Income Taxes - Schedule of Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Income Tax Disclosure [Abstract]
(Loss) income before income tax (benefit) expense	$ (117)	$ 79	$ (350)	$ 285
Income tax (benefit) expense	$ (29)	$ 21	$ (76)	$ 67
Effective tax rate	24.60%	26.50%	21.70%	23.60%