Schedule II - Valuation and Qualifying Accounts (Details) - Valuation Allowance for Deferred Tax Assets [Member] - USD ($) $ in Millions		12 Months Ended
		Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Valuation and Qualifying Accounts [Roll Forward]
Balance at beginning of period		$ 112.2	$ 90.7	$ 46.9
Additions charged (benefit) to costs and expenses		(49.7)	(4.6)	86.2
Additions charged to other accounts	[1]	(0.9)	(1.0)	2.8
Reclassified as held for sale		0.0	27.1	(45.2)
Balance at end of period		$ 61.6	$ 112.2	$ 90.7

[1] Foreign currency translation and other adjustments.