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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure Of Income Taxes [line items] |  |  |
Income tax expense | $ 2,350 | $ 1,932 | $ 2,786
Effective tax rate | 28.60% | 100.40% | 22.10%

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