Assets Held for Sale (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended	12 Months Ended
	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2021	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Assets Held for Sale [Abstract]
Impairment charges (reversals) - net					$ (55.7)	$ 166.8	$ 8.6
ASSETS [Abstract]
Total assets held for sale					0.0	107.6
LIABILITIES [Abstract]
Total liabilities held for sale					0.0	103.3
Automotive [Member]
Assets Held for Sale [Abstract]
Impairment charges						1.7
Impairment charges (reversals) - net					(56.0)	166.8	$ 7.5
Liquid and Air-Cooled Automotive Businesses [Member] | Held for Sale [Member]
ASSETS [Abstract]
Cash and cash equivalents						8.0
Trade accounts receivables - net						54.4
Inventories						24.7
Other current assets						12.8
Property, plant and equipment - net						164.0
Other noncurrent assets						8.8
Impairment of carrying value						(165.1)
Total assets held for sale						107.6
LIABILITIES [Abstract]
Short-term debt						5.0
Accounts payable						46.3
Accrued compensation and employee benefits						15.5
Other current liabilities						12.2
Pensions						17.8
Other noncurrent liabilities						6.5
Total liabilities held for sale						103.3
Liquid-Cooled Automotive Business [Member]
Assets Held for Sale [Abstract]
Impairment charges	$ (57.2)		$ (7.4)	$ 8.6		138.3
Impairment charges (reversals) - net	$ (57.2)			$ 1.2
Net carrying value of additions to property, plant and equipment		$ 0.0	$ 0.0
Long-lived assets								$ 0.0
Air-Cooled Automotive Business [Member]
Assets Held for Sale [Abstract]
Impairment charges						$ 26.8
ASSETS [Abstract]
Cash and cash equivalents					$ 5.9