Income Taxes - Unrecognized Tax Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Unrecognized tax benefits:
Balance, January 1	$ 245	$ 227	$ 173
Increases as a result of tax positions taken during the current year	32	26	18
Decreases of tax positions taken during prior years	(21)	(20)	(5)
Increases of tax positions taken during prior years	46	40	57
Decreases as a result of settlements with taxing authorities and the expiration of statutes of limitations	(2)	(23)	(19)
Effect of foreign currency rate movements	(2)	(5)	3
Balance, December 31	$ 298	$ 245	$ 227