Income Taxes (Current and Deferred Income Tax Provision (Benefits)) (Details) - USD ($) $ in Millions	12 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Current provision (benefit):
Federal	$ 11.0	$ 5.0	$ (0.6)
States	10.7	2.9	3.0
International	8.4	5.8	1.8
Total current provision (benefit)	30.1	13.7	4.2
Deferred provision (benefit):
Federal	0.9	1.1	(18.5)
States	(2.6)	2.3	(1.8)
International	0.0	0.0	19.4
Total deferred provision (benefit)	(1.7)	3.4	(0.9)
Total provision for income taxes	$ 28.4	$ 17.1	$ 3.3

Amount of current federal tax expense (benefit) pertaining to income (loss) from continuing operations.

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