Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 1	$ 1	$ 10
Decrease for tax positions taken during prior period	(1)	0	(9)
Increase for tax positions taken during current period	0	0	0
Ending balance	$ 0	$ 1	$ 1