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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Tax Disclosure [Abstract]
Income tax expense (benefit)	$ (1,940)	$ (165)	$ (4,047)	$ 1,591
Increase (decrease) in income before income tax expense	8,100		21,150
Income (loss) before income tax expense	$ 8,055	$ (44)	$ 14,654	$ (6,496)
Effective tax rates	24.00%	(375.00%)	28.00%	24.00%

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Increase (Decrease) in Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest

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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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