Income Taxes - Components of Our Net Deferred Tax Assets (Details) - USD ($) $ in Millions	Dec. 31, 2021	Mar. 31, 2021	Dec. 31, 2020
Deferred tax assets
U.S. federal	$ 11		$ 0
U.S. state	45		34
Non-U.S.	736		630
Tax credits	305		276
Postretirement benefits other than pensions	19		19
Pensions	80		148
Payroll accruals	33		31
Property, plant and equipment	205		244
Research expense capitalized for tax	121		102
Interest expense carryforward	56		0
Intangibles	25		0
Other accruals	205		216
Total deferred tax assets before valuation allowance	1,841		1,700
Less: Valuation allowance	(1,589)	$ (54)	(1,428)
Total deferred tax assets	252		272
Deferred tax liabilities
Intangibles	0		11
Other	91		65
Total deferred tax liabilities	91		76
Net deferred tax assets	$ 161		$ 196