Income Taxes - Changes in Gross Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ (531)	$ (483)
Additions for tax positions of the current year	(19)	(32)
Additions for tax positions of prior years	(99)	(166)
Reductions for tax positions of prior years	100	42
Settlements with tax authorities	24	95
Lapse of statute of limitations	29	13
Balance at end of year	$ (496)	$ (531)