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Borrowings and Credit Arrangements (Tables) | 9 Months Ended
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Jun. 30, 2018
Debt Disclosure [Abstract] |
Company's Borrowings | The Company’s borrowings consisted of the following:
| June 30, 2018 |  | September 30, 2017
Current debt obligations, net of debt discount and deferred issuance costs: |  |  |
Term Loan | $ | 65.4 |  |  | $ | 121.3 |
Revolver | 240.0 |  |  | 345.0 |
Securitization Program | 219.8 |  |  | 200.0 |
Convertible Notes | — |  |  | 484.5 |
Total current debt obligations | $ | 525.2 |  |  | $ | 1,150.8 |
Long-term debt obligations, net of debt discount and deferred issuance costs: |  |  |
Term Loan | 1,394.3 |  |  | 1,190.5 |
2022 Senior Notes | — |  |  | 981.6 |
2025 Senior Notes | 934.6 |  |  | — |
2028 Senior Notes | 393.0 |  |  | — |
Total long-term debt obligations | $ | 2,721.9 |  |  | $ | 2,172.1 |
Total debt obligations | $ | 3,247.1 |  |  | $ | 3,322.9 |
Interest Expense under Convertible Notes | Interest expense under the Convertible Notes was as follows:
| Three Months Ended |  | Nine Months Ended
| June 30, 2018 |  | July 1, 2017 |  | June 30, 2018 |  | July 1, 2017
Amortization of debt discount | $ | — |  |  | $ | 4.4 |  |  | $ | 3.5 |  |  | $ | 14.5 |
Amortization of deferred financing costs | — |  |  | 0.2 |  |  | 0.2 |  |  | 0.7 |
Principal accretion | — |  |  | 3.9 |  |  | 1.6 |  |  | 12.8 |
Non-cash interest expense | — |  |  | 8.5 |  |  | 5.3 |  |  | 28.0 |
2.00% accrued interest (cash) | — |  |  | 1.6 |  |  | 1.8 |  |  | 5.4 |
| $ | — |  |  | $ | 10.1 |  |  | $ | 7.1 |  |  | $ | 33.4 |

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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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