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Commitments and Contingencies (Details) CAD in Millions, AUD in Millions |  |  |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Dec. 06, 2014 USD ($) | Oct. 17, 2014 USD ($) project item | Jun. 17, 2014 AUD | Aug. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Jan. 31, 2010 CAD | Sep. 30, 2015 USD ($) employee item | Sep. 30, 2006 AUD | Oct. 24, 2014 USD ($)
Commitments and Contingencies |  |  |  |  |  |  |  |  |
Securities acquired by investors | AUD |  |  | AUD 155 |  |  |  |  |  |
URS Energy & Construction |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |
Damages claimed by applicants |  |  |  | $ 4,100,000 |  |  |  |  |
Number of former employees who filed claims against our affiliate | employee |  |  |  |  |  |  | 2 |  |
URS Corporation |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |
Bank loan |  |  |  |  |  |  |  |  | $ 5.00
Standby Letters of Credit |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |
Contingency liability of general and professional liability insurance programs and for payment and performance guarantees |  |  |  |  |  |  | $ 436,500,000 |  |
USAID Egyptian Projects | URS Corporation | Washington Group International |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |
Number of subcontractors | item |  | 2 |  |  |  |  |  |  |
Number of projects failed to comply USAID regulations | project |  | 5 |  |  |  |  |  |  |
Amount paid to WGI from the federal government for completed and operational projects ( including doubling and trebling of damages) |  | $ 373,000,000 |  |  |  |  |  |  |
DOE Deactivation Demolition And Removal Project Member | URS Corporation | Washington Group International |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |
Projects costs, minimum |  |  |  |  |  |  | 146,000,000 |  |
DOE Deactivation Demolition And Removal Project Member | Department of Energy Member |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |
Projects costs, minimum |  |  |  |  |  |  | 106,000,000 |  |
DOE Deactivation Demolition And Removal Project Member | Department of Energy Member | URS Corporation | Washington Group International |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |
Projects costs, minimum |  |  |  |  |  |  | 106,000,000 |  |
Projects costs, maximum |  |  |  |  |  |  | $ 146,000,000 |  |
Amount recovery ( including additional Fees) |  |  |  |  | $ 103,000,000 |  |  |  |
Minimum cost to complete the project and promised amenities |  |  |  |  | $ 100,000,000 |  |  |  |
Canadian Pipeline Contract Member | URS Corporation | Flint Energy Services Ltd |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |
Damages claimed by applicants | CAD |  |  |  |  |  | CAD 85 |  |  |
Waste Isolation Pilot Plant Environmental Incidents Member | URS Corporation | Nuclear Waste Partnership LLC |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |
Civil penalty Amount | $ 17,700,000 |  |  |  |  |  |  |  |
AECOM Australia |  |  |  |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |  |  |  |
Proceeds from initial public offering (IPO) | AUD |  |  |  |  |  |  |  | AUD 700 |
Bank loan | AUD |  |  |  |  |  |  |  | AUD 1,400 |
Number of initial public offering investors | item |  |  |  |  |  |  | 770 |  |

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