v3.24.2.u1
Future Policy Benefits - Schedule of liabilities by product (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Dec. 31, 2022
Liability for Future Policy Benefit, Activity [Line Items]        
Net liability for future policy benefits, beginning balance $ 57,108      
Effect of actual variances from expected experience     $ (18) $ 16
Adjusted beginning of year balance     15,147 14,599
Interest accrual 224 $ 237    
Other (4) 10    
Net liability for future policy benefits, end of period 56,355 54,288    
Less: Reinsurance recoverable: (21,535) (23,011)    
Net liability for future policy benefits after reinsurance recoverable 34,820 31,277    
Universal Life        
Liability for Future Policy Benefit, Activity [Line Items]        
Net liability for future policy benefits, beginning balance 3,786 3,355    
Effect of actual variances from expected experience     190 148
Adjusted beginning of year balance     3,976 3,503
Assessments 289 342    
Excess benefits paid (413) (457)    
Interest accrual 79 62    
Other 0 (3)    
Changes related to unrealized appreciation (depreciation) of investments 40 11    
Net liability for future policy benefits, end of period 3,971 3,458    
Less: Reinsurance recoverable: (230) (172)    
Net liability for future policy benefits after reinsurance recoverable 3,741 3,286    
Life Insurance        
Liability for Future Policy Benefit, Activity [Line Items]        
Effect of actual variances from expected experience     (12) 10
Adjusted beginning of year balance     14,136 13,536
Interest accrual 202 214    
Other (4) 10    
Net liability for future policy benefits, end of period 13,128 13,593    
Less: Reinsurance recoverable: (699) (1,148)    
Net liability for future policy benefits after reinsurance recoverable $ 12,429 $ 12,445    
Weighted average liability duration of the liability for future policy benefits (in years) 10 years 10 months 24 days 12 years 6 months    
Life Insurance | Universal Life        
Liability for Future Policy Benefit, Activity [Line Items]        
Net liability for future policy benefits, beginning balance $ 3,731 $ 3,300    
Effect of actual variances from expected experience     192 149
Adjusted beginning of year balance     3,923 3,449
Assessments 288 341    
Excess benefits paid (413) (457)    
Interest accrual 78 61    
Other 0 (3)    
Changes related to unrealized appreciation (depreciation) of investments 40 11    
Net liability for future policy benefits, end of period 3,916 3,402    
Less: Reinsurance recoverable: (175) (172)    
Net liability for future policy benefits after reinsurance recoverable $ 3,741 $ 3,230    
Weighted average liability duration of the liability for future policy benefits (in years) 25 years 1 month 6 days 26 years 2 months 12 days    
Corporate and Other        
Liability for Future Policy Benefit, Activity [Line Items]        
Effect of actual variances from expected experience     (6) 6
Adjusted beginning of year balance     1,011 1,063
Interest accrual $ 22 $ 23    
Other 0 0    
Net liability for future policy benefits, end of period 20,793 21,820    
Less: Reinsurance recoverable: (20,793) (21,820)    
Net liability for future policy benefits after reinsurance recoverable $ 0 $ 0    
Weighted average liability duration of the liability for future policy benefits (in years) 10 years 10 months 24 days 11 years 6 months    
Corporate and Other | Universal Life        
Liability for Future Policy Benefit, Activity [Line Items]        
Net liability for future policy benefits, beginning balance $ 55 $ 55    
Effect of actual variances from expected experience     (2) (1)
Adjusted beginning of year balance     $ 53 $ 54
Assessments 1 1    
Excess benefits paid 0 0    
Interest accrual 1 1    
Other 0 0    
Changes related to unrealized appreciation (depreciation) of investments 0 0    
Net liability for future policy benefits, end of period 55 56    
Less: Reinsurance recoverable: (55) 0    
Net liability for future policy benefits after reinsurance recoverable $ 0 $ 56    
Weighted average liability duration of the liability for future policy benefits (in years) 9 years 9 years 2 months 12 days