Financial Instruments (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
Mar. 31, 2022	Mar. 31, 2021
Derivative [Line Items]
Remaining maturity of forward foreign exchange contracts, maximum	30 months
Foreign currency cash flow hedge gain estimated to be reclassified into earnings during next 12 months	$ 1.8
Interest rate swap cash flow hedge loss estimated to be reclassified into earnings during next 12 months	20.6
Interest Rate Swap
Derivative [Line Items]
Gross amount of swaps in an asset position subject to master netting arrangement	169.6	$ 211.2
Gross amount of swaps in an liability position subject to master netting arrangement	147.3	236.3
Net asset of swaps subject to master netting arrangement	32.0	50.8
Net liability of swaps subject to master netting arrangement	$ 9.8	$ 75.9

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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