XML 12 R54.htm IDEA: XBRL DOCUMENT v2.4.0.8
Commitments and Contingencies (Details)
In Millions, unless otherwise specified
 6 Months Ended 12 Months Ended 1 Months Ended
Mar. 31, 2014
Standby letters of credit
USD ($)
Mar. 31, 2014
Global Linguists Solutions Joint Venture
USD ($)
Mar. 31, 2014
AECOM Australia
item
Sep. 30, 2006
AECOM Australia
AUD
Apr. 30, 2014
Hawaii Project
Subsequent event
USD ($)
Commitments and Contingencies          
Contingency liability of general and professional liability insurance programs and for payment and performance guarantees $ 285.1        
Amount withheld by the U.S. government for payments due under a contract because of a dispute   19      
Proceeds from initial public offering (IPO)       700  
Bank loan       1,400.0  
Number of initial public offering investors     770    
Amount agreed to pay by subsidiary as a community service payment to a nonprofit organization under non-prosecution agreement         $ 1.35