Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Unrecognized Tax Benefits [Roll Forward]
Balance as of January 1	$ 373	$ 206	$ 178
Additions based on tax positions related to the current year	41	54	10
Additions for tax positions of prior years	6	127	24
Reductions for tax positions of prior years	(6)	(3)	(5)
Settlements and lapse of statute of limitations	(3)	(11)	(1)
Balance as of December 31	$ 411	$ 373	$ 206