Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Unrecognized Tax Benefits
Unrecognized tax benefits		$ 72	$ 73	$ 29
Activity for unrecognized tax benefits [Roll Forward]
Balance at beginning of period	$ 72	73	29	30
Tax positions related to current year additions		2	43	0
Additions for tax positions of prior years		1	1	0
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions		(4)	0	(1)
Balance at end of period		$ 72	$ 73	$ 29
Forecast
Activity for unrecognized tax benefits [Roll Forward]
Reductions due to lapse of statute of limitations on tax positions	(10)
Income Tax Contingency [Line Items]
Unrecognized tax benefits	$ 10