Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Unrecognized Tax Benefits [Roll Forward]
Unrecognized tax benefits, beginning balance	$ 27	$ 33	$ 33
Additions for tax positions related to current year	0	0	0
(Reductions) for tax positions related to prior years	(3)	(6)	0
Unrecognized tax benefits, ending balance	$ 24	$ 27	$ 33