Income Taxes - Geographic Sources of Pretax Income (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Geographic sources of pretax income
United States	$ 3,126	$ 1,685	$ 2,045
Foreign	224	146	187
Pretax income	$ 3,350	$ 1,831	$ 2,232

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