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Recent Accounting Pronouncements - Summary of Balance of and Changes in Assets and Liability Position for MRBs due to ASU 2018-12 Transition (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Balance beginning/ending and adjustments $ 315 $ 165 $ 428  
Less: reinsured market risk benefits       $ 0
Fixed indexed annuities        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Balance beginning/ending and adjustments 314 164 426 478
Less: reinsured market risk benefits       0
Deferred Annuities        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Balance beginning/ending and adjustments $ 1 $ 1 2 1
Less: reinsured market risk benefits       0
As Previously Reported        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Balance beginning/ending and adjustments       531
As Previously Reported | Fixed indexed annuities        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Balance beginning/ending and adjustments       531
As Previously Reported | Deferred Annuities        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Balance beginning/ending and adjustments       0
Adjustment for reversal of AOCI adjustments        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Balance beginning/ending and adjustments       (116)
Adjustment for reversal of AOCI adjustments | Fixed indexed annuities        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Balance beginning/ending and adjustments       (116)
Adjustment for reversal of AOCI adjustments | Deferred Annuities        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Balance beginning/ending and adjustments       0
Remaining cumulative difference (exclusive of the instrument specific credit risk change) between December 31, 2020 carrying amount and fair value measurement for the MRBs        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Balance beginning/ending and adjustments       (95)
Remaining cumulative difference (exclusive of the instrument specific credit risk change) between December 31, 2020 carrying amount and fair value measurement for the MRBs | Fixed indexed annuities        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Balance beginning/ending and adjustments       (96)
Remaining cumulative difference (exclusive of the instrument specific credit risk change) between December 31, 2020 carrying amount and fair value measurement for the MRBs | Deferred Annuities        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Balance beginning/ending and adjustments       1
Cumulative Effect, Period of Adoption, Adjustment        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Balance beginning/ending and adjustments       159
Cumulative Effect, Period of Adoption, Adjustment | Fixed indexed annuities        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Balance beginning/ending and adjustments       159
Cumulative Effect, Period of Adoption, Adjustment | Deferred Annuities        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Balance beginning/ending and adjustments       0
As adjusted        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Balance beginning/ending and adjustments       479
Balance, end of period, net of reinsurance     479  
As adjusted | Fixed indexed annuities        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Balance beginning/ending and adjustments       478
Balance, end of period, net of reinsurance     478  
As adjusted | Deferred Annuities        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Balance beginning/ending and adjustments       $ 1
Balance, end of period, net of reinsurance     $ 1