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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
Effective Tax Rate
Income before income taxes	$ 2,163	$ 341	$ 3,454	$ 899
Income tax expense	$ 545	$ 92	$ 840	$ 216
Effective income tax rate	25.20%	27.00%	24.30%	24.00%
Uncertain Tax Benefits
Non-current tax liability for uncertain tax benefits	$ 25		$ 25
Uncertain tax benefits, penalties and interest accrued	$ 3		$ 3

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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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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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