Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Income Tax Disclosure [Line Items]
Federal tax credits for alternative fuel vehicles and plug-in vehicles	$ 0	$ 52,000,000
Tax credits for research and development	0	10,000,000
Tax credits for foreign tax	3,000,000	1,000,000
Valuation Allowance	9,000,000	13,000,000
Unremitted earnings in foreign subsidiary	251,000,000	243,000,000
Income tax payable	35,000,000	47,000,000
Unrecognized tax benefits would effect on effective tax rate	14,000,000	17,000,000	$ 6,000,000
Net decrease in unrecognized tax benefits	3,000,000
Income Tax Penalties Accrued	0	0	$ 0
Federal [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforwards	$ 0	0
Tax credit carryforward, Expiration Date	Mar. 31, 2028
State [Member]
Income Tax Disclosure [Line Items]
Operating loss carryforwards	$ 25,000,000	$ 37,000,000
Expiration Dates	Mar. 31, 2023