Income Taxes - Summary of 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]
Earnings (losses) before income taxes	$ (3,302)	$ (324)	$ 1,544	$ 4,349
Provision (benefit) for income taxes	$ (582)	$ 632	$ 693	$ 1,817
Income tax rate	17.60%	(195.10%)	44.90%	41.80%

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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+ Details

- Definition

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

+ References + Details