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Fair Value of Financial Instruments (Tables) | 9 Months Ended
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Dec. 31, 2020
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 as of December 31, 2020 and March 31, 2020 (in millions):
|  |  |  |  | December 31, 2020 |  | March 31, 2020
|  |  |  |  |  |  |  |  | Carrying Amount (1) |  | Fair Value |  | Carrying Amount (1) |  | Fair Value
Revolving Credit Facility |  |  |  |  |  |  |  |  | $ | 2,345.5 |  |  | $ | 2,356.6 |  |  | $ | 2,373.9 |  |  | $ | 2,388.5 |
Term Loan Facility |  |  |  |  |  |  |  |  | — |  |  | — |  |  | 1,708.9 |  |  | 1,723.5 |
Bridge Loan Facility |  |  |  |  |  |  |  |  | — |  |  | — |  |  | 608.8 |  |  | 615.0 |
3.922% 2021 Notes |  |  |  |  |  |  |  |  | 997.5 |  |  | 1,014.0 |  |  | 993.1 |  |  | 985.0 |
4.333% 2023 Notes |  |  |  |  |  |  |  |  | 991.4 |  |  | 1,083.0 |  |  | 988.8 |  |  | 990.0 |
2.670% 2023 Notes |  |  |  |  |  |  |  |  | 996.1 |  |  | 1,047.2 |  |  | — |  |  | — |
0.972% 2024 Notes |  |  |  |  |  |  |  |  | 1,393.7 |  |  | 1,403.6 |  |  | — |  |  | — |
4.250% 2025 Notes |  |  |  |  |  |  |  |  | 1,184.7 |  |  | 1,257.0 |  |  | — |  |  | — |
2015 Senior Convertible Debt |  |  |  |  |  |  |  |  | 187.9 |  |  | 665.8 |  |  | 910.1 |  |  | 1,601.8 |
2017 Senior Convertible Debt |  |  |  |  |  |  |  |  | 352.0 |  |  | 914.3 |  |  | 1,552.8 |  |  | 2,130.3 |
2020 Senior Convertible Debt |  |  |  |  |  |  |  |  | 548.6 |  |  | 736.7 |  |  | — |  |  | — |
2017 Junior Convertible Debt |  |  |  |  |  |  |  |  | 143.6 |  |  | 561.9 |  |  | 345.8 |  |  | 656.2 |
Total |  |  |  |  |  |  |  |  | $ | 9,141.0 |  |  | $ | 11,040.1 |  |  | $ | 9,482.2 |  |  | $ | 11,090.3 |
(1) The carrying amounts presented are net of debt discounts and debt issuance costs (see Note 6 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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