018				2017
	Shares of stock under options		Weighted average exercise price		Shares of stock under options		Weighted average exercise price
	(in millions)				(in millions)
Outstanding at September 30, prior year	0.7		$	31.11	0.9		$	30.36
Options granted	—		—		—		—
Options exercised	(0.1	)	27.79		(0.2	)	26.42
Options forfeited or expired	—		—		—		—

Outstanding at June 30	0.6		31.62		0.7		31.11


Vested and expected to vest in the future as of June 30	0.6		$	31.62	0.7		$	31.11

Earnings Per Share (Tables)

9 Months Ended

Jun. 30, 2018

Earnings Per Share

Reconciliation of the denominators for basic and diluted EPS

	Three Months Ended		Nine Months Ended
	June 30, 2018	June 30, 2017	June 30, 2018	June 30, 2017
	(in millions)
Denominator for basic earnings per share	160.4	155.8	159.3	155.1
Potential common shares	2.8	3.0	3.1	3.4

Denominator for diluted earnings per share	163.2	158.8	162.4	158.5

Other Financial Information (Tables)

9 Months Ended

Jun. 30, 2018

Other Financial Information

Schedule of accrued expenses and other current liabilities

	June 30, 2018		September 30, 2017
	(in millions)
Accrued salaries and benefits	$	938.9	$	1,018.5
Accrued contract costs	853.3		911.9
Other accrued expenses	392.5		315.1

	$	2,184.7	$	2,245.5

Reclassifications out of Accumulated Other Comprehensive Loss (Tables)

9 Months Ended

Jun. 30, 2018

Reclassifications out of Accumulated Other Comprehensive Loss

Schedule of accumulated balances and reporting period activities related to reclassifications out of accumulated other comprehensive loss

	Pension Related Adjustments			Foreign Currency Translation Adjustments			Loss on Derivative Instruments			Accumulated Other Comprehensive Loss
Balances at March 31, 2018	$	(295.5	)	$	(410.2	)	$	(1.3	)	$	(707.0	)
Other comprehensive income (loss) before reclassification	13.0			(67.1		)	0.4			(53.7		)
Amounts reclassified from accumulated other comprehensive loss	2.2			—			0.2			2.4

Balances at June 30, 2018	$	(280.3	)	$	(477.3	)	$	(0.7	)	$	(758.3	)

	Pension Related Adjustments			Foreign Currency Translation Adjustments			Loss on Derivative Instruments			Accumulated Other Comprehensive Loss
Balances at March 31, 2017	$	(353.5	)	$	(516.8	)	$	(1.3	)	$	(871.6	)
Other comprehensive (loss) income before reclassification	(9.8		)	46.0			(0.1		)	36.1
Amounts reclassified from accumulated other comprehensive loss	3.2			—			0.6			3.8

Balances at June 30, 2017	$	(360.1	)	$	(470.8	)	$	(0.8	)	$	(831.7	)

	Pension Related Adjustments			Foreign Currency Translation Adjustments			Loss on Derivative Instruments			Accumulated Other Comprehensive Loss
Balances at September 30, 2017	$	(281.9	)	$	(418.4	)	$	(0.4	)	$	(700.7	)
Other comprehensive loss before reclassification	(5.8		)	(58.9		)	(0.7		)	(65.4		)
Amounts reclassified from accumulated other comprehensive loss	7.4			—			0.4			7.8

Balances at June 30, 2018	$	(280.3	)	$	(477.3	)	$	(0.7	)	$	(758.3	)

	Pension Related Adjustments			Foreign Currency Translation Adjustments			Loss on Derivative Instruments			Accumulated Other Comprehensive Loss
Balances at September 30, 2016	$	(368.9	)	$	(483.7	)	$	(5.0	)	$	(857.6	)
Other comprehensive (loss) income before reclassification	(0.7		)	12.9			2.1			14.3
Amounts reclassified from accumulated other comprehensive income	9.5			—			2.1			11.6

Balances at June 30, 2017	$	(360.1	)	$	(470.8	)	$	(0.8	)	$	(831.7	)

Reportable Segments (Tables)

9 Months Ended

Jun. 30, 2018

Reportable Segments

Summarized financial information concerning the Company's reportable segments

Reportable Segments:	Design and Consulting Services			Construction Services			Management Services			AECOM Capital			Corporate			Total
	(in millions)
Three Months Ended June 30, 2018:
Revenue	$	2,105.4		$	2,106.7		$	935.9		$	—		$	—		$	5,148.0
Gross profit	116.1			9.1			60.0			—			—			185.2
Equity in earnings of joint ventures	4.2			2.3			6.3			—			—			12.8
General and administrative expenses	—			—			—			(3.7		)	(31.4		)	(35.1		)
Loss on disposal activities	—			(2.1		)	—			—			—			(2.1		)
Operating income (loss)	120.3			9.3			66.3			(3.7		)	(31.4		)	160.8

Gross profit as a % of revenue	5.5		%	0.4		%	6.4		%	—			—			3.6		%

Three Months Ended June 30, 2017:
Revenue	$	1,863.5		$	1,841.7		$	856.3		$	—		$	—		$	4,561.5
Gross profit	91.2			26.2			57.8			—			—			175.2
Equity in earnings of joint ventures	2.5			7.0			8.6			48.4			—			66.5
General and administrative expenses	—			—			—			(2.1		)	(31.9		)	(34.0		)
Operating income (loss)	93.7			33.2			66.4			46.3			(31.9		)	207.7

Gross profit as a % of revenue	4.9		%	1.4		%	6.7		%	—			—			3.8		%

Reportable Segments:	Design and Consulting Services			Construction Services			Management Services			AECOM Capital			Corporate			Total
	(in millions)
Nine Months Ended June 30, 2018:
Revenue	$	6,052.0		$	6,120.5		$	2,677.2		$	—		$	—		$	14,849.7
Gross profit	314.2			22.9			125.5			—			—			462.6
Equity in earnings of joint ventures	14.5			16.9			24.2			—			—			55.6
General and administrative expenses	—			—			—			(9.2		)	(90.8		)	(100.0		)
Impairment of assets held for sale, including goodwill	—			(168.2		)	—			—			—			(168.2		)
Loss on disposal activities	—			(2.1		)	—			—			—			(2.1		)
Operating income (loss)	328.7			(130.5		)	149.7			(9.2		)	(90.8		)	247.9

Gross profit as a % of revenue	5.2		%	0.4		%	4.7		%	—			—			3.1		%

Nine Months Ended June 30, 2017:
Revenue	$	5,571.8		$	5,324.6		$	2,450.6		$	—		$	—		$	13,347.0
Gross profit	292.5			60.4			160.7			—			—			513.6
Equity in earnings of joint ventures	12.6			16.6			32.1			48.4			—			109.7
General and administrative expenses	—			—			—			(6.6		)	(89.9		)	(96.5		)
Acquisition and integration expenses	—			—			—			—			(35.4		)	(35.4		)
Gain on disposal activities	0.6			—			—			—			—			0.6
Operating income (loss)	305.7			77.0			192.8			41.8			(125.3		)	492.0

Gross profit as a % of revenue	5.2		%	1.1		%	6.6		%	—			—			3.8		%

Reportable Segments:
Total assets
June 30, 2018	$	7,143.7		$	4,235.9		$	2,682.3		$	211.6		$	453.9		$	14,727.4
September 30, 2017	6,992.6			4,114.5			2,704.6			199.1			386.2			14,397.0

Condensed Consolidating Financial Information (Tables)

9 Months Ended

Jun. 30, 2018

Condensed Consolidating Financial Information

Schedule of Condensed Consolidating Balance Sheets

Condensed Consolidating Balance Sheets

(unaudited — in millions)

June 30, 2018

	Parent		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations			Total
ASSETS
CURRENT ASSETS:
Total cash and cash equivalents	$	2.0	$	302.8	$	496.6	$	—		$	801.4
Accounts receivable—net	—		2,628.1		2,819.9		—			5,448.0
Intercompany receivable	812.7		82.8		242.5		(1,138.0		)	—
Prepaid expenses and other current assets	82.7		339.7		229.4		—			651.8
Current assets held for sale	—		—		63.3		—			63.3
Income taxes receivable	27.9		—		51.4		—			79.3

TOTAL CURRENT ASSETS	925.3		3,353.4		3,903.1		(1,138.0		)	7,043.8
PROPERTY AND EQUIPMENT—NET	201.8		221.3		184.1		—			607.2
DEFERRED TAX ASSETS—NET	127.8		56.2		156.2		(158.6		)	181.6
INVESTMENTS IN CONSOLIDATED SUBSIDIARIES	6,699.7		2,236.3		—		(8,936.0		)	—
INVESTMENTS IN UNCONSOLIDATED JOINT VENTURES	12.4		55.4		330.3		—			398.1
GOODWILL	—		3,392.7		2,535.3		—			5,928.0
INTANGIBLE ASSETS—NET	—		229.3		113.9		—			343.2
OTHER NON-CURRENT ASSETS	53.7		46.3		125.5		—			225.5

TOTAL ASSETS	$	8,020.7	$	9,590.9	$	7,348.4	$	(10,232.6	)	$	14,727.4


LIABILITIES AND STOCKHOLDERS’ EQUITY
CURRENT LIABILITIES:
Short-term debt	$	6.7	$	—	$	40.7	$	—		$	47.4
Accounts payable	51.1		1,503.2		962.9		—			2,517.2
Accrued expenses and other current liabilities	80.3		1,017.6		1,086.8		—			2,184.7
Income taxes payable	—		—		28.5		—			28.5
Intercompany payable	180.2		830.7		307.7		(1,318.6		)	—
Billings in excess of costs on uncompleted contracts	2.0		359.1		607.7		—			968.8
Current liabilities held for sale	—		—		17.9		—			17.9
Current portion of long-term debt	41.7		26.7		57.2		—			125.6

TOTAL CURRENT LIABILITIES	362.0		3,737.3		3,109.4		(1,318.6		)	5,890.1
OTHER LONG-TERM LIABILITIES	140.0		268.5		447.0		—			855.5
DEFERRED TAX LIABILITY—NET	—		—		173.0		(158.6		)	14.4
NOTE PAYABLE INTERCOMPANY—NON CURRENT	675.8		—		482.3		(1,158.1		)	—
LONG-TERM DEBT	2,856.3		284.8		566.2		—			3,707.3

