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v3.20.1

Debt (Tables) | 6 Months Ended
--- | ---
Mar. 31, 2020
Debt |
Schedule of debt | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | March 31, |  | September 30,
​ | ​ | 2020 | ​ | 2019
​ | ​ | (in millions)
2014 Credit Agreement | ​ | $ | — | ​ | $ | 1,182.2
2014 Senior Notes | ​ | ​ | 800.0 | ​ | ​ | 800.0
2017 Senior Notes | ​ | ​ | 1,000.0 | ​ | ​ | 1,000.0
URS Senior Notes | ​ | ​ | 248.1 | ​ | ​ | 248.1
Other debt | ​ |  | 105.0 | ​ |  | 122.2
Total debt | ​ |  | 2,153.1 | ​ |  | 3,352.5
Less: Current portion of debt and short-term borrowings | ​ |  | (52.4) | ​ |  | (98.3)
Less: Unamortized debt issuance costs | ​ | ​ | (21.6) | ​ | ​ | (36.2)
Long-term debt | ​ | $ | 2,079.1 | ​ | $ | 3,218.0
Schedule of maturities of debt | ​
​ | ​ | ​ | ​
Fiscal Year |  | ​ | ​
2020 (six months remaining) | ​ | $ | 39.8
2021 | ​ |  | 25.2
2022 | ​ |  | 269.9
2023 | ​ |  | 13.2
2024 | ​ | ​ | 4.7
Thereafter | ​ |  | 1,800.3
Total | ​ | $ | 2,153.1

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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