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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Income tax benefit (expense)	$ 59	$ 128	$ 76	$ (52)
Income (loss) from continuing operations before income tax benefit (expense)	$ (3)	$ 992	$ 613	$ (1,494)
Effective income tax rate	(1966.70%)	12.90%	12.40%	3.50%
Statutory federal income tax rate	21.00%	21.00%	21.00%	21.00%

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

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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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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