TOTAL LIABILITIES	4,034.1		4,290.6		4,777.9		(2,635.3		)	10,467.3
TOTAL AECOM STOCKHOLDERS’ EQUITY	3,986.6		5,300.3		2,388.1		(7,597.3		)	4,077.7
Noncontrolling interests	—		—		182.4		—			182.4

TOTAL STOCKHOLDERS’ EQUITY	3,986.6		5,300.3		2,570.5		(7,597.3		)	4,260.1

TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$	8,020.7	$	9,590.9	$	7,348.4	$	(10,232.6	)	$	14,727.4

Condensed Consolidating Balance Sheets

(unaudited - in millions)

September 30, 2017

	Parent		Guarantor Subsidiaries		Non-Guarantor Subsidiaries		Eliminations			Total
ASSETS
CURRENT ASSETS:
Total cash and cash equivalents	$	32.6	$	254.9	$	514.9	$	—		$	802.4
Accounts receivable—net	—		2,426.4		2,701.3		—			5,127.7
Intercompany receivable	723.6		89.0		183.4		(996.0		)	—
Prepaid expenses and other current assets	67.5		366.5		262.7		—			696.7
Income taxes receivable	4.3		—		51.1		—			55.4

TOTAL CURRENT ASSETS	828.0		3,136.8		3,713.4		(996.0		)	6,682.2
PROPERTY AND EQUIPMENT—NET	160.2		215.0		246.2		—			621.4
DEFERRED TAX ASSETS—NET	239.7		61.7		164.5		(294.6		)	171.3
INVESTMENTS IN CONSOLIDATED SUBSIDIARIES	6,606.2		2,812.8		—		(9,419.0		)	—
INVESTMENTS IN UNCONSOLIDATED JOINT VENTURES	7.2		69.7		287.3		—			364.2
GOODWILL	—		3,392.7		2,600.2		—			5,992.9
INTANGIBLE ASSETS—NET	—		271.6		143.5		—			415.1
OTHER NON-CURRENT ASSETS	8.7		47.4		93.8		—			149.9

TOTAL ASSETS	$	7,850.0	$	10,007.7	$	7,248.9	$	(10,709.6	)	$	14,397.0


LIABILITIES AND STOCKHOLDERS’ EQUITY
CURRENT LIABILITIES:
Short-term debt	$	1.1	$	—	$	0.1	$	—		$	1.2
Accounts payable	33.8		1,301.7		914.4		—			2,249.9
Accrued expenses and other current liabilities	92.2		1,171.8		981.5		—			2,245.5
Income taxes payable	—		8.1		30.1		—			38.2
Intercompany payable	149.2		789.5		159.6		(1,098.3		)	—
Billings in excess of costs on uncompleted contracts	3.4		341.7		557.7		—			902.8
Current portion of long-term debt	110.9		14.9		15.0		—			140.8

TOTAL CURRENT LIABILITIES	390.6		3,627.7		2,658.4		(1,098.3		)	5,578.4
OTHER LONG-TERM LIABILITIES	102.3		290.7		488.3		—			881.3
DEFERRED TAX LIABILITY—NET	—		0.6		314.5		(294.6		)	20.5
NOTE PAYABLE INTERCOMPANY—NON CURRENT	0.1		—		467.2		(467.3		)	—
LONG-TERM DEBT	3,366.9		281.6		53.6		—			3,702.1

TOTAL LIABILITIES	3,859.9		4,200.6		3,982.0		(1,860.2		)	10,182.3
TOTAL AECOM STOCKHOLDERS’ EQUITY	3,990.1		5,807.1		3,048.3		(8,849.4		)	3,996.1
Noncontrolling interests	—		—		218.6		—			218.6

TOTAL STOCKHOLDERS’ EQUITY	3,990.1		5,807.1		3,266.9		(8,849.4		)	4,214.7

TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$	7,850.0	$	10,007.7	$	7,248.9	$	(10,709.6	)	$	14,397.0

Schedule of Condensed Consolidating Statements of Operations

Condensed Consolidating Statements of Operations

(unaudited - in millions)

	For the three months ended June 30, 2018
	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
Revenue	$	—		$	2,818.1		$	2,356.8		$	(26.9	)	$	5,148.0

Cost of revenue	—			2,731.8			2,257.9			(26.9		)	4,962.8

Gross profit	—			86.3			98.9			—			185.2

Equity in earnings from subsidiaries	84.8			40.8			—			(125.6		)	—
Equity in earnings of joint ventures	—			6.9			5.9			—			12.8
General and administrative expenses	(31.4		)	—			(3.7		)	—			(35.1		)
Loss on disposal activities	—			—			(2.1		)	—			(2.1		)

Income from operations	53.4			134.0			99.0			(125.6		)	160.8

Other income	0.4			9.6			3.2			(10.5		)	2.7
Interest expense	(49.0		)	(5.6		)	(11.2		)	10.5			(55.3		)

Income before income tax (benefit) expense	4.8			138.0			91.0			(125.6		)	108.2

Income tax (benefit) expense	(56.1		)	54.5			34.7			—			33.1

Net income	60.9			83.5			56.3			(125.6		)	75.1
Noncontrolling interest in income of consolidated subsidiaries, net of tax	—			—			(14.2		)	—			(14.2		)

Net income attributable to AECOM	$	60.9		$	83.5		$	42.1		$	(125.6	)	$	60.9

	For the three months ended June 30, 2017
	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
Revenue	$	—		$	2,604.2		$	2,005.4		$	(48.1	)	$	4,561.5

Cost of revenue	—			2,526.4			1,908.0			(48.1		)	4,386.3

Gross profit	—			77.8			97.4			—			175.2

Equity in earnings from subsidiaries	112.5			18.1			—			(130.6		)	—
Equity in earnings of joint ventures	—			12.5			54.0			—			66.5
General and administrative expenses	(31.9		)	—			(2.1		)	—			(34.0		)

Income from operations	80.6			108.4			149.3			(130.6		)	207.7

Other income	0.8			7.6			2.4			(8.7		)	2.1
Interest expense	(52.6		)	(6.7		)	(11.0		)	8.7			(61.6		)

Income before income tax (benefit) expense	28.8			109.3			140.7			(130.6		)	148.2

Income tax (benefit) expense	(72.4		)	37.4			47.1			—			12.1

Net income	101.2			71.9			93.6			(130.6		)	136.1
Noncontrolling interest in income of consolidated subsidiaries, net of tax	—			—			(34.8		)	—			(34.8		)

Net income attributable to AECOM	$	101.2		$	71.9		$	58.8		$	(130.6	)	$	101.3

Condensed Consolidating Statements of Operations

(unaudited - in millions)

	For the nine months ended June 30, 2018
	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
Revenue	$	—		$	8,230.1		$	6,688.3		$	(68.7	)	$	14,849.7

Cost of revenue	—			7,950.0			6,505.8			(68.7		)	14,387.1

Gross profit	—			280.1			182.5			—			462.6

Equity in earnings from subsidiaries	272.7			103.8			—			(376.5		)	—
Equity in earnings of joint ventures	—			30.9			24.7			—			55.6
General and administrative expenses	(90.8		)	—			(9.2		)	—			(100.0		)
Impairment of assets held for sale, including goodwill	—			—			(168.2		)	—			(168.2		)
Loss on disposal activities	—			—			(2.1		)	—			(2.1		)

Income from operations	181.9			414.8			27.7			(376.5		)	247.9

Other income	10.8			20.1			9.9			(23.3		)	17.5
Interest expense	(194.3		)	(14.5		)	(26.5		)	23.3			(212.0		)

(Loss) income before income tax (benefit) expense	(1.6		)	420.4			11.1			(376.5		)	53.4

Income tax (benefit) expense	(54.1		)	149.4			(133.7		)	—			(38.4		)

Net income	52.5			271.0			144.8			(376.5		)	91.8
Noncontrolling interest in income of consolidated subsidiaries, net of tax	—			—			(39.3		)	—			(39.3		)

Net income attributable to AECOM	$	52.5		$	271.0		$	105.5		$	(376.5	)	$	52.5

	For the nine months ended June 30, 2017
	Parent			Guarantor Subsidiaries			Non-Guarantor Subsidiaries			Eliminations			Total
Revenue	$	—		$	7,699.4		$	5,699.9		$	(52.3	)	$	13,347.0

Cost of revenue	—			7,410.3			5,475.4			(52.3		)	12,833.4

Gross profit	—			289.1			224.5			—			513.6

Equity in earnings from subsidiaries	396.1			149.3			—			(545.4		)	—
Equity in earnings of joint ventures	—			34.5			75.2			—			109.7
General and administrative expenses	(89.9		)	—			(6.6		)	—			(96.5		)
Acquisition and integration expenses	(35.4		)	—			—			—			(35.4		)
Gain on disposal activities	—			—			0.6			—			0.6

Income from operations	270.8			472.9			293.7			(545.4		)	492.0

Other income	1.7			23.6			6.8			(27.9		)	4.2
Interest expense	(155.5		)	(18.3		)	(31.1		)	27.9			(177.0		)

Income before income tax (benefit) expense	117.0			478.2			269.4			(545.4		)	319.2

Income tax (benefit) expense	(133.8		)	114.8			20.5			—			1.5

Net income	250.8			363.4			248.9			(545.4		)	317.7
Noncontrolling interest in income of consolidated subsidiaries, net of tax	—			—			(66.8		)	—			(66.8		)

Net income attributable to AECOM	$	250.8		$	363.4		$	182.1		$	(545.4	)	$	250.9

Schedule of Consolidating Statements of Comprehensive Income (Loss)

Consolidating Statements of Comprehensive Income (Loss)

(unaudited - in millions)

	For the three months ended June 30, 2018
	Parent		Guarantor Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Total
Net income	$	60.9	$	83.5	$	56.3		$	(125.6	)	$	75.1
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) on derivatives, net of tax	0.9		—		(0.2		)	—			0.7
Foreign currency translation adjustments	—		—		(67.2		)	—			(67.2		)
Pension adjustments, net of tax	0.3		—		14.8			—			15.1

Other comprehensive income (loss), net of tax	1.2		—		(52.6		)	—			(51.4		)

Comprehensive income, net of tax	62.1		83.5		3.7			(125.6		)	23.7
Noncontrolling interests in comprehensive income of consolidated subsidiaries, net of tax	—		—		(14.0		)	—			(14.0		)

Comprehensive income (loss) attributable to AECOM, net of tax	$	62.1	$	83.5	$	(10.3	)	$	(125.6	)	$	9.7

