Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 68	$ 97
Additions based on tax positions related to the current year	10	15
Additions for tax positions of prior years	1	0
Reductions based on tax positions related to the current year	(6)	(12)
Reductions for tax positions of prior years	0	(23)
Statute of limitations	(1)	0
Interest and penalties	1	(9)
Ending balance	$ 73	$ 68