v3.24.2.u1
Market Risk Benefits - Rollforward of market risk benefits (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Dec. 31, 2022
Market Risk Benefit [Roll Forward]        
Balance, beginning of year $ 4,870 $ 4,034    
Effect of changes in our own credit risk (987) (611) $ (1,160) $ (465)
Balance, beginning of year, before effect of changes in our own credit risk 3,710 3,569    
Issuances 327 398    
Interest accrual 84 86    
Attributed fees 368 475    
Expected claims (35) (49)    
Effect of changes in interest rates (653) 37    
Effect of changes in interest rate volatility 25 (88)    
Effect of changes in equity markets (732) (921)    
Effect of changes in equity index volatility (39) 4    
Actual outcome different from model expected outcome (41) 105    
Effect of changes in other future expected assumptions (5) (123)    
Other, including foreign exchange (2) (2)    
Balance, end of period before effect of changes in our own credit risk 3,007 3,491    
Effect of changes in our own credit risk 987 611 1,160 465
Balance, end of period 3,994 4,102    
Less: Reinsured MRB, end of period (57) (79)    
Net 3,937 4,023    
Combined        
Net amount at risk        
Net amount at risk 546 1,458    
GMDB only        
Net amount at risk        
Net amount at risk 739 1,280    
GMWB only        
Net amount at risk        
Net amount at risk 141 60    
Individual Retirement        
Market Risk Benefit [Roll Forward]        
Balance, beginning of year 4,562 3,738    
Effect of changes in our own credit risk (914) (564) (1,072) (441)
Balance, beginning of year, before effect of changes in our own credit risk 3,490 3,297    
Issuances 303 379    
Interest accrual 78 78    
Attributed fees 338 442    
Expected claims (34) (48)    
Effect of changes in interest rates (605) 34    
Effect of changes in interest rate volatility 22 (84)    
Effect of changes in equity markets (670) (843)    
Effect of changes in equity index volatility (37) 8    
Actual outcome different from model expected outcome (43) 93    
Effect of changes in other future expected assumptions (5) (94)    
Other, including foreign exchange 0 0    
Balance, end of period before effect of changes in our own credit risk 2,837 3,262    
Effect of changes in our own credit risk 914 564 1,072 441
Balance, end of period 3,751 3,826    
Less: Reinsured MRB, end of period (57) (79)    
Net $ 3,694 $ 3,747    
Net amount at risk        
Average attained age of contract holders 71 years 70 years    
Individual Retirement | Combined        
Net amount at risk        
Net amount at risk $ 533 $ 1,435    
Individual Retirement | GMDB only        
Net amount at risk        
Net amount at risk 609 1,068    
Individual Retirement | GMWB only        
Net amount at risk        
Net amount at risk 130 56    
Group Retirement        
Market Risk Benefit [Roll Forward]        
Balance, beginning of year 308 296    
Effect of changes in our own credit risk (73) (47) (88) (24)
Balance, beginning of year, before effect of changes in our own credit risk 220 272    
Issuances 24 19    
Interest accrual 6 8    
Attributed fees 30 33    
Expected claims (1) (1)    
Effect of changes in interest rates (48) 3    
Effect of changes in interest rate volatility 3 (4)    
Effect of changes in equity markets (62) (78)    
Effect of changes in equity index volatility (2) (4)    
Actual outcome different from model expected outcome 2 12    
Effect of changes in other future expected assumptions 0 (29)    
Other, including foreign exchange (2) (2)    
Balance, end of period before effect of changes in our own credit risk 170 229    
Effect of changes in our own credit risk 73 47 $ 88 $ 24
Balance, end of period 243 276    
Less: Reinsured MRB, end of period 0 0    
Net $ 243 $ 276    
Net amount at risk        
Average attained age of contract holders 64 years 64 years    
Group Retirement | Combined        
Net amount at risk        
Net amount at risk $ 13 $ 23    
Group Retirement | GMDB only        
Net amount at risk        
Net amount at risk 130 212    
Group Retirement | GMWB only        
Net amount at risk        
Net amount at risk $ 11 $ 4