	For the three months ended June 30, 2017
	Parent		Guarantor Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Total
Net income	$	101.2	$	71.9	$	93.6		$	(130.6	)	$	136.1
Other comprehensive income, net of tax:
Net unrealized gain on derivatives, net of tax	0.5		—		0.1			—			0.6
Foreign currency translation adjustments	—		—		46.2			—			46.2
Pension adjustments, net of tax	0.6		—		(7.2		)	—			(6.6		)

Other comprehensive income, net of tax	1.1		—		39.1			—			40.2

Comprehensive income, net of tax	102.3		71.9		132.7			(130.6		)	176.3
Noncontrolling interests in comprehensive income of consolidated subsidiaries, net of tax	—		—		(35.1		)	—			(35.1		)

Comprehensive income attributable to AECOM, net of tax	$	102.3	$	71.9	$	97.6		$	(130.6	)	$	141.2

Consolidating Statements of Comprehensive Income (Loss)

(unaudited - in millions)

	For the nine months ended June 30, 2018
	Parent		Guarantor Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Total
Net income	$	52.5	$	271.0	$	144.8		$	(376.5	)	$	91.8
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) on derivatives, net of tax	1.5		—		(1.7		)	—			(0.2		)
Foreign currency translation adjustments	—		—		(57.7		)	—			(57.7		)
Pension adjustments, net of tax	1.8		—		(0.3		)	—			1.5

Other comprehensive income (loss), net of tax	3.3		—		(59.7		)	—			(56.4		)

Comprehensive income, net of tax	55.8		271.0		85.1			(376.5		)	35.4
Noncontrolling interests in comprehensive income of consolidated subsidiaries, net of tax	—		—		(40.5		)	—			(40.5		)

Comprehensive income (loss) attributable to AECOM, net of tax	$	55.8	$	271.0	$	44.6		$	(376.5	)	$	(5.1	)

	For the nine months ended June 30, 2017
	Parent		Guarantor Subsidiaries		Non-Guarantor Subsidiaries			Eliminations			Total
Net income	$	250.8	$	363.4	$	248.9		$	(545.4	)	$	317.7
Other comprehensive income, net of tax:
Net unrealized gain (loss) on derivatives, net of tax	4.6		—		(0.3		)	—			4.3
Foreign currency translation adjustments	—		—		13.2			—			13.2
Pension adjustments, net of tax	1.9		—		6.9			—			8.8

Other comprehensive income, net of tax	6.5		—		19.8			—			26.3

Comprehensive income, net of tax	257.3		363.4		268.7			(545.4		)	344.0
Noncontrolling interests in comprehensive income of consolidated subsidiaries, net of tax	—		—		(67.2		)	—			(67.2		)

Comprehensive income attributable to AECOM, net of tax	$	257.3	$	363.4	$	201.5		$	(545.4	)	$	276.8

Schedule on Condensed Consolidating Statements of Cash Flows

Condensed Consolidating Statements of Cash Flows

(unaudited - in millions)

	For the nine months ended June 30, 2018
	Parent			Guarantor Subsidiaries			Non- Guarantor Subsidiaries			Eliminations			Total

CASH FLOWS FROM OPERATING ACTIVITIES	$	(59.9	)	$	257.3		$	45.3		$	—		$	242.7
CASH FLOWS FROM INVESTING ACTIVITIES:
Proceeds from purchase price adjustment to business acquisition	—			—			2.2			—			2.2
Cash acquired from consolidation of joint venture	—			—			7.6			—			7.6
Proceeds from disposal of business, net of cash disposed	—			—			19.5			—			19.5
Net investment in unconsolidated joint ventures	(5.2		)	(9.4		)	(48.7		)	—			(63.3		)
Net payments for purchase of investments	—			—			(17.5		)	—			(17.5		)
Payments for capital expenditures, net of disposals	(19.8		)	(34.2		)	(11.6		)	—			(65.6		)
Net investment in intercompany notes	(85.4		)	(545.3		)	(73.8		)	704.5			—
Other intercompany investing activities	109.9			504.9			—			(614.8		)	—

Net cash used in investing activities	(0.5		)	(84.0		)	(122.3		)	89.7			(117.1		)

CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings under credit agreements	6,701.2			—			737.9			—			7,439.1
Repayments of borrowings under credit agreements	(6,509.5		)	(14.0		)	(131.4		)	—			(6,654.9		)
Redemption of unsecured senior notes	(800.0		)	—			—			—			(800.0		)
Prepayment premium on redemption of unsecured senior notes	(34.5		)	—			—			—			(34.5		)
Cash paid for debt issuance costs	(10.7		)	—			—			—			(10.7		)
Proceeds from issuance of common stock	27.3			—			—			—			27.3
Proceeds from exercise of stock options	3.2			—			—			—			3.2
Payments to repurchase common stock	(29.3		)	—			—			—			(29.3		)
Net distributions to noncontrolling interests	—			—			(72.7		)	—			(72.7		)
Other financing activities	8.8			(26.6		)	26.5			—			8.7
Net borrowings (repayments) on intercompany notes	673.3			(4.8		)	36.0			(704.5		)	—
Other intercompany financing activities	—			(80.0		)	(534.8		)	614.8			—

Net cash provided by (used in) financing activities	29.8			(125.4		)	61.5			(89.7		)	(123.8		)

EFFECT OF EXCHANGE RATE CHANGES ON CASH	—			—			(2.8		)	—			(2.8		)
NET (DECREASE) INCREASE IN CASH AND CASH EQUIVALENTS	(30.6		)	47.9			(18.3		)	—			(1.0		)
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	32.6			254.9			514.9			—			802.4

CASH AND CASH EQUIVALENTS AT END OF YEAR	$	2.0		$	302.8		$	496.6		$	—		$	801.4

Condensed Consolidating Statements of Cash Flows

(unaudited - in millions)

	For the nine months ended June 30, 2017
	Parent			Guarantor Subsidiaries			Non- Guarantor Subsidiaries			Eliminations			Total

CASH FLOWS FROM OPERATING ACTIVITIES	$	(123.0	)	$	548.3		$	20.1		$	—		$	445.4
CASH FLOWS FROM INVESTING ACTIVITIES:
Payment for business acquisitions, net of cash acquired	—			—			(1.7		)	—			(1.7		)
Proceeds from disposal of business, net of cash disposed	—			—			2.2			—			2.2
Net investment in unconsolidated joint ventures	—			0.3			(11.1		)	—			(10.8		)
Net proceeds from sale of investments	—			—			0.7			—			0.7
Payments for capital expenditures, net of disposals	(17.8		)	(24.5		)	(16.2		)	—			(58.5		)
Net investment in intercompany notes	(2.1		)	(16.0		)	(7.0		)	25.1			—
Other intercompany investing activities	118.4			(68.4		)	—			(50.0		)	—

Net cash provided by (used in) investing activities	98.5			(108.6		)	(33.1		)	(24.9		)	(68.1		)

CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings under credit agreements	4,630.3			—			8.4			—			4,638.7
Repayments of borrowings under credit agreements	(5,580.0		)	(25.9		)	(29.3		)	—			(5,635.2		)
Proceeds from issuance of unsecured senior notes	1,000.0			—			—			—			1,000.0
Redemption of unsecured senior notes	—			(179.2		)	—			—			(179.2		)
Cash paid for debt issuance costs	(13.1		)	—			—			—			(13.1		)
Proceeds from issuance of common stock	24.7			—			—			—			24.7
Proceeds from exercise of stock options	3.6			—			—			—			3.6
Payments to repurchase common stock	(22.3		)	—			—			—			(22.3		)
Net distributions to noncontrolling interests	—			—			(44.6		)	—			(44.6		)
Other financing activities	(17.0		)	(65.4		)	53.0			—			(29.4		)
Net borrowings (repayments) on intercompany notes	24.3			(17.4		)	18.2			(25.1		)	—
Other intercompany financing activities	—			(149.2		)	99.2			50.0			—

Net cash provided by (used in) financing activities	50.5			(437.1		)	104.9			24.9			(256.8		)

EFFECT OF EXCHANGE RATE CHANGES ON CASH	—			—			(0.2		)	—			(0.2		)
NET INCREASE IN CASH AND CASH EQUIVALENTS	26.0			2.6			91.7			—			120.3
CASH AND CASH EQUIVALENTS AT BEGINNING OF YEAR	1.8			196.3			494.0			—			692.1

CASH AND CASH EQUIVALENTS AT END OF YEAR	$	27.8		$	198.9		$	585.7		$	—		$	812.4

Basis of Presentation (Details)	9 Months Ended
Basis of Presentation (Details)	Jun. 30, 2018
Minimum
Length of fiscal year	364 days
Maximum
Length of fiscal year	371 days

Business Acquisitions, Goodwill and Intangible Assets - URS Acquisition (Details) $ in Millions		3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 17, 2014 USD ($)	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) item	Jun. 30, 2017 USD ($)	Sep. 30, 2017 USD ($) item
Business acquisition
Number of acquisition \| item				1		2
Total consideration				$ 5.6		$ 164.4
URS
Business acquisition
Ownership acquired (in percent)	100.00%
Total consideration	$ 2,300.0
Consideration paid by issuing stock	1,600.0
Senior notes assumed, net of Company repayments	400.0
Repayment of acquiree term loan as part of consideration	600.0
Repayment of acquiree line of credit as part of consideration	100.0
Accrued expenses and other current liabilities	240.0
Amortization of intangible assets of acquiree for the period		$ 16.0	$ 20.9	52.4	$ 62.7
Fair value adjustment of joint ventures		1.7	2.4	5.3	6.9
Fair value adjustment of noncontrolling interests		(2.0)	(2.1)	(6.2)	$ (6.4)
Fair value of margin liability		24.1		$ 24.1		$ 8.6
Income from operations related to margin fair value liability		$ 8.1	$ 1.6
URS \| Customer relationships, contracts and backlog
Business acquisition
Acquired backlog and customer relationship assets	$ 973.8
URS \| Customer relationships, contracts and backlog \| Minimum
Business acquisition
Useful life (in years)	1 year
URS \| Customer relationships, contracts and backlog \| Maximum
Business acquisition
Useful life (in years)	11 years
URS \| Customer relationships, contracts and backlog \| Weighted Average
Business acquisition
Useful life (in years)	3 years

Business Acquisitions, Goodwill and Intangible Assets - Expenses (Details) $ in Thousands	9 Months Ended
	Jun. 30, 2017 USD ($)
Business Acquisitions, Goodwill and Intangible Assets
Severance and personnel costs	$ 29,900
Professional service, real estate-related, and other expenses	5,500
Total	35,409
Severance expense	$ 7,700

