Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Change in reserve for uncertain tax positions, excluding related accrued interest and penalties
Unrecognized tax benefits, beginning of year	$ 301	$ 308	$ 384
Additions for current year tax positions	16	23	15
Additions for prior year tax positions	3	32	18
Reductions for prior year tax positions	(13)	(45)	(34)
Cash settlements	(2)	(6)	(2)
Statute of limitations lapses	(2)	(11)	(9)
Reclassification to deferred income tax liability			(64)
Unrecognized tax benefits, end of year	$ 303	$ 301	$ 308