Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income tax expense (benefit) from continuing operations	$ 95	$ (90)	$ 3	$ 21
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		$ (200)