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Fair Value of Financial Instruments (Tables) | 12 Months Ended
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Mar. 31, 2024
Fair Value Disclosures [Abstract] |
Summary of Carrying Amount and Fair Values | The following table shows the carrying amounts and fair values of the Company's debt obligations (in millions):
| March 31,
| 2024 |  | 2023
| Carrying Amount(1) |  | Fair Value |  | Carrying Amount(1) |  | Fair Value
Revolving Credit Facility | $ | — |  |  | $ | — |  |  | $ | 91.4 |  |  | $ | 100.0 |
2025 Term Loan Facility | 749.3 |  |  | 750.0 |  |  | — |  |  | — |
Commercial Paper | 1,355.1 |  |  | 1,359.0 |  |  | — |  |  | — |
4.333% 2023 Notes | — |  |  | — |  |  | 999.4 |  |  | 997.1 |
2.670% 2023 Notes | — |  |  | — |  |  | 999.4 |  |  | 985.4 |
0.972% 2024 Notes | — |  |  | — |  |  | 1,398.2 |  |  | 1,337.6 |
0.983% 2024 Notes | 999.4 |  |  | 979.6 |  |  | 997.9 |  |  | 941.9 |
4.250% 2025 Notes | 1,195.0 |  |  | 1,181.8 |  |  | 1,191.8 |  |  | 1,176.0 |
5.050% 2029 Notes | 992.6 |  |  | 1,000.6 |  |  | — |  |  | — |
2015 Senior Convertible Debt | 6.7 |  |  | 25.6 |  |  | 12.4 |  |  | 41.8 |
2017 Senior Convertible Debt | 37.9 |  |  | 101.3 |  |  | 81.8 |  |  | 189.6 |
2020 Senior Convertible Debt | 663.8 |  |  | 708.8 |  |  | 661.1 |  |  | 732.1 |
2017 Junior Convertible Debt | — |  |  | — |  |  | 6.5 |  |  | 14.5 |
Total | $ | 5,999.8 |  |  | $ | 6,106.7 |  |  | $ | 6,439.9 |  |  | $ | 6,516.0 |
(1) The carrying amounts presented are net of debt discounts and debt issuance costs (see Note 5 for further information).

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- Definition Tabular disclosure of information pertaining to carrying amount and estimated fair value of short-term and long-term debt instruments or arrangements, including but not limited to, identification of terms, features, and collateral requirements. + References No definition available. + Details
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