v3.25.2
Reserves for Future Policy Benefits and Contract Owner Account Balances - Liability for Future Policy Benefits (Details)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2025
USD ($)
yr
Dec. 31, 2024
USD ($)
yr
Jun. 30, 2024
USD ($)
Dec. 31, 2023
USD ($)
Present Value of Expected Future Policy Benefits:        
Net liability for future policy benefits $ 9,215 $ 9,332    
Liability for Claims and Claims Adjustment Expense $ 561 $ 595 $ 521 $ 401
Current discount rate 4.30% 4.30%    
Employee Benefits Group        
Present Value of Expected Net Premiums:        
Balance at beginning of period $ 4 $ 68    
Beginning balance at original discount rate 4 71    
Reclassifications 0 (65)    
Effect of change in cash flow assumptions 0 (1)    
Effect of actual variances from expected experience 0 0    
Adjusted balance at January 1 4 5    
Interest accrual 0 0    
Net premiums collected 0 (1)    
Ending balance at original discount rate 4 4    
Effects of changes in discount rate assumptions 0 0    
Balance at end of period 4 4    
Present Value of Expected Future Policy Benefits:        
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change 772 899    
Beginning balance at original discount rate 801 918    
Reclassifications 0 (150)    
Effect of change in cash flow assumptions 0 (12)    
Effect of actual variances from expected experience (13) 10    
Adjusted balance at January 1 788 766    
Issuances 36 131    
Interest accrual 6 21    
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment (26) (117)    
Ending balance at original discount rate 804 801    
Effects of changes in discount rate assumptions (15) (29)    
Balance at end of period 789 772    
Net liability for future policy benefits 785 768    
Less: Reinsurance recoverable 342 330    
Net additional liability, after reinsurance recoverable 443 438    
Expected future benefit payments, Undiscounted 997 990    
Expected future gross premiums, Undiscounted 11 11    
Expected future benefit payments, Discounted 804 801   918
Expected future gross premiums, Discounted $ 8 $ 8    
Weighted average duration (in years) | yr 7 7    
Interest accretion rate 4.20% 4.00%    
Current discount rate 5.10% 5.40%    
Employee Benefits Voluntary        
Present Value of Expected Net Premiums:        
Balance at beginning of period $ 171 $ 101    
Beginning balance at original discount rate 180 102    
Reclassifications 0 65    
Effect of change in cash flow assumptions 0 (1)    
Effect of actual variances from expected experience 8 40    
Adjusted balance at January 1 188 206    
Interest accrual 2 8    
Net premiums collected (9) (34)    
Ending balance at original discount rate 181 180    
Effects of changes in discount rate assumptions (5) (9)    
Balance at end of period 176 171    
Present Value of Expected Future Policy Benefits:        
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change 461 307    
Beginning balance at original discount rate 487 307    
Reclassifications 0 150    
Effect of change in cash flow assumptions 0 (1)    
Effect of actual variances from expected experience 30 54    
Adjusted balance at January 1 517 510    
Issuances 0 0    
Interest accrual 5 18    
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment (11) (41)    
Ending balance at original discount rate 511 487    
Effects of changes in discount rate assumptions (23) (26)    
Balance at end of period 488 461    
Net liability for future policy benefits 312 290    
Less: Reinsurance recoverable 15 9    
Net additional liability, after reinsurance recoverable 297 281    
Expected future benefit payments, Undiscounted 907 881    
Expected future gross premiums, Undiscounted 644 631    
Expected future benefit payments, Discounted 511 487   307
Expected future gross premiums, Discounted $ 439 $ 427    
Weighted average duration (in years) | yr 14,000,000 14,000,000    
Interest accretion rate 5.00% 5.10%    
Current discount rate 5.70% 5.70%    
Businesses Exited        
Present Value of Expected Net Premiums:        
Balance at beginning of period $ 2,872 $ 3,145    
Beginning balance at original discount rate 2,842 2,992    
Reclassifications 0 0    
Effect of change in cash flow assumptions 0 110    
Effect of actual variances from expected experience (2) (106)    
Adjusted balance at January 1 2,840 2,996    
Interest accrual 78 158    
Net premiums collected (158) (312)    
Ending balance at original discount rate 2,760 2,842    
Effects of changes in discount rate assumptions 68 30    
Balance at end of period 2,828 2,872    
Present Value of Expected Future Policy Benefits:        
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change 7,017 7,538    
Beginning balance at original discount rate 7,138 7,404    
Reclassifications 0 0    
Effect of change in cash flow assumptions 0 187    
Effect of actual variances from expected experience (39) (90)    
Adjusted balance at January 1 7,099 7,501    
Issuances 6 14    
Interest accrual 180 370    
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment (349) (747)    
Ending balance at original discount rate 6,936 7,138    
Effects of changes in discount rate assumptions (11) (121)    
Balance at end of period 6,925 7,017    
Net liability for future policy benefits 4,097 4,145    
Less: Reinsurance recoverable 4,012 4,056    
Net additional liability, after reinsurance recoverable 85 89    
Expected future benefit payments, Discounted $ 6,936 $ 7,138   7,404
Weighted average duration (in years) | yr 8,000,000 8,000,000    
Interest accretion rate 5.00% 5.00%    
Current discount rate 5.40% 5.60%    
Businesses Exited - Additional liability        
Present Value of Expected Future Policy Benefits:        
Liability for Future Policy Benefit, Expected Future Policy Benefit, before Reinsurance, after Discount Rate Change $ 1,883 $ 2,001    
Effect of change in cash flow assumptions   0   (39)
Effect of actual variances from expected experience   (6)   14
Adjusted balance at January 1   1,877   $ 1,976
Interest accrual 39 83    
Liability for Future Policy Benefit, Expected Future Policy Benefit, Benefit Payment (210) (404)    
Assessments 146 228    
Balance at end of period   1,883    
Net liability for future policy benefits 1,852 1,883    
Less: Reinsurance recoverable 1,801 1,832    
Net additional liability, after reinsurance recoverable 51 51    
Businesses Exited - Other        
Present Value of Expected Future Policy Benefits:        
Net liability for future policy benefits 1,248 1,284    
Other        
Present Value of Expected Future Policy Benefits:        
Net liability for future policy benefits $ 360 $ 367