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Debt (Details) - USD ($) $ in Thousands | Jun. 30, 2020 | Sep. 30, 2019 | Oct. 17, 2014
--- | --- | --- | ---
Debt |  |  |
Total debt | $ 2,096,300 | $ 3,352,500 |
Less: Current portion of debt and short-term borrowings | (24,700) | (98,300) |
Less: Unamortized debt issuance costs | (23,600) | (36,200) |
Long-term debt | 2,047,988 | 3,217,985 |
2014 Credit Agreement |  |  |
Debt |  |  |
Total debt |  | 1,182,200 |
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 | 248,200 | 248,100 | $ 1,000,000
Other Debt |  |  |
Debt |  |  |
Total debt | $ 48,100 | $ 122,200 |

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