XML 65 R44.htm IDEA: XBRL DOCUMENT
v3.5.0.2

Other Financial Information (Tables) | 12 Months Ended
--- | ---
Sep. 30, 2016
Other Financial Information |
Schedule of accrued expenses and other current liabilities |
|  | Fiscal Year Ended |
|  | September 30, 2016 |  | September 30, 2015 |
|  | (in millions) |
Accrued salaries and benefits |  | $ | 964.9 |  | $ | 852.2 |
Accrued contract costs |  |  | 1,009.8 |  |  | 993.1 |
Other accrued expenses |  |  | 410.1 |  |  | 322.5 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
|  | $ | 2,384.8 |  | $ | 2,167.8 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​

X
- References No definition available. + Details
Name: | acm_OtherFinancialInformationDisclosureAbstract
Namespace Prefix: | acm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the components of accrued liabilities. + References No definition available. + Details
Name: | us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration