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Basis of Presentation - Immaterial Error Corrections (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2016 | Jun. 30, 2015 | Sep. 30, 2015
Immaterial Error Corrections |  |  |  |  |
Increase in Goodwill | $ 5,831,409 |  | $ 5,831,409 |  | $ 5,820,692
Increase in Deferred tax assets - net |  |  |  |  | 250,599
Increase in Accrued expenses and other current liabilities | 2,401,555 |  | 2,401,555 |  | 2,167,771
Decrease in Accounts receivable | 4,620,393 |  | 4,620,393 |  | 4,841,450
Decrease in Income tax receivable | 70,923 |  | 70,923 |  | $ 81,161
Impact on Net income attributable to AECOM | 67,444 | $ (17,192) | 88,905 | $ (155,901) |
Immaterial Error Corrections | URS Corporation | Restatement Adjustment |  |  |  |  |
Immaterial Error Corrections |  |  |  |  |
Increase in Goodwill | 38,000 |  | 38,000 |  |
Increase in Deferred tax assets - net | 69,300 |  | 69,300 |  |
Increase in Accrued expenses and other current liabilities | 48,200 |  | 48,200 |  |
Decrease in Accounts receivable | (5,000) |  | (5,000) |  |
Decrease in Income tax receivable | (54,600) |  | (54,600) |  |
Impact on Net income attributable to AECOM | $ 4,800 |  | $ 3,300 |  |

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