Income Taxes - Schedule of Income Tax Provision and Effective Tax Rate (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Current tax benefit (provision)	$ 11	$ 1	$ 29	$ (10)
Deferred tax benefit (provision)	280	(16)	371	(36)
Income tax benefit (provision)	$ (291)	$ 15	$ (400)	$ 46
Effective tax rate	22.00%	15.00%	23.00%	16.00%