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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Tax Disclosure [Abstract]
Income tax (benefit) expense	$ 17	$ (180)
Income (loss) from continuing operations before income tax benefit (expense)	$ 616	$ (2,486)
Effective income tax rate	2.80%	7.20%
Statutory federal income tax rate	21.00%	21.00%

X

- Definition

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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