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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Income Tax Disclosure [Abstract]        
Decrease in unrecognized tax benefits within the next twelve months $ 200   $ 200  
Increase in unrecognized tax benefits within the next twelve months 20   20  
Amount of potential additional income tax expense related to an IRS notice of proposed adjustment subject to interest and penalties. $ 370   $ 370  
Effective tax rate 22.80% 18.70% 24.50% 13.90%
U.S. corporate income tax rate     21.00%