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Debt (Details) - USD ($) $ in Thousands | Jun. 30, 2019 | Sep. 30, 2018 | Oct. 17, 2014
--- | --- | --- | ---
Debt |  |  |
Total debt | $ 3,852,500 | $ 3,673,500 |
Less: Current portion of debt and short-term borrowings | (159,600) | (143,100) |
Less: Unamortized debt issuance costs | (39,600) | (46,700) |
Long-term debt | 3,653,291 | 3,483,746 |
2014 Credit Agreement |  |  |
Debt |  |  |
Total debt | 1,586,500 | 1,433,800 |
2014 Senior Notes |  |  |
Debt |  |  |
Total debt | 800,000 | 800,000 |
2017 Senior Notes |  |  |
Debt |  |  |
Total debt | 1,000,000 | 1,000,000 |
URS Senior Notes |  |  |
Debt |  |  |
Total debt | 248,000 | 247,900 | $ 1,000,000
Other Debt |  |  |
Debt |  |  |
Total debt | $ 218,000 | $ 191,800 |

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