Business Acquisitions, Goodwill and Intangible Assets - Disposal Group (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2017
Classification of related assets and liabilities of the Disposal Group as held for sale in the consolidated balance sheet
Loss on disposal of portion of assets in the disposal group	$ 2,149	$ 2,149	$ (572)
Impairment of goodwill		125,400
Summary of financial information of the Disposal Group is as follows:
Impairment of assets held for sale, including goodwill		168,178
Construction Services \| Disposal Group as held for sale
Classification of related assets and liabilities of the Disposal Group as held for sale in the consolidated balance sheet
Loss on disposal of portion of assets in the disposal group	2,100
Impairment of goodwill		125,400
Impairment of intangible and other noncurrent assets		42,800
Accounts receivable included in Current assets held for sale	48,000	48,000
Property plant and equipment included in Current assets held for sale	14,300	14,300
Accounts payable included in Current liabilities held for sale	$ 12,600	$ 12,600

Business Acquisitions, Goodwill and Intangible Assets - Goodwill (Details) $ in Thousands	9 Months Ended
	Jun. 30, 2018 USD ($)
Changes in the carrying value of goodwill by reporting segment
Goodwill at the beginning of the period	$ 5,992,881
Measurement period adjustments	91,000
Impairment	(125,400)
Foreign Exchange Impact	(30,500)
Goodwill at the end of the period	5,928,029
Design and Consulting Services
Changes in the carrying value of goodwill by reporting segment
Goodwill at the beginning of the period	3,218,900
Foreign Exchange Impact	(24,100)
Goodwill at the end of the period	3,194,800
Construction Services
Changes in the carrying value of goodwill by reporting segment
Goodwill at the beginning of the period	1,049,900
Measurement period adjustments	91,000
Impairment	(125,400)
Foreign Exchange Impact	(8,700)
Goodwill at the end of the period	1,006,800
Management Services
Changes in the carrying value of goodwill by reporting segment
Goodwill at the beginning of the period	1,724,100
Foreign Exchange Impact	2,300
Goodwill at the end of the period	$ 1,726,400

Business Acquisitions, Goodwill and Intangible Assets - Intangible Assets (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2018	Sep. 30, 2017
Identifiable intangible assets with finite useful lives
Gross Amount	$ 1,305,000	$ 1,301,900
Accumulated Amortization	(961,800)	(886,800)
Intangible Assets, Net	343,185	415,096
Backlog and customer relationships
Identifiable intangible assets with finite useful lives
Gross Amount	1,286,700	1,283,600
Accumulated Amortization	(945,000)	(870,200)
Intangible Assets, Net	$ 341,700	413,400
Backlog and customer relationships \| Minimum
Identifiable intangible assets with finite useful lives
Amortization Period	1 year
Backlog and customer relationships \| Maximum
Identifiable intangible assets with finite useful lives
Amortization Period	11 years
Trademark / tradename
Identifiable intangible assets with finite useful lives
Gross Amount	$ 18,300	18,300
Accumulated Amortization	(16,800)	(16,600)
Intangible Assets, Net	$ 1,500	$ 1,700
Trademark / tradename \| Minimum
Identifiable intangible assets with finite useful lives
Amortization Period	3 months 18 days
Trademark / tradename \| Maximum
Identifiable intangible assets with finite useful lives
Amortization Period	2 years

Business Acquisitions, Goodwill and Intangible Assets - Amortization Expense (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Sep. 30, 2017
Business Acquisitions, Goodwill and Intangible Assets
Amortization expense	$ 75,000	$ 76,500
Estimated amortization expense for the remainder of fiscal 2018 and for the succeeding years
2018 (three months remaining)	22,700
2019	83,900
2020	70,000
2021	56,900
2022	44,100
Thereafter	65,600
Intangible Assets, Net	$ 343,185		$ 415,096

Accounts Receivable - Net (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Jun. 30, 2018	Sep. 30, 2017
Billed	$ 2,560,600	$ 2,317,800
Unbilled	2,295,000	2,293,500
Contract retentions	638,900	568,600
Total accounts receivable-gross	5,494,500	5,179,900
Allowance for doubtful accounts	(46,500)	(52,200)
Total accounts receivable-net	$ 5,447,985	$ 5,127,743
Additional disclosures
Unbilled receivables are expected to be billed and collected (in months)	12 months	12 months
Trade receivables sold, outstanding	$ 342,700	$ 325,200
Other than U.S government outstanding receivables
Additional disclosures
Number of Customers	0	0
Outstanding receivables (as a percent)	10.00%	10.00%

Joint Ventures and Variable Interest Entities - Consolidated (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018 USD ($) employee	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) employee	Jun. 30, 2017 USD ($)	Sep. 30, 2017 USD ($)
Financial Information
Minimum number of employees \| employee	0		0
Current assets	$ 7,043,842		$ 7,043,842		$ 6,682,222
TOTAL ASSETS	14,727,417		14,727,417		14,396,956
Current liabilities	5,890,070		5,890,070		5,578,379
TOTAL LIABILITIES	10,467,283		10,467,283		10,182,270
Total AECOM equity	4,077,732		4,077,732		3,996,126
Noncontrolling interests	182,402		182,402		218,560
TOTAL STOCKHOLDERS' EQUITY	4,260,134		4,260,134		4,214,686
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	14,727,417		14,727,417		14,396,956
Joint ventures summarized financial information
Revenue	5,147,920	$ 4,561,467	14,849,662	$ 13,347,014
Consolidated Joint Ventures
Financial Information
Current assets	906,000		906,000		832,100
Non-current assets	198,400		198,400		188,800
TOTAL ASSETS	1,104,400		1,104,400		1,020,900
Current liabilities	638,200		638,200		524,900
Non-current liabilities	12,300		12,300		12,400
TOTAL LIABILITIES	650,500		650,500		537,300
Total AECOM equity	272,100		272,100		274,700
Noncontrolling interests	181,800		181,800		208,900
TOTAL STOCKHOLDERS' EQUITY	453,900		453,900		483,600
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,104,400		1,104,400		$ 1,020,900
Joint ventures summarized financial information
Revenue			$ 1,820,800	$ 1,457,000

Joint Ventures and Variable Interest Entities - Unconsolidated (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Sep. 30, 2017
Financial Information
Current assets	$ 7,043,842		$ 7,043,842		$ 6,682,222
TOTAL ASSETS	14,727,417		14,727,417		14,396,956
Current liabilities	5,890,070		5,890,070		5,578,379
TOTAL LIABILITIES	10,467,283		10,467,283		10,182,270
TOTAL STOCKHOLDERS' EQUITY	4,260,134		4,260,134		4,214,686
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	14,727,417		14,727,417		14,396,956
AECOM's investment in joint ventures	398,134		398,134		364,223
Joint ventures summarized financial information
Revenue	5,147,920	$ 4,561,467	14,849,662	$ 13,347,014
Cost of revenue	4,962,741	4,386,291	14,387,059	12,833,421
Gross profit	185,179	175,176	462,603	513,593
Net income	75,142	$ 136,074	91,800	317,692
Unconsolidated Joint Ventures
Financial Information
Current assets	1,759,000		1,759,000		1,912,200
Non-current assets	896,500		896,500		749,800
TOTAL ASSETS	2,655,500		2,655,500		2,662,000
Current liabilities	1,381,600		1,381,600		1,570,200
Non-current liabilities	223,000		223,000		185,100
TOTAL LIABILITIES	1,604,600		1,604,600		1,755,300
TOTAL STOCKHOLDERS' EQUITY	1,050,900		1,050,900		906,700
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	2,655,500		2,655,500		2,662,000
AECOM's investment in joint ventures	$ 398,100		398,100		$ 364,200
Joint ventures summarized financial information
Revenue			4,041,700	4,077,700
Cost of revenue			3,843,700	3,862,900
Gross profit			198,000	214,800
Net income			$ 191,800	$ 205,300

Joint Ventures and Variable Interest Entities - Equity in Earnings (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Financial Information
Equity in earnings of joint ventures	$ 12,863	$ 66,458	$ 55,621	$ 109,667
Unconsolidated Joint Ventures \| Pass through joint ventures
Financial Information
Equity in earnings of joint ventures			29,800	27,500
Unconsolidated Joint Ventures \| Other Joint Ventures
Financial Information
Equity in earnings of joint ventures			$ 25,800	$ 82,200

Pension Benefit Obligations (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
United States Pension Plan of US Entity, Defined Benefit
Components of net periodic (benefit) cost:
Service costs	$ 1.3	$ 1.0	$ 3.7	$ 3.2
Interest cost on projected benefit obligation	5.1	4.8	15.5	14.4
Expected return on plan assets	(7.9)	(7.7)	(23.6)	(23.2)
Amortization of net loss	1.0	1.0	3.0	3.2
Net periodic (benefit) cost	(0.5)	(0.9)	(1.4)	(2.4)
Change in benefit obligation:
Employer contributions			6.6
Expected remaining scheduled annual employer contributions for the current fiscal year	5.2		5.2
Foreign Pension Plan, Defined Benefit
Components of net periodic (benefit) cost:
Service costs	0.2	0.3	0.8	0.9
Interest cost on projected benefit obligation	8.1	7.1	24.3	21.0
Expected return on plan assets	(10.8)	(10.5)	(32.6)	(30.8)
Amortization of prior service cost			(0.1)	(0.1)
Amortization of net loss	2.0	3.3	6.2	9.7
Settlement loss recognized			0.2
Net periodic (benefit) cost	(0.5)	$ 0.2	(1.2)	$ 0.7
Change in benefit obligation:
Employer contributions			21.1
Expected remaining scheduled annual employer contributions for the current fiscal year	$ 6.2		$ 6.2

Debt (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017	Oct. 17, 2014
Debt
Total debt	$ 3,929,800	$ 3,896,400
Less: Current portion of debt and short-term borrowings	(173,000)	(142,000)
Less: Unamortized debt issuance costs	(49,500)	(52,300)
Long-term debt	3,707,293	3,702,109
2014 Credit Agreement
Debt
Total debt	1,667,700	908,700
2014 Senior Notes
Debt
Total debt	800,000	1,600,000
2017 Senior Notes
Debt
Total debt	1,000,000	1,000,000
URS Senior Notes
Debt
Total debt	247,800	247,700	$ 1,000,000
Other Debt
Debt
Total debt	$ 214,300	$ 140,000

