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Fair Value Measurements (Assets and Liabilities Required to be Carried at Fair Value on a Recurring Basis) (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Mar. 31, 2021
--- | --- | ---
Assets: |  |
Interest rate swaps | $ 15.1 | $ 50.8
Other Non-Current Assets |  |
Assets: |  |
Interest rate swaps | 15.1 | 50.8
Other Non-Current Assets | Interest rate swaps, financing element |  |
Liabilities: |  |
Financing element of certain hybrid instruments | 90.6 | 98.2
Fair Value, Measurements, Recurring |  |
Assets: |  |
Equity securities with a readily determinable fair value | 1.8 | 1.8
Forward exchange contracts | 2.0 | 1.5
Interest rate swaps | 105.6 | 149.0
Liabilities: |  |
Forward exchange contracts | (2.6) | (2.6)
Interest rate swaps | (46.5) | (78.4)
Fair Value, Measurements, Recurring | Level 1 |  |
Assets: |  |
Equity securities with a readily determinable fair value | 1.8 | 1.8
Forward exchange contracts | 0.0 | 0.0
Interest rate swaps | 0.0 | 0.0
Liabilities: |  |
Forward exchange contracts | 0.0 | 0.0
Interest rate swaps | 0.0 | 0.0
Fair Value, Measurements, Recurring | Level 2 |  |
Assets: |  |
Equity securities with a readily determinable fair value | 0.0 | 0.0
Forward exchange contracts | 2.0 | 1.5
Interest rate swaps | 105.6 | 149.0
Liabilities: |  |
Forward exchange contracts | (2.6) | (2.6)
Interest rate swaps | $ (46.5) | $ (78.4)

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