Income Taxes, Unrecognized Tax Benefits and Deferred Tax Asset Valuation Allowances (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Income Taxes [Abstract]
Increase (decrease) in deferred tax asset valuation allowances			$ 2.5	$ 22.0
Income tax benefit from allocation of income tax provision				9.3
Income tax expense related to legal entity restructuring					$ 2.9
Lapse of statute of limitations and settlements					4.5
Valuation allowances			$ 112.2	90.7
U.S. [Member]
Income Taxes [Abstract]
Income tax benefit from impairment charges				(24.4)
Increase (decrease) in deferred tax asset valuation allowances					8.4
Term of cumulative loss position			3 years
Valuation allowances			$ 85.8
Foreign Jurisdictions [Member]
Income Taxes [Abstract]
Income tax benefit from impairment charges				(13.3)
Income tax expense (benefit) related to change in deferred tax asset valuation allowance	$ 1.6	$ (13.0)	$ (11.4)
Increase (decrease) in deferred tax asset valuation allowances					(1.3)
Term of cumulative loss position			3 years
Valuation allowances			$ 26.4
Deferred Tax Assets for Charges Recorded [Member]
Income Taxes [Abstract]
Increase (decrease) in deferred tax asset valuation allowances				116.5	9.2
Deferred Tax Assets for Charges Recorded [Member] | U.S. [Member]
Income Taxes [Abstract]
Increase (decrease) in deferred tax asset valuation allowances				103.3
Deferred Tax Assets for Charges Recorded [Member] | Foreign Jurisdictions [Member]
Income Taxes [Abstract]
Increase (decrease) in deferred tax asset valuation allowances				$ 13.2
Italy [Member]
Income Taxes [Abstract]
Tax benefit from recognition of tax credits					$ (1.4)