Income Taxes - Schedule of Changes in Valuation Allowance (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation Allowance, beginning balance	$ 364	$ 329	$ 325
Change in estimates recorded to deferred income tax expense	14	19	8
Changes in losses and credits	0	3	(2)
(Reductions) additions related to other comprehensive income	(22)	13	(2)
Valuation Allowance, ending balance	$ 356	$ 364	$ 329