Debt - Scheduled Maturities (Details) - USD ($) $ in Millions	Jun. 30, 2018	Sep. 30, 2017
Scheduled maturities of debt:
2018 (three months remaining)	$ 72.7
2019	122.2
2020	86.9
2021	485.8
2022	301.0
Thereafter	2,861.2
Total debt	$ 3,929.8	$ 3,896.4

Debt - 2014 Credit Agreement (Details) $ in Millions, $ in Millions, $ in Millions					6 Months Ended	9 Months Ended
	Sep. 30, 2019	Jun. 30, 2018 USD ($)	Mar. 13, 2018 USD ($)	Sep. 29, 2016 USD ($)	Mar. 31, 2017	Jun. 30, 2018 USD ($)	Mar. 13, 2018 CAD ($)	Mar. 13, 2018 AUD ($)	Mar. 13, 2018 USD ($)	Sep. 30, 2017 USD ($)	Oct. 17, 2014 CAD ($)	Oct. 17, 2014 AUD ($)	Oct. 17, 2014 USD ($)
Term loan A \| Base Rate \| USD
Debt agreements
Interest rate, basis spread (as a percent)			0.50%
Secured letter of credit outside credit agreement
Debt agreements
Borrowing capacity				$ 500.0
2014 Credit Agreement
Debt agreements
Borrowing capacity.			$ 600.0
Maximum consolidated leverage ratio covenant				5.00	4.75
Consolidated leverage ratio						4.1
Consolidated interest coverage ratio						4.6
2014 Credit Agreement \| Base Rate
Debt agreements
Interest rate, basis spread (as a percent)			0.75%
2014 Credit Agreement \| Euro currency rate
Debt agreements
Interest rate, basis spread (as a percent)			1.75%
2014 Credit Agreement \| Maximum \| Base Rate
Debt agreements
Interest rate, basis spread (as a percent)			1.00%
2014 Credit Agreement \| Maximum \| Euro currency rate
Debt agreements
Interest rate, basis spread (as a percent)			2.00%
2014 Credit Agreement \| Minimum \| Base Rate
Debt agreements
Interest rate, basis spread (as a percent)			0.25%
2014 Credit Agreement \| Minimum \| Euro currency rate
Debt agreements
Interest rate, basis spread (as a percent)			1.25%
2014 Credit Agreement \| Term loan A
Debt agreements
Borrowing capacity							$ 500	$ 250	$ 510.0		$ 500	$ 250	$ 510.0
Borrowing capacity.				$ 185.0
2014 Credit Agreement \| Term loan A \| Euro currency rate
Debt agreements
Interest rate, basis spread (as a percent)			1.50%
2014 Credit Agreement \| Term loan B
Debt agreements
Borrowing capacity									$ 600.0				600.0
2014 Credit Agreement \| Term loan B \| Base Rate
Debt agreements
Interest rate, basis spread (as a percent)			0.75%
2014 Credit Agreement \| Term loan B \| Euro currency rate
Debt agreements
Interest rate, basis spread (as a percent)			1.75%
2014 Credit Agreement \| Revolving credit facility
Debt agreements
Borrowing capacity													$ 1,350.0
Outstanding letters of credit		$ 53.9				$ 53.9				$ 58.1
Remaining borrowing capacity under credit facility		1,220.4				$ 1,220.4				$ 991.9
2014 Credit Agreement \| Revolving credit facility \| Maximum
Debt agreements
Borrowing capacity.		$ 1,350.0	$ 1,050.0
2014 Credit Agreement \| Line of Credit \| Maximum
Debt agreements
Consolidated leverage ratio	4.0		4.5

Debt - 2014 Senior Notes (Details) - USD ($)			3 Months Ended	9 Months Ended
Debt - 2014 Senior Notes (Details) - USD ($)	Mar. 16, 2018	Oct. 06, 2014	Jun. 30, 2018	Jun. 30, 2018
The 2022 Notes
Debt
Prepayment premium redemption			$ 34,500,000	$ 34,500,000
2014 Senior Notes \| The 2022 Notes
Debt
Principal amount		$ 800,000,000
Interest rate (as a percent)		5.75%
Redemption price equal to principal amount (in percent)	104.313%
Prepayment premium redemption				34,500,000
2014 Senior Notes \| The 2024 Notes
Debt
Principal amount		$ 800,000,000
Interest rate (as a percent)		5.875%
Fair value of debt instrument			$ 824,000,000	$ 824,000,000
2014 Senior Notes \| The 2024 Notes \| Prior to July 15 2024
Debt
Redemption price equal to principal amount (in percent)		100.00%
2014 Senior Notes \| The 2024 Notes \| On or after July 15, 2024
Debt
Redemption price equal to principal amount (in percent)		100.00%

Debt - 2017 Senior Notes (Details) - USD ($)	Feb. 21, 2017	Jun. 30, 2018
Term loan A
Debt
Amount of debt redeemed	$ 600,000,000
Term loan B
Debt
Amount of debt redeemed	127,600,000
Revolving credit facility
Debt
Amount of debt redeemed	250,000,000
2017 Senior Notes
Debt
Principal amount	$ 1,000,000,000
Interest rate (as a percent)	5.125%
Fair value of debt instrument		$ 935,000,000
2017 Senior Notes \| Prior to December 15, 2026
Debt
Redemption price equal to principal amount (in percent)	100.00%
2017 Senior Notes \| Prior to March 15, 2020
Debt
Maximum principal amount that can be redeemed using proceeds from equity offerings(in percent)	35.00%
Redemption price equal to principal using proceeds from equity offerings (in percent)	105.125%
2017 Senior Notes \| On or after December 15, 2026
Debt
Redemption price equal to principal amount (in percent)	100.00%

Debt - URS Senior Notes (Details) - USD ($) $ in Millions	Oct. 24, 2014	Jun. 30, 2018	Sep. 30, 2017	Apr. 03, 2017	Oct. 17, 2014
Debt
Debt		$ 3,929.8	$ 3,896.4
URS Senior Notes
Debt
Debt		247.8	$ 247.7		$ 1,000.0
URS Senior Notes \| 2017 URS Senor Notes
Debt
Interest rate (as a percent)					3.85%
Redemption price equal to principal using proceeds from equity offerings (in percent)	101.00%
Amount of debt redeemed	$ 572.3			$ 179.2
URS Senior Notes \| 2022 URS Senior Notes
Debt
Interest rate (as a percent)					5.00%
Debt		247.8
Fair value of debt instrument		$ 251.0

Debt - Other Debt and Other Items(Details) - USD ($) $ in Millions	Jun. 30, 2018	Sep. 30, 2017
Debt
Total debt	$ 3,929.8	$ 3,896.4
Other Debt
Debt
Total debt	214.3	140.0
Other Debt \| Standby letter of credit
Debt
Outstanding letters of credit	451.9	$ 445.7
Remaining borrowing capacity under credit facility	$ 485.9

Debt - Effective Interest Rate (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Debt
Effective interest rate including effects of interest rate swap agreements			4.6%	4.4%
Amortization of deferred debt issuance costs	$ 2.5	$ 2.8	$ 15.1	$ 14.3
The 2022 Notes
Debt
Prepayment premium redemption	$ 34.5		$ 34.5

Derivative Financial Instruments and Fair Value Measurements - Cash Flow Hedges (Details) - Designated as Hedging Instrument - Cash Flow Hedging $ in Millions, $ in Millions	Jun. 30, 2018 AUD ($)	Jun. 30, 2018 USD ($)	Sep. 30, 2017 AUD ($)	Sep. 30, 2017 USD ($)
Interest Rate Swap June 2018 \| USD
Derivative financial instruments
Notional Amount				$ 300.0
Fixed Rate (as a percent)			1.63%	1.63%
Interest Rate Swap September 2018 \| USD
Derivative financial instruments
Notional Amount		$ 300.0		$ 300.0
Fixed Rate (as a percent)	1.54%	1.54%	1.54%	1.54%
Interest Rate Swap February 2021 \| AUD
Derivative financial instruments
Notional Amount		$ 200.0
Fixed Rate (as a percent)	2.19%	2.19%
Interest Rate Swap September 2022 \| CAD
Derivative financial instruments
Notional Amount		$ 400.0
Fixed Rate (as a percent)	2.49%	2.49%
Interest Rate Swap February 2023 \| USD
Derivative financial instruments
Notional Amount		$ 200.0
Fixed Rate (as a percent)	2.60%	2.60%
Foreign currency contracts
Derivative financial instruments
Notional principal of derivative exchange contracts	$ 67.3	$ 50.9	$ 15.1	$ 11.3

Derivative Financial Instruments and Fair Value Measurements - Fair Value Measurements (Details)	9 Months Ended	12 Months Ended
	Jun. 30, 2018 USD ($)	Sep. 30, 2015 item	Sep. 30, 2017 USD ($)
Derivative financial instruments
Number of contingent consideration arrangements \| item		1
Level 3
Derivative financial instruments
Fair value of contingent consideration liability	$ 13,000,000		$ 13,000,000
Designated as Hedging Instrument \| Cash Flow Hedging \| Interest rate swap agreements
Derivative financial instruments
Losses Recognized in Income on Derivatives (Amount Excluded from Effectiveness Testing and Ineffective Portion)	$ 0

Share-based Payments (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	9 Months Ended		12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Sep. 30, 2017
Stock options, Weighted average exercise price
Vesting period	3 years		3 years
Recognized compensation expense	$ 54.3	$ 58.7
Unrecognized compensation expense	$ 111.1		$ 96.8
Employee Stock Option
Shares of stock under options
Balance at the beginning of the period (in shares)	0.7	0.9	0.9
Options exercised (in shares)	(0.1)	(0.2)
Balance at the end of the period (in shares)	0.6	0.7	0.7
Vested and expected to vest in the future at the end of the period (in shares)	0.6	0.7
Stock options, Weighted average exercise price
Balance at the beginning of the period (in dollars per share)	$ 31.11	$ 30.36	$ 30.36
Options exercised (in dollars per share)	27.79	26.42
Balance at the end of the period (in dollars per share)	31.62	31.11	$ 31.11
Vested and expected to vest in the future at the end of the period (in dollars per share)	$ 31.62	31.11
Performance Earnings Program
Stock options, Weighted average exercise price
Vesting period	3 years
Weighted average grant-date fair value of stock options granted (in dollars per share)	$ 37.69	38.16
Restricted Stock Units (RSUs)
Stock options, Weighted average exercise price
Weighted average grant-date fair value of stock options granted (in dollars per share)	$ 36.91	$ 37.97

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017	Jun. 30, 2018	Jun. 30, 2017	Sep. 30, 2019	Sep. 30, 2018
Income Taxes
Effective tax rate (as a percent)			(71.80%)	0.50%
Net benefit from Tax Cuts and Jobs Acts of 2017			$ 41.7
Benefit from change in uncertain tax positions in US and Canada			33.8
Benefit from income tax credits and incentives			21.6
Amount of tax expense arising from a business combination related to non-deductible goodwill			33.9
Amount of uncertain tax positions for future years	$ 26.2
Federal statutory rate (as a percent)		35.00%			21.00%
Blended statutory rate (as a percentage)						24.50%
Provisional amount related to remeasurement of deferred tax balance		$ 36.1
Provisional amount of tax benefit related to releasing of deferred tax liability		77.0
Provisional amount of income tax expense related to transition tax on foreign subsidiaries		$ 71.4
Gross book-tax differences from non-U.S. subsidiaries			$ 1,700.0

Earnings Per Share (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
Earnings Per Share (Details) - shares shares in Thousands	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Earnings Per Share
Denominator for basic earnings per share (in shares)	160,395	155,763	159,266	155,128
Potential common shares (in shares)	2,800	3,000	3,100	3,400
Denominator for diluted earnings per share (in shares)	163,213	158,820	162,426	158,488

Other Financial Information (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2018	Sep. 30, 2017
Accrued expenses and other current liabilities
Accrued salaries and benefits	$ 938,900	$ 1,018,500
Accrued contract costs	853,300	911,900
Other accrued expenses	392,500	315,100
Total accrued expenses	2,184,672	2,245,519
Restructuring charges	26,700
Payments for restructuring charges	23,300
Accounts receivable-net	5,447,985	5,127,743
Accelerated recovery of pension entitlement
Accrued expenses and other current liabilities
Accounts receivable-net	50,000
Professional liability accrual
Accrued expenses and other current liabilities
Accrued contract costs	$ 540,500	$ 547,900

Reclassifications out of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Accumulated balances
Balance at the beginning of the period	$ (707,000)	$ (871,600)	$ (700,661)	$ (857,600)
Other comprehensive income (loss) before reclassification	(53,700)	36,100	(65,400)	14,300
Amounts reclassified from accumulated other comprehensive income (loss)	2,400	3,800	7,800	11,600
Balance at the end of the period	(758,287)	(831,700)	(758,287)	(831,700)
Pension Related Adjustments
Accumulated balances
Balance at the beginning of the period	(295,500)	(353,500)	(281,900)	(368,900)
Other comprehensive income (loss) before reclassification	13,000	(9,800)	(5,800)	(700)
Amounts reclassified from accumulated other comprehensive income (loss)	2,200	3,200	7,400	9,500
Balance at the end of the period	(280,300)	(360,100)	(280,300)	(360,100)
Foreign Currency Translation Adjustments
Accumulated balances
Balance at the beginning of the period	(410,200)	(516,800)	(418,400)	(483,700)
Other comprehensive income (loss) before reclassification	(67,100)	46,000	(58,900)	12,900
Balance at the end of the period	(477,300)	(470,800)	(477,300)	(470,800)
Loss on Derivative Instruments
Accumulated balances
Balance at the beginning of the period	(1,300)	(1,300)	(400)	(5,000)
Other comprehensive income (loss) before reclassification	400	(100)	(700)	2,100
Amounts reclassified from accumulated other comprehensive income (loss)	200	600	400	2,100
Balance at the end of the period	$ (700)	$ (800)	$ (700)	$ (800)

Commitments and Contingencies (Details) - USD ($)					1 Months Ended		9 Months Ended
Commitments and Contingencies (Details) - USD ($)	May 24, 2018	Jul. 21, 2017	Jul. 03, 2017	Apr. 01, 2017	Sep. 30, 2017	Dec. 31, 2014	Jun. 30, 2018	Sep. 02, 2016
URS \| Design build contractor
Commitments and Contingencies
Damages claimed, value	$ 11,900,000		$ 70,000,000	$ 8,200,000
Standby letter of credit
Commitments and Contingencies
Contingency liability					$ 503,800,000		$ 505,800,000
Surety Bond
Commitments and Contingencies
Surety bonds issued					5,700,000,000		$ 5,500,000,000
AECOM USA, Inc. \| Minimum
Commitments and Contingencies
Damages claimed, value					$ 100,000
Advatech LLC
Commitments and Contingencies
Percentage of ownership in joint venture							60.00%
Invoice amount								$ 81,000,000
Advatech LLC \| Demand for arbitration and reimbursement
Commitments and Contingencies
Damages claimed, value		$ 81,000,000
DOE Deactivation, Demolition, And Removal Project \| Department of Energy \| Maximum
Commitments and Contingencies
Cost-reimbursement at risk							$ 106,000,000
DOE Deactivation, Demolition, And Removal Project \| WGI Ohio and DOE \| Minimum
Commitments and Contingencies
Cost-reimbursement at risk							106,000,000
DOE Deactivation, Demolition, And Removal Project \| WGI Ohio and DOE \| Maximum
Commitments and Contingencies
Cost-reimbursement at risk							146,000,000
DOE Deactivation, Demolition, And Removal Project \| WGI Ohio
Commitments and Contingencies
Claim to DOE, including additional fees						$ 103,000,000
Possible costs which may exceed contracted amounts						$ 100,000,000
DOE Deactivation, Demolition, And Removal Project \| WGI Ohio \| Minimum
Commitments and Contingencies
Cost-reimbursement at risk							$ 146,000,000

Reportable Segments (Details) $ in Thousands	3 Months Ended		9 Months Ended
Reportable Segments (Details) $ in Thousands	Jun. 30, 2018 USD ($)	Jun. 30, 2017 USD ($)	Jun. 30, 2018 USD ($) segment	Jun. 30, 2017 USD ($)	Sep. 30, 2017 USD ($)
Summarized financial information concerning the Company's reportable segments
Number of reportable segments \| segment			4
Revenue	$ 5,147,920	$ 4,561,467	$ 14,849,662	$ 13,347,014
Gross profit	185,179	175,176	462,603	513,593
Equity in earnings of joint ventures	12,863	66,458	55,621	109,667
General and administrative expenses	(35,159)	(33,944)	(100,046)	(96,427)
Impairment of assets held for sale, including goodwill			(168,178)
Acquisition and integration expenses				(35,409)
(Loss) gain on disposal activities	(2,149)		(2,149)	572
Operating income (loss)	$ 160,734	$ 207,690	$ 247,851	$ 491,996
Gross profit as a % of revenue	3.60%	3.80%	3.10%	3.80%
Total assets	$ 14,727,417		$ 14,727,417		$ 14,396,956
Corporate
Summarized financial information concerning the Company's reportable segments
General and administrative expenses	(31,400)	$ (31,900)	(90,800)	$ (89,900)
Acquisition and integration expenses				(35,400)
Operating income (loss)	(31,400)	(31,900)	(90,800)	(125,300)
Total assets	453,900		453,900		386,200
Design and Consulting Services
Summarized financial information concerning the Company's reportable segments
Revenue	2,105,400	1,863,500	6,052,000	5,571,800
Gross profit	116,100	91,200	314,200	292,500
Equity in earnings of joint ventures	4,200	2,500	14,500	12,600
(Loss) gain on disposal activities				600
Operating income (loss)	$ 120,300	$ 93,700	$ 328,700	$ 305,700
Gross profit as a % of revenue	5.50%	4.90%	5.20%	5.20%
Total assets	$ 7,143,700		$ 7,143,700		6,992,600
Construction Services
Summarized financial information concerning the Company's reportable segments
Revenue	2,106,700	$ 1,841,700	6,120,500	$ 5,324,600
Gross profit	9,100	26,200	22,900	60,400
Equity in earnings of joint ventures	2,300	7,000	16,900	16,600
Impairment of assets held for sale, including goodwill			(168,200)
(Loss) gain on disposal activities	(2,100)		(2,100)
Operating income (loss)	$ 9,300	$ 33,200	$ (130,500)	$ 77,000
Gross profit as a % of revenue	0.40%	1.40%	0.40%	1.10%
Total assets	$ 4,235,900		$ 4,235,900		4,114,500
Management Services
Summarized financial information concerning the Company's reportable segments
Revenue	935,900	$ 856,300	2,677,200	$ 2,450,600
Gross profit	60,000	57,800	125,500	160,700
Equity in earnings of joint ventures	6,300	8,600	24,200	32,100
Operating income (loss)	$ 66,300	$ 66,400	$ 149,700	$ 192,800
Gross profit as a % of revenue	6.40%	6.70%	4.70%	6.60%
Total assets	$ 2,682,300		$ 2,682,300		2,704,600
AECOM Capital
Summarized financial information concerning the Company's reportable segments
Equity in earnings of joint ventures		$ 48,400		$ 48,400
General and administrative expenses	(3,700)	(2,100)	(9,200)	(6,600)
Operating income (loss)	(3,700)	$ 46,300	(9,200)	$ 41,800
Total assets	$ 211,600		$ 211,600		$ 199,100

Condensed Consolidating Financial Information - Debt (Details)	9 Months Ended
	Jun. 30, 2018
Condensed Consolidating Financial Information
Ownership of directly and indirectly owned subsidiaries (as a percent)	100.00%

Condensed Consolidating Financial Information - Balance Sheets (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
CURRENT ASSETS:
Total cash and cash equivalents	$ 801,419	$ 802,362
Accounts receivable-net	5,447,985	5,127,743
Prepaid expenses and other current assets	651,816	696,718
Current assets held for sale	63,303
Income taxes receivable	79,319	55,399
TOTAL CURRENT ASSETS	7,043,842	6,682,222
PROPERTY AND EQUIPMENT-NET	607,151	621,357
DEFERRED TAX ASSETS-NET	181,564	171,331
INVESTMENTS IN UNCONSOLIDATED JOINT VENTURES	398,134	364,223
GOODWILL	5,928,029	5,992,881
INTANGIBLE ASSETS-NET	343,185	415,096
OTHER NON-CURRENT ASSETS	225,512	149,846
TOTAL ASSETS	14,727,417	14,396,956
CURRENT LIABILITIES:
Short-term debt	47,402	1,221
Accounts payable	2,517,234	2,249,872
Accrued expenses and other current liabilities	2,184,672	2,245,519
Income taxes payable	28,493	38,176
Billings in excess of costs on uncompleted contracts	968,778	902,812
Current liabilities held for sale	17,914
Current portion of long-term debt	125,577	140,779
TOTAL CURRENT LIABILITIES	5,890,070	5,578,379
OTHER LONG-TERM LIABILITIES	855,500	881,300
DEFERRED TAX LIABILITY-NET	14,354	20,515
LONG-TERM DEBT	3,707,293	3,702,109
TOTAL LIABILITIES	10,467,283	10,182,270
TOTAL AECOM STOCKHOLDERS' EQUITY	4,077,732	3,996,126
Noncontrolling interests	182,402	218,560
TOTAL STOCKHOLDERS' EQUITY	4,260,134	4,214,686
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	14,727,417	14,396,956
Eliminations
CURRENT ASSETS:
Intercompany receivable	(1,138,000)	(996,000)
TOTAL CURRENT ASSETS	(1,138,000)	(996,000)
DEFERRED TAX ASSETS-NET	(158,600)	(294,600)
INVESTMENTS IN CONSOLIDATED SUBSIDIARIES	(8,936,000)	(9,419,000)
TOTAL ASSETS	(10,232,600)	(10,709,600)
CURRENT LIABILITIES:
Intercompany payable	(1,318,600)	(1,098,300)
TOTAL CURRENT LIABILITIES	(1,318,600)	(1,098,300)
DEFERRED TAX LIABILITY-NET	(158,600)	(294,600)
NOTE PAYABLE INTERCOMPANY-NON CURRENT	(1,158,100)	(467,300)
TOTAL LIABILITIES	(2,635,300)	(1,860,200)
TOTAL AECOM STOCKHOLDERS' EQUITY	(7,597,300)	(8,849,400)
TOTAL STOCKHOLDERS' EQUITY	(7,597,300)	(8,849,400)
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	(10,232,600)	(10,709,600)
Parent \| Reportable Legal Entities
CURRENT ASSETS:
Total cash and cash equivalents	2,000	32,600
Intercompany receivable	812,700	723,600
Prepaid expenses and other current assets	82,700	67,500
Income taxes receivable	27,900	4,300
TOTAL CURRENT ASSETS	925,300	828,000
PROPERTY AND EQUIPMENT-NET	201,800	160,200
DEFERRED TAX ASSETS-NET	127,800	239,700
INVESTMENTS IN CONSOLIDATED SUBSIDIARIES	6,699,700	6,606,200
INVESTMENTS IN UNCONSOLIDATED JOINT VENTURES	12,400	7,200
OTHER NON-CURRENT ASSETS	53,700	8,700
TOTAL ASSETS	8,020,700	7,850,000
CURRENT LIABILITIES:
Short-term debt	6,700	1,100
Accounts payable	51,100	33,800
Accrued expenses and other current liabilities	80,300	92,200
Intercompany payable	180,200	149,200
Billings in excess of costs on uncompleted contracts	2,000	3,400
Current portion of long-term debt	41,700	110,900
TOTAL CURRENT LIABILITIES	362,000	390,600
OTHER LONG-TERM LIABILITIES	140,000	102,300
NOTE PAYABLE INTERCOMPANY-NON CURRENT	675,800	100
LONG-TERM DEBT	2,856,300	3,366,900
TOTAL LIABILITIES	4,034,100	3,859,900
TOTAL AECOM STOCKHOLDERS' EQUITY	3,986,600	3,990,100
TOTAL STOCKHOLDERS' EQUITY	3,986,600	3,990,100
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	8,020,700	7,850,000
Guarantor Subsidiaries \| Reportable Legal Entities
CURRENT ASSETS:
Total cash and cash equivalents	302,800	254,900
Accounts receivable-net	2,628,100	2,426,400
Intercompany receivable	82,800	89,000
Prepaid expenses and other current assets	339,700	366,500
TOTAL CURRENT ASSETS	3,353,400	3,136,800
PROPERTY AND EQUIPMENT-NET	221,300	215,000
DEFERRED TAX ASSETS-NET	56,200	61,700
INVESTMENTS IN CONSOLIDATED SUBSIDIARIES	2,236,300	2,812,800
INVESTMENTS IN UNCONSOLIDATED JOINT VENTURES	55,400	69,700
GOODWILL	3,392,700	3,392,700
INTANGIBLE ASSETS-NET	229,300	271,600
OTHER NON-CURRENT ASSETS	46,300	47,400
TOTAL ASSETS	9,590,900	10,007,700
CURRENT LIABILITIES:
Accounts payable	1,503,200	1,301,700
Accrued expenses and other current liabilities	1,017,600	1,171,800
Income taxes payable		8,100
Intercompany payable	830,700	789,500
Billings in excess of costs on uncompleted contracts	359,100	341,700
Current portion of long-term debt	26,700	14,900
TOTAL CURRENT LIABILITIES	3,737,300	3,627,700
OTHER LONG-TERM LIABILITIES	268,500	290,700
DEFERRED TAX LIABILITY-NET		600
LONG-TERM DEBT	284,800	281,600
TOTAL LIABILITIES	4,290,600	4,200,600
TOTAL AECOM STOCKHOLDERS' EQUITY	5,300,300	5,807,100
TOTAL STOCKHOLDERS' EQUITY	5,300,300	5,807,100
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	9,590,900	10,007,700
Non-Guarantor Subsidiaries \| Reportable Legal Entities
CURRENT ASSETS:
Total cash and cash equivalents	496,600	514,900
Accounts receivable-net	2,819,900	2,701,300
Intercompany receivable	242,500	183,400
Prepaid expenses and other current assets	229,400	262,700
Current assets held for sale	63,300
Income taxes receivable	51,400	51,100
TOTAL CURRENT ASSETS	3,903,100	3,713,400
PROPERTY AND EQUIPMENT-NET	184,100	246,200
DEFERRED TAX ASSETS-NET	156,200	164,500
INVESTMENTS IN UNCONSOLIDATED JOINT VENTURES	330,300	287,300
GOODWILL	2,535,300	2,600,200
INTANGIBLE ASSETS-NET	113,900	143,500
OTHER NON-CURRENT ASSETS	125,500	93,800
TOTAL ASSETS	7,348,400	7,248,900
CURRENT LIABILITIES:
Short-term debt	40,700	100
Accounts payable	962,900	914,400
Accrued expenses and other current liabilities	1,086,800	981,500
Income taxes payable	28,500	30,100
Intercompany payable	307,700	159,600
Billings in excess of costs on uncompleted contracts	607,700	557,700
Current liabilities held for sale	17,900
Current portion of long-term debt	57,200	15,000
TOTAL CURRENT LIABILITIES	3,109,400	2,658,400
OTHER LONG-TERM LIABILITIES	447,000	488,300
DEFERRED TAX LIABILITY-NET	173,000	314,500
NOTE PAYABLE INTERCOMPANY-NON CURRENT	482,300	467,200
LONG-TERM DEBT	566,200	53,600
TOTAL LIABILITIES	4,777,900	3,982,000
TOTAL AECOM STOCKHOLDERS' EQUITY	2,388,100	3,048,300
Noncontrolling interests	182,400	218,600
TOTAL STOCKHOLDERS' EQUITY	2,570,500	3,266,900
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 7,348,400	$ 7,248,900

Condensed Consolidating Financial Information - Operations (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Condensed Consolidating Statements of Operations
Revenue	$ 5,147,920	$ 4,561,467	$ 14,849,662	$ 13,347,014
Cost of revenue	4,962,741	4,386,291	14,387,059	12,833,421
Gross profit	185,179	175,176	462,603	513,593
Equity in earnings of joint ventures	12,863	66,458	55,621	109,667
General and administrative expenses	(35,159)	(33,944)	(100,046)	(96,427)
Impairment of assets held for sale, including goodwill			(168,178)
Acquisition and integration expenses				(35,409)
(Loss) gain on disposal activities	(2,149)		(2,149)	572
Income from operations	160,734	207,690	247,851	491,996
Other income	2,752	2,136	17,542	4,237
Interest expense	(55,213)	(61,547)	(211,955)	(176,985)
Income before income tax expense (benefit)	108,273	148,279	53,438	319,248
Income tax (benefit) expense	33,131	12,205	(38,362)	1,556
Net income	75,142	136,074	91,800	317,692
Noncontrolling interests in income of consolidated subsidiaries, net of tax	(14,232)	(34,747)	(39,309)	(66,790)
Net income attributable to AECOM	60,910	101,327	52,491	250,902
Eliminations
Condensed Consolidating Statements of Operations
Revenue	(26,900)	(48,100)	(68,700)	(52,300)
Cost of revenue	(26,900)	(48,100)	(68,700)	(52,300)
Equity in earnings from subsidiaries	(125,600)	(130,600)	(376,500)	(545,400)
Income from operations	(125,600)	(130,600)	(376,500)	(545,400)
Other income	(10,500)	(8,700)	(23,300)	(27,900)
Interest expense	10,500	8,700	23,300	27,900
Income before income tax expense (benefit)	(125,600)	(130,600)	(376,500)	(545,400)
Net income	(125,600)	(130,600)	(376,500)	(545,400)
Net income attributable to AECOM	(125,600)	(130,600)	(376,500)	(545,400)
Parent \| Reportable Legal Entities
Condensed Consolidating Statements of Operations
Equity in earnings from subsidiaries	84,800	112,500	272,700	396,100
General and administrative expenses	(31,400)	(31,900)	(90,800)	(89,900)
Acquisition and integration expenses				(35,400)
Income from operations	53,400	80,600	181,900	270,800
Other income	400	800	10,800	1,700
Interest expense	(49,000)	(52,600)	(194,300)	(155,500)
Income before income tax expense (benefit)	4,800	28,800	(1,600)	117,000
Income tax (benefit) expense	(56,100)	(72,400)	(54,100)	(133,800)
Net income	60,900	101,200	52,500	250,800
Net income attributable to AECOM	60,900	101,200	52,500	250,800
Guarantor Subsidiaries \| Reportable Legal Entities
Condensed Consolidating Statements of Operations
Revenue	2,818,100	2,604,200	8,230,100	7,699,400
Cost of revenue	2,731,800	2,526,400	7,950,000	7,410,300
Gross profit	86,300	77,800	280,100	289,100
Equity in earnings from subsidiaries	40,800	18,100	103,800	149,300
Equity in earnings of joint ventures	6,900	12,500	30,900	34,500
Income from operations	134,000	108,400	414,800	472,900
Other income	9,600	7,600	20,100	23,600
Interest expense	(5,600)	(6,700)	(14,500)	(18,300)
Income before income tax expense (benefit)	138,000	109,300	420,400	478,200
Income tax (benefit) expense	54,500	37,400	149,400	114,800
Net income	83,500	71,900	271,000	363,400
Net income attributable to AECOM	83,500	71,900	271,000	363,400
Non-Guarantor Subsidiaries \| Reportable Legal Entities
Condensed Consolidating Statements of Operations
Revenue	2,356,800	2,005,400	6,688,300	5,699,900
Cost of revenue	2,257,900	1,908,000	6,505,800	5,475,400
Gross profit	98,900	97,400	182,500	224,500
Equity in earnings of joint ventures	5,900	54,000	24,700	75,200
General and administrative expenses	(3,700)	(2,100)	(9,200)	(6,600)
Impairment of assets held for sale, including goodwill			(168,200)
(Loss) gain on disposal activities	(2,100)		(2,100)	600
Income from operations	99,000	149,300	27,700	293,700
Other income	3,200	2,400	9,900	6,800
Interest expense	(11,200)	(11,000)	(26,500)	(31,100)
Income before income tax expense (benefit)	91,000	140,700	11,100	269,400
Income tax (benefit) expense	34,700	47,100	(133,700)	20,500
Net income	56,300	93,600	144,800	248,900
Noncontrolling interests in income of consolidated subsidiaries, net of tax	(14,200)	(34,800)	(39,300)	(66,800)
Net income attributable to AECOM	$ 42,100	$ 58,800	$ 105,500	$ 182,100

