Income Taxes - Uncertain Tax Positions (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance, beginning of period	$ 17	$ 15	$ 16	$ 15
Gross increases - tax positions in current period	1	0	2	0
Balance, end of period	$ 18	$ 15	$ 18	$ 15