Income Taxes - Provision or Benefit for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Current:
U.S.	$ 1	$ 49	$ (18)
Foreign	614	458	443
Total current	615	507	425
Deferred:
U.S.	0	(6)	(12)
Foreign	157	149	63
Total deferred	157	143	51
Provision for income taxes	$ 772	$ 650	$ 476