SCHEDULE II Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-09, Allowance, Credit Loss
Allowance for valuation and qualifying accounts
Balance at Beginning of Period	$ 81	$ 31	$ 35
Additions	(2)	56	9
Deductions	25	12	13
Balance at End of Period	54	81	31
SEC Schedule, 12-09, Allowance, Credit Loss | Cumulative Effect, Period of Adoption, Adjusted Balance
Allowance for valuation and qualifying accounts
Balance at Beginning of Period		37
Balance at End of Period			37
Tax-Related valuation allowance
Allowance for valuation and qualifying accounts
Balance at Beginning of Period	298	189	228
Additions		109
Deductions	238		39
Balance at End of Period	$ 60	$ 298	$ 189