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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2019
Sep. 30, 2023
Sep. 30, 2022
Income Tax Examination [Line Items]          
Income tax rate 31.20% 31.00%   34.80% 52.60%
IRS          
Income Tax Examination [Line Items]          
Possible increase in U.S. taxable income $ 1,232   $ 696    
Possible additional federal tax expense 431   $ 244    
Liability adjustment for tax expense $ 120     $ 120  
Payments for legal settlements       113  
Tax provision       $ 67