Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Loss before income taxes	$ (382)	$ 0	$ (1,004)	$ (28)
Income tax benefit	$ 22	$ 111	$ 111	$ 134
Effective tax rate	5.80%		11.10%	478.60%

Amount of income (loss) from continuing operations, including income (loss) from equity method investments, before deduction of income tax expense (benefit), and income (loss) attributable to noncontrolling interest.

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