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Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Dec. 31, 2022
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2019
Sep. 30, 2022
Sep. 30, 2021
Income Tax Examination [Line Items]            
Income tax expense (benefit) rate   31.00% 18.70%   52.60% (25.30%)
IRS            
Income Tax Examination [Line Items]            
Possible increase in U.S. taxable income       $ 696    
Possible additional federal tax expense       $ 244    
IRS | Subsequent Event            
Income Tax Examination [Line Items]            
Possible increase in U.S. taxable income $ 1,413          
Possible additional federal tax expense $ 494