Income Taxes - Schedule of Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Income Tax Contingency [Line Items]
(Loss) income before income tax expense (benefit)	$ (233)
Income tax (benefit) expense	$ (47)
Effective tax rate	20.30%
Predecessor
Income Tax Contingency [Line Items]
(Loss) income before income tax expense (benefit)		$ 206
Income tax (benefit) expense		$ 46
Effective tax rate		22.40%