Income Taxes (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Net deferred tax asset	$ 440		$ 104
Increase in net deferred tax asset	$ 336
Effective tax rate	26.10%	21.30%
Unrecognized tax benefits, including related interest and penalties	$ 13		$ 12