Income Taxes - Reconciliation of Beginning and Ending Balances of Total Amounts of Gross Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 62	$ 57	$ 50
Additions to prior years' tax positions	2	0	1
Reductions to prior years' tax positions	0	(1)	0
Additions to current year tax positions	12	6	7
Changes in tax positions due to lapse of statutory limitations		3
Changes in tax positions due to lapse of statutory limitations	(6)		(1)
Foreign currency translation	0	(3)	0
Ending balance	$ 70	$ 62	$ 57