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Market Risk Benefits - Balances and Changes in Market Risk Benefit (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Market Risk Benefit [Line Items]        
Balance beginning of period $ 165 $ 428    
Balance, end of period 218 165 $ 428  
As Previously Reported        
Market Risk Benefit [Line Items]        
Balance beginning of period     531  
Balance, end of period       $ 531
FIA        
Market Risk Benefit [Line Items]        
Balance beginning of period 164 426 478  
Balance, beginning of period, before effect of changes in the instrument-specific credit risk 104 280 320  
Issuances and benefit payments (4) (21)   (9)
Attributed fees collected and interest accrual 30 107   99
Actual policyholder behavior different from expected 7 43   (22)
Changes in assumptions and other 1 (76)   0
Effects of market related movements 26 (231)   (108)
Balance, end of period, before effect of changes in the instrument-specific credit risk   104 280 320
Effect of changes in the instrument-specific credit risk 53 62 146  
Balance, end of period $ 217 $ 164 $ 426 478
Weighted-average attained age of policyholders weighted by total AV (years) 68 years 5 months 26 days 68 years 7 months 2 days 68 years 11 months 12 days  
Weighted-average attained age of policyholders weighted by Unlocked MRB (years) 78 years 3 months 29 days 80 years 10 months 2 days 68 years 9 months 7 days  
Net amount at risk $ 1,031 $ 952 $ 1,304  
FIA | As Previously Reported        
Market Risk Benefit [Line Items]        
Balance beginning of period     531  
Balance, beginning of period, before effect of changes in the instrument-specific credit risk 102 280    
Balance, end of period, before effect of changes in the instrument-specific credit risk 164 102 280  
Balance, end of period       531
Fixed Rate Annuities        
Market Risk Benefit [Line Items]        
Balance beginning of period 1 2 1  
Balance, beginning of period, before effect of changes in the instrument-specific credit risk 1 1 1  
Issuances and benefit payments 0 0   0
Attributed fees collected and interest accrual 0 1   1
Actual policyholder behavior different from expected 0 0   0
Changes in assumptions and other 0 0   0
Effects of market related movements 0 (1)   0
Balance, end of period, before effect of changes in the instrument-specific credit risk   1 1 1
Effect of changes in the instrument-specific credit risk 0 0 0  
Balance, end of period $ 1 $ 1 $ 2 1
Weighted-average attained age of policyholders weighted by total AV (years) 72 years 7 months 20 days 72 years 10 months 17 days 73 years 1 month 6 days  
Weighted-average attained age of policyholders weighted by Unlocked MRB (years) 77 years 8 months 23 days 77 years 6 months 21 days 73 years 8 months 19 days  
Net amount at risk $ 3 $ 3 $ 4  
Fixed Rate Annuities | As Previously Reported        
Market Risk Benefit [Line Items]        
Balance beginning of period     0  
Balance, beginning of period, before effect of changes in the instrument-specific credit risk 1 2    
Balance, end of period, before effect of changes in the instrument-specific credit risk $ 1 $ 1 $ 2  
Balance, end of period       $ 0