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Income Taxes - Schedule of Effective Tax Rate Reconciliation (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount $ (1,518) $ 299 $ 268
Increase (decrease) in income taxes resulting from:      
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount 39 (2) 8
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount 1 19 5
Effective Income Tax Rate Reconciliation, Prior Year Income Taxes, Amount 48 4 (4)
Effective Income Tax Rate Reconciliation, Tax Exempt Income, Amount 0 52 (6)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount 9 2 0
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount 2 12 14
Income tax expense (benefit) $ (976) $ 386 $ 285
Effective Tax Rate 13.00% 9.00% 13.00%
Revision of Prior Period, Adjustment      
Increase (decrease) in income taxes resulting from:      
Income tax expense (benefit)   $ 63  
Domestic Tax Authority [Member] | Office of the Tax Commissioner, Bermuda [Member]      
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 0.00% 0.00% 0.00%
Foreign Tax Authority [Member] | Internal Revenue Service (IRS)      
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00% 21.00% 21.00%