XML 40 R29.htm IDEA: XBRL DOCUMENT
v3.19.1

Derivative Financial Instruments and Fair Value Measurements (Tables) | 6 Months Ended
--- | ---
Mar. 31, 2019
Derivative Financial Instruments and Fair Value Measurements |
Notional principle, fixed rates and related expiration dates of outstanding interest rate swap agreements |
March 31, 2019
Notional Amount |  | Notional Amount |  | Fixed |  | Expiration
Currency |  | (in millions) |  | Rate |  | Date
AUD |  | 200.0 |  | 2.19 | % | February 2021
CAD |  | 400.0 |  | 2.49 | % | September 2022
USD |  | 200.0 |  | 2.60 | % | February 2023
September 30, 2018
Notional Amount |  | Notional Amount |  | Fixed |  | Expiration
Currency |  | (in millions) |  | Rate |  | Date
AUD |  | 200.0 |  | 2.19 | % | February 2021
CAD |  | 400.0 |  | 2.49 | % | September 2022
USD |  | 200.0 |  | 2.60 | % | February 2023

X
- Definition Disclosure information pertaining to derivative instruments and fair value measurements. + References No definition available. + Details
Name: | acm_DerivativeInstrumentHedgingActivitiesAndFairValueMeasurements
Namespace Prefix: | acm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the notional amounts, fixed rates and related expiration dates of outstanding derivative positions. + References No definition available. + Details
Name: | acm_ScheduleOfNotionalAmountsAndFixedRatesAndExpirationDatesOfOutstandingDerivativePositionsTableTextBlock
Namespace Prefix: | acm_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration