XML 56 R45.htm IDEA: XBRL DOCUMENT v3.7.0.1

Debt - 2014 Credit Agreement (Details) $ in Millions		6 Months Ended	9 Months Ended
	Sep. 29, 2016 USD ($)	Mar. 31, 2017	Jun. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Oct. 17, 2014 USD ($)
Term loan A
Debt agreements
Borrowing capacity	$ 185.0
2014 Credit Agreement | Term loan A
Debt agreements
Borrowing capacity	$ 185.0				$ 1,925.0
2014 Credit Agreement | Term loan B
Debt agreements
Borrowing capacity					760.0
2014 Credit Agreement | Revolving credit facility
Debt agreements
Borrowing capacity					1,050.0
Outstanding letters of credit			$ 58.4	$ 92.3
Remaining borrowing capacity under the credit facility			$ 991.6	$ 888.4
2014 Credit Agreement | Line of Credit
Debt agreements
Maximum increase in borrowing capacity					$ 500.0
Maximum consolidated leverage ratio	5.00	4.75
Consolidated leverage ratio			4.4
Consolidated interest coverage ratio			4.4
2014 Credit Agreement | Secured | Line of Credit
Debt agreements
Borrowing capacity	$ 500.0

X

- Definition

Represents the consolidated interest coverage ratio.

+ References

No definition available.

+ Details

Name:	acm_ConsolidatedInterestCoverageRatio
Namespace Prefix:	acm_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the consolidated leverage ratio.

+ References

No definition available.

+ Details

Name:	acm_ConsolidatedLeverageRatio
Namespace Prefix:	acm_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Ratio related to maximum consolidated leverage.

+ References

No definition available.

+ Details

Name:	acm_DebtInstrumentFinancialCovenantsMaximumConsolidatedLeverageRatio
Namespace Prefix:	acm_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the maximum amount of increase in borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

No definition available.

+ Details

Name:	acm_LineOfCreditFacilityMaximumIncreaseInBorrowingCapacity
Namespace Prefix:	acm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_CreditFacilityAxis=acm_TermLoanFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DebtInstrumentAxis=acm_CreditAgreement2014Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=acm_TermLoanBFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: