Schedule II Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allowance for doubtful accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$ 150	$ 111	$ 113
Additions, charged (credited) to income	5	30	13
Additions, charged (credited) to AOCL	0	0	0
Deductions from reserves	(24)	(11)	(14)
Translation adjustment during period	8	5	(1)
Balance at end of period	123	150	111
Allowance for doubtful accounts | Accounting Standards Update 2016-13 | Revision of Prior Period, Accounting Standards Update, Adjustment
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period		126
Balance at end of period			126
Valuation allowance — deferred tax assets
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	1,469	982	317
Additions, charged (credited) to income	418	488	661
Additions, charged (credited) to AOCL	7	(1)	4
Deductions from reserves	0	0	0
Translation adjustment during period	0	0	0
Balance at end of period	$ 1,044	$ 1,469	$ 982