v3.26.1
Reserves for Future Policy Benefits and Contract Owner Account Balances - Liability for Future Policy Benefits (Details)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2026
USD ($)
yr
Dec. 31, 2025
USD ($)
yr
Mar. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Present Value of Expected Future Policy Benefits:        
Net liability for future policy benefits $ 8,790 $ 8,982    
Liability for Claims and Claims Adjustment Expense $ 405 $ 458 $ 476 $ 595
Current discount rate 4.20% 4.30%    
Employee Benefits Group        
Present Value of Expected Net Premiums:        
Balance at beginning of period $ 4 $ 4    
Beginning balance at original discount rate 4 4    
Effect of change in cash flow assumptions 0 0    
Effect of actual variances from expected experience 0 0    
Adjusted balance at January 1 4 4    
Interest accrual 0 0    
Net premiums collected 0 0    
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:        
Balance at beginning of period 792 772    
Beginning balance at original discount rate 802 801    
Effect of change in cash flow assumptions 0 (5)    
Effect of actual variances from expected experience (15) (30)    
Adjusted balance at January 1 787 766    
Issuances 38 102    
Interest accrual 6 17    
Benefit payments (31) (83)    
Ending balance at original discount rate 800 802    
Effects of changes in discount rate assumptions (19) (10)    
Balance at end of period 781 792    
Net liability for future policy benefits 777 788    
Less: Reinsurance recoverable 357 353    
Net additional liability, after reinsurance recoverable 420 435    
Expected future benefit payments, Undiscounted 1,003 1,005    
Expected future gross premiums, Undiscounted 10 11    
Expected future benefit payments, Discounted 800 802   801
Expected future gross premiums, Discounted $ 8 $ 8    
Weighted average duration (in years) | yr 7 7    
Interest accretion rate 4.30% 4.20%    
Current discount rate 5.20% 5.00%    
Employee Benefits Voluntary        
Present Value of Expected Net Premiums:        
Balance at beginning of period $ 166 $ 171    
Beginning balance at original discount rate 169 180    
Effect of change in cash flow assumptions 0 (11)    
Effect of actual variances from expected experience 9 20    
Adjusted balance at January 1 178 189    
Interest accrual 2 6    
Net premiums collected (9) (26)    
Ending balance at original discount rate 171 169    
Effects of changes in discount rate assumptions (5) (3)    
Balance at end of period 166 166    
Present Value of Expected Future Policy Benefits:        
Balance at beginning of period 498 461    
Beginning balance at original discount rate 517 487    
Effect of change in cash flow assumptions 0 (12)    
Effect of actual variances from expected experience 9 60    
Adjusted balance at January 1 526 535    
Issuances 0 0    
Interest accrual 5 14    
Benefit payments (10) (32)    
Ending balance at original discount rate 521 517    
Effects of changes in discount rate assumptions (26) (19)    
Balance at end of period 495 498    
Net liability for future policy benefits 329 332    
Less: Reinsurance recoverable 17 16    
Net additional liability, after reinsurance recoverable 312 316    
Expected future benefit payments, Undiscounted 915 910    
Expected future gross premiums, Undiscounted 584 566    
Expected future benefit payments, Discounted 521 517   487
Expected future gross premiums, Discounted $ 412 $ 398    
Weighted average duration (in years) | yr 14,000,000 14,000,000    
Interest accretion rate 5.00% 5.10%    
Current discount rate 5.90% 5.70%    
Businesses Exited        
Present Value of Expected Net Premiums:        
Balance at beginning of period $ 2,557 $ 2,872    
Beginning balance at original discount rate 2,479 2,842    
Effect of change in cash flow assumptions 0 (194)    
Effect of actual variances from expected experience 12 (17)    
Adjusted balance at January 1 2,491 2,631    
Interest accrual 34 148    
Net premiums collected (71) (300)    
Ending balance at original discount rate 2,454 2,479    
Effects of changes in discount rate assumptions 37 78    
Balance at end of period 2,491 2,557    
Present Value of Expected Future Policy Benefits:        
Balance at beginning of period 6,527 7,017    
Beginning balance at original discount rate 6,494 7,138    
Effect of change in cash flow assumptions 0 (244)    
Effect of actual variances from expected experience 16 (57)    
Adjusted balance at January 1 6,510 6,837    
Issuances 2 13    
Interest accrual 83 351    
Benefit payments (174) (707)    
Ending balance at original discount rate 6,421 6,494    
Effects of changes in discount rate assumptions (63) 33    
Balance at end of period 6,358 6,527    
Net liability for future policy benefits 3,867 3,970    
Less: Reinsurance recoverable 3,781 3,883    
Net additional liability, after reinsurance recoverable 86 87    
Expected future benefit payments, Discounted $ 6,421 $ 6,494   7,138
Weighted average duration (in years) | yr 7,000,000 8,000,000    
Interest accretion rate 5.10% 5.00%    
Current discount rate 5.50% 5.30%    
Businesses Exited - Additional liability        
Present Value of Expected Future Policy Benefits:        
Balance at beginning of period $ 1,880 $ 1,883    
Effect of change in cash flow assumptions   0   59
Effect of actual variances from expected experience   5   (11)
Adjusted balance at January 1   1,885   $ 1,931
Interest accrual 19 80    
Benefit payments (105) (406)    
Assessments 66 275    
Balance at end of period   1,880    
Net liability for future policy benefits 1,865 1,880    
Less: Reinsurance recoverable 1,813 1,827    
Net additional liability, after reinsurance recoverable 52 53    
Businesses Exited - Other        
Present Value of Expected Future Policy Benefits:        
Net liability for future policy benefits 1,228 1,236    
Other        
Present Value of Expected Future Policy Benefits:        
Net liability for future policy benefits $ 319 $ 318