Income Taxes - Possible Changes of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Reasonably possible change in unrecognized tax benefits
Foreign tax credit carryovers	$ 148	$ 149
Unused foreign tax credits expiring in current year through following nine years	61
Unused foreign tax credits carried over indefinitely	87
Operating and capital loss carryforwards with indefinite life	261
Operating and capital loss carryforwards expiring in current year through following 19 years	78
Unused research tax credits expiring in current year through following 18 years	$ 25
Period during which unrecognized tax benefits are reasonably possible of being settled as a result of audit settlements or statute expirations	12 months
Maximum
Reasonably possible change in unrecognized tax benefits
Reasonably possible decrease in unrecognized tax benefits related to audit settlements or statute expirations	$ 29