Condensed Consolidating Financial Information - Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Consolidated Statements of Comprehensive Income (Loss)
Net income	$ 75,142	$ 136,074	$ 91,800	$ 317,692
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) on derivatives, net of tax	626	563	(214)	4,263
Foreign currency translation adjustments	(67,255)	46,203	(57,742)	13,164
Pension adjustments, net of tax	15,188	(6,562)	1,553	8,866
Other comprehensive (loss) income, net of tax	(51,441)	40,204	(56,403)	26,293
Comprehensive income, net of tax	23,701	176,278	35,397	343,985
Noncontrolling interests in comprehensive income of consolidated subsidiaries, net of tax	(14,078)	(35,032)	(40,532)	(67,160)
Comprehensive income (loss) attributable to AECOM, net of tax	9,623	141,246	(5,135)	276,825
Eliminations
Consolidated Statements of Comprehensive Income (Loss)
Net income	(125,600)	(130,600)	(376,500)	(545,400)
Other comprehensive income (loss), net of tax:
Comprehensive income, net of tax	(125,600)	(130,600)	(376,500)	(545,400)
Comprehensive income (loss) attributable to AECOM, net of tax	(125,600)	(130,600)	(376,500)	(545,400)
Parent \| Reportable Legal Entities
Consolidated Statements of Comprehensive Income (Loss)
Net income	60,900	101,200	52,500	250,800
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) on derivatives, net of tax	900	500	1,500	4,600
Pension adjustments, net of tax	300	600	1,800	1,900
Other comprehensive (loss) income, net of tax	1,200	1,100	3,300	6,500
Comprehensive income, net of tax	62,100	102,300	55,800	257,300
Comprehensive income (loss) attributable to AECOM, net of tax	62,100	102,300	55,800	257,300
Guarantor Subsidiaries \| Reportable Legal Entities
Consolidated Statements of Comprehensive Income (Loss)
Net income	83,500	71,900	271,000	363,400
Other comprehensive income (loss), net of tax:
Comprehensive income, net of tax	83,500	71,900	271,000	363,400
Comprehensive income (loss) attributable to AECOM, net of tax	83,500	71,900	271,000	363,400
Non-Guarantor Subsidiaries \| Reportable Legal Entities
Consolidated Statements of Comprehensive Income (Loss)
Net income	56,300	93,600	144,800	248,900
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) on derivatives, net of tax	(200)	100	(1,700)	(300)
Foreign currency translation adjustments	(67,200)	46,200	(57,700)	13,200
Pension adjustments, net of tax	14,800	(7,200)	(300)	6,900
Other comprehensive (loss) income, net of tax	(52,600)	39,100	(59,700)	19,800
Comprehensive income, net of tax	3,700	132,700	85,100	268,700
Noncontrolling interests in comprehensive income of consolidated subsidiaries, net of tax	(14,000)	(35,100)	(40,500)	(67,200)
Comprehensive income (loss) attributable to AECOM, net of tax	$ (10,300)	$ 97,600	$ 44,600	$ 201,500

Condensed Consolidating Financial Information - Cash Flows (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Condensed Consolidating Statements of Cash Flows
CASH FLOWS FROM OPERATING ACTIVITIES	$ 242,667	$ 445,357
CASH FLOWS FROM INVESTING ACTIVITIES:
Payment for business acquisitions, net of cash acquired		(1,700)
Proceeds from purchase price adjustment to business acquisition	2,200
Cash acquired from consolidation of joint venture	7,630
Proceeds from disposal of businesses, net of cash disposed	19,537	2,200
Net investment in unconsolidated joint ventures	(63,300)	(10,800)
Net Proceeds from sale of investments		700
Net payments for purchase of investments	(17,500)
Payments for capital expenditures, net of disposals	(65,600)	(58,500)
Net cash used in investing activities	(117,054)	(68,127)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings under credit agreements	7,439,180	4,638,662
Repayments of borrowings under credit agreements	(6,654,873)	(5,635,212)
Proceeds from issuance of unsecured senior notes		1,000,000
Redemption of unsecured senior notes	(800,000)	(179,208)
Prepayment premium on redemption of unsecured senior notes	(34,504)
Cash paid for debt issuance costs	(10,708)	(13,041)
Proceeds from issuance of common stock	27,300	24,717
Proceeds from exercise of stock options	3,200	3,679
Payments to repurchase common stock	(29,342)	(22,332)
Net distributions to noncontrolling interests	(72,736)	(44,603)
Other financing activities	8,702	(29,421)
Net cash used in financing activities	(123,781)	(256,759)
EFFECT OF EXCHANGE RATE CHANGES ON CASH	(2,775)	(157)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(943)	120,314
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	802,362	692,145
CASH AND CASH EQUIVALENTS AT END OF PERIOD	801,419	812,459
Eliminations
CASH FLOWS FROM INVESTING ACTIVITIES:
Net (investment in) receipts from intercompany notes	704,500	25,100
Other intercompany investing activities	(614,800)	(50,000)
Net cash used in investing activities	89,700	(24,900)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net borrowings (repayments) on intercompany notes	(704,500)	(25,100)
Other intercompany financing activities	614,800	50,000
Net cash used in financing activities	(89,700)	24,900
Parent \| Reportable Legal Entities
Condensed Consolidating Statements of Cash Flows
CASH FLOWS FROM OPERATING ACTIVITIES	(59,900)	(123,000)
CASH FLOWS FROM INVESTING ACTIVITIES:
Net investment in unconsolidated joint ventures	(5,200)
Payments for capital expenditures, net of disposals	(19,800)	(17,800)
Net (investment in) receipts from intercompany notes	(85,400)	(2,100)
Other intercompany investing activities	109,900	118,400
Net cash used in investing activities	(500)	98,500
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings under credit agreements	6,701,200	4,630,300
Repayments of borrowings under credit agreements	(6,509,500)	(5,580,000)
Proceeds from issuance of unsecured senior notes		1,000,000
Redemption of unsecured senior notes	(800,000)
Prepayment premium on redemption of unsecured senior notes	(34,500)
Cash paid for debt issuance costs	(10,700)	(13,100)
Proceeds from issuance of common stock	27,300	24,700
Proceeds from exercise of stock options	3,200	3,600
Payments to repurchase common stock	(29,300)	(22,300)
Other financing activities	8,800	(17,000)
Net borrowings (repayments) on intercompany notes	673,300	24,300
Net cash used in financing activities	29,800	50,500
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(30,600)	26,000
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	32,600	1,800
CASH AND CASH EQUIVALENTS AT END OF PERIOD	2,000	27,800
Guarantor Subsidiaries \| Reportable Legal Entities
Condensed Consolidating Statements of Cash Flows
CASH FLOWS FROM OPERATING ACTIVITIES	257,300	548,300
CASH FLOWS FROM INVESTING ACTIVITIES:
Net investment in unconsolidated joint ventures	(9,400)	300
Payments for capital expenditures, net of disposals	(34,200)	(24,500)
Net (investment in) receipts from intercompany notes	(545,300)	(16,000)
Other intercompany investing activities	504,900	(68,400)
Net cash used in investing activities	(84,000)	(108,600)
CASH FLOWS FROM FINANCING ACTIVITIES:
Repayments of borrowings under credit agreements	(14,000)	(25,900)
Redemption of unsecured senior notes		(179,200)
Other financing activities	(26,600)	(65,400)
Net borrowings (repayments) on intercompany notes	(4,800)	(17,400)
Other intercompany financing activities	(80,000)	(149,200)
Net cash used in financing activities	(125,400)	(437,100)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	47,900	2,600
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	254,900	196,300
CASH AND CASH EQUIVALENTS AT END OF PERIOD	302,800	198,900
Non-Guarantor Subsidiaries \| Reportable Legal Entities
Condensed Consolidating Statements of Cash Flows
CASH FLOWS FROM OPERATING ACTIVITIES	45,300	20,100
CASH FLOWS FROM INVESTING ACTIVITIES:
Payment for business acquisitions, net of cash acquired		(1,700)
Proceeds from purchase price adjustment to business acquisition	2,200
Cash acquired from consolidation of joint venture	7,600
Proceeds from disposal of businesses, net of cash disposed	19,500	2,200
Net investment in unconsolidated joint ventures	(48,700)	(11,100)
Net Proceeds from sale of investments		700
Net payments for purchase of investments	(17,500)
Payments for capital expenditures, net of disposals	(11,600)	(16,200)
Net (investment in) receipts from intercompany notes	(73,800)	(7,000)
Net cash used in investing activities	(122,300)	(33,100)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from borrowings under credit agreements	737,900	8,400
Repayments of borrowings under credit agreements	(131,400)	(29,300)
Net distributions to noncontrolling interests	(72,700)	(44,600)
Other financing activities	26,500	53,000
Net borrowings (repayments) on intercompany notes	36,000	18,200
Other intercompany financing activities	(534,800)	99,200
Net cash used in financing activities	61,500	104,900
EFFECT OF EXCHANGE RATE CHANGES ON CASH	(2,800)	(200)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(18,300)	91,700
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	514,900	494,000
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 496,600	$ 585,700