Income Taxes - Schedule of Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Reconciliation of unrecognized tax benefits
Balance at beginning of period	$ 6	$ 1	$ 17
Additions for tax positions of current period	1	0	0
Additions for tax positions of prior periods	0	5	0
Reductions for tax positions of prior periods	0	0	(16)
Balance at end of period	$ 7	$ 6	$ 1