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Commitments and Contingencies (Details) CAD in Millions, AUD in Millions, $ in Millions |  |  | 1 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Jul. 10, 2015 USD ($) | Jun. 17, 2014 AUD | Dec. 31, 2014 USD ($) | Jan. 31, 2010 CAD | Mar. 31, 2016 USD ($) item | Sep. 30, 2006 AUD
Commitments and Contingencies |  |  |  |  |  |
Securities acquired by investors | AUD |  | AUD 155 |  |  |  |
Standby Letters of Credit |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |
Contingency liability of general and professional liability insurance programs and for payment and performance guarantees |  |  |  |  | $ 484.3 |
DOE Deactivation Demolition And Removal Project | URS Corporation | Washington Group International |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |
Projects costs, maximum |  |  |  |  | 146.0 |
DOE Deactivation Demolition And Removal Project | Department of Energy |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |
Projects costs, minimum |  |  |  |  | 106.0 |
DOE Deactivation Demolition And Removal Project | Department of Energy | URS Corporation | Washington Group International |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |
Projects costs, minimum |  |  |  |  | 106.0 |
Projects costs, maximum |  |  |  |  | $ 146.0 |
Amount recovery ( including additional Fees) |  |  | $ 103.0 |  |  |
Minimum cost to complete the project and promised amenities |  |  | $ 100.0 |  |  |
Canadian Pipeline Contract | URS Corporation | Flint Energy Services Ltd |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |
Damages claimed by applicants | CAD |  |  |  | CAD 45 |  |
AECOM Australia |  |  |  |  |  |
Commitments and Contingencies |  |  |  |  |  |
Payments for Legal Settlements | $ 205.0 |  |  |  |  |
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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