Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Income Tax Disclosure [Abstract]
Income/(loss) before income taxes	$ 242	$ (247)
Income tax benefit/(provision)	$ (54)	$ 29
Effective tax rate	22.30%	11.70%
Reduction of prior years’ unrecognized tax benefits	$ 54

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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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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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns.

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