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Fair Value Measurements (Carrying Values And Fair Values Of Assets and Liabilities Not Required to be Carried at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions | Jun. 30, 2020 | Mar. 31, 2020
--- | --- | ---
Senior Notes | 5.875% Senior Notes |  |
Fair Value, Carrying Values and Fair Values of Assets and Liabilities Not Required to be Carried at Fair Value on a Recurring Basis [Line Items] |  |
Coupon rate | 5.875% |
Senior Notes | 6.375% Senior Notes |  |
Fair Value, Carrying Values and Fair Values of Assets and Liabilities Not Required to be Carried at Fair Value on a Recurring Basis [Line Items] |  |
Coupon rate | 6.375% |
Carrying Value |  |
Liabilities: |  |
Financing component of interest rate swaps, fair value disclosure | $ 144.2 | $ 0.0
Carrying Value | Term Loan | Term Loan A |  |
Liabilities: |  |
Loans, fair value disclosure | 687.7 | 699.8
Carrying Value | Term Loan | Term Loan B |  |
Liabilities: |  |
Loans, fair value disclosure | 950.4 | 952.9
Carrying Value | Senior Notes | 5.875% Senior Notes |  |
Liabilities: |  |
Senior Notes, fair value disclosure | 504.7 | 504.0
Carrying Value | Senior Notes | 6.375% Senior Notes |  |
Liabilities: |  |
Senior Notes, fair value disclosure | 539.6 | 539.2
Carrying Value | Production Loans | Production Loans |  |
Liabilities: |  |
Loans, fair value disclosure | 153.3 | 151.3
Fair Value | Fair Value (Level 2) |  |
Liabilities: |  |
Financing component of interest rate swaps, fair value disclosure | 145.2 | 0.0
Fair Value | Fair Value (Level 2) | Term Loan | Term Loan A |  |
Liabilities: |  |
Loans, fair value disclosure | 660.9 | 637.7
Fair Value | Fair Value (Level 2) | Term Loan | Term Loan B |  |
Liabilities: |  |
Loans, fair value disclosure | 909.1 | 845.7
Fair Value | Fair Value (Level 2) | Senior Notes | 5.875% Senior Notes |  |
Liabilities: |  |
Senior Notes, fair value disclosure | 499.7 | 430.5
Fair Value | Fair Value (Level 2) | Senior Notes | 6.375% Senior Notes |  |
Liabilities: |  |
Senior Notes, fair value disclosure | 532.0 | 452.9
Fair Value | Fair Value (Level 2) | Production Loans | Production Loans |  |
Liabilities: |  |
Loans, fair value disclosure | $ 153.3 | $ 151.3

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