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Market Risk Benefits - Schedule of Balances and Changes in Market Risk Benefit (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Indexed Annuities    
Market Risk Benefit [Line Items]    
Balance beginning of period $ 314 $ 164
Balance, beginning of period, before effect of changes in the instrument-specific credit risk 209 102
Issuances and benefit payments 109 (10)
Attributed fees collected and interest accrual 147 131
Actual policyholder behavior different from expected (5) 27
Changes in assumptions and other 24 29
Effects of market related movements (162) (70)
Balance, end of period, before effect of changes in the instrument-specific credit risk 322 209
Issuances and benefit payments 109 (10)
Attributed fees collected and interest accrual 147 131
Actual policyholder behavior different from expected (5) 27
Changes in assumptions and other 24 29
Effects of market related movements (162) (70)
Effect of changes in the instrument-specific credit risk 98 105
Balance, end of period 420 314
Less: reinsured market risk benefits 61 0
Balance, end of period, net of reinsurance $ 359 $ 314
Weighted-average attained age of policyholders weighted by total AV (years) 67 years 11 months 23 days 68 years 3 months 10 days
Net amount at risk $ 1,327 $ 1,059
Fixed rate annuities    
Market Risk Benefit [Line Items]    
Balance beginning of period 1 1
Balance, beginning of period, before effect of changes in the instrument-specific credit risk 1 1
Issuances and benefit payments 0 0
Attributed fees collected and interest accrual 0 0
Actual policyholder behavior different from expected 0 0
Changes in assumptions and other 0 0
Effects of market related movements 0 0
Balance, end of period, before effect of changes in the instrument-specific credit risk 1 1
Issuances and benefit payments 0 0
Attributed fees collected and interest accrual 0 0
Actual policyholder behavior different from expected 0 0
Changes in assumptions and other 0 0
Effects of market related movements 0 0
Effect of changes in the instrument-specific credit risk 0 0
Balance, end of period 1 1
Less: reinsured market risk benefits 0 0
Balance, end of period, net of reinsurance $ 1 $ 1
Weighted-average attained age of policyholders weighted by total AV (years) 72 years 6 months 29 days 72 years 7 months 2 days
Net amount at risk $ 2 $ 2