v3.26.1
Reserves for Future Policy Benefits and Claims Payable - Schedule of Balances of and Changes in Liability for Future Policy Benefits, and Revenue and Interest Recognized (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Dec. 31, 2024
Payout Annuities      
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]      
Balance, beginning of period $ 0 $ 0  
Beginning of period cumulative effect of changes in discount rate assumptions 0 0  
Beginning balance at original discount rate 0 0  
Effect of changes in cash flow assumptions 0 0  
Effect of actual variances from expected experience 0 0  
Balance adjusted for variances from expectation 0 0  
Issuances 0 0  
Interest accrual 0 0  
Net premiums collected 0 0  
Ending balance at original discount rate 0 0  
End of period cumulative effect of changes in discount rate assumptions 0 0  
Balance, end of period 0 0  
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]      
Balance, beginning of period 1,169 1,095  
Beginning of period cumulative effect of changes in discount rate assumptions (58) (100)  
Beginning balance, including deferred profit liability 110 91  
Beginning balance at original discount rate (including DPL of $110, nil and $546 in March 31, 2026, and $91, nil and $588 in December 31, 2025 for payout annuities, closed block life and closed block annuity, respectively) 1,227 1,195  
Effect of changes in cash flow assumptions   0 $ (20)
Effect of actual variances from expected experience   1 (16)
Balance adjusted for variances from expectation   1,228 1,159
Issuances 30 171  
Interest accrual 12 47  
Benefits payments (43) (150)  
Ending balance, including deferred profit liability 106 110  
Ending balance of original discount rate (including DPL of $106, nil and $534 in March 31, 2026, and $110, nil and $546 in December 31, 2025 for payout annuities, closed block life and closed block annuity, respectively) 1,227 1,227  
End of period cumulative effect of changes in discount rate assumptions 71 58  
Balance, end of period 1,156 1,169  
Reserves for future policy benefits 1,156 1,169  
Less: Reinsurance recoverable 129 128  
Reserves for future policy benefits, after reinsurance recoverable 1,027 1,041  
Closed Block Life      
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]      
Balance, beginning of period 998 847  
Beginning of period cumulative effect of changes in discount rate assumptions 86 125  
Beginning balance at original discount rate 1,084 972  
Effect of changes in cash flow assumptions 0 232  
Effect of actual variances from expected experience (8) (33)  
Balance adjusted for variances from expectation 1,076 1,171  
Issuances 1 2  
Interest accrual 10 35  
Net premiums collected (32) (124)  
Ending balance at original discount rate 1,055 1,084  
End of period cumulative effect of changes in discount rate assumptions (97) (86)  
Balance, end of period 958 998  
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]      
Balance, beginning of period 4,578 4,425  
Beginning of period cumulative effect of changes in discount rate assumptions (671) (806)  
Beginning balance, including deferred profit liability 0 0  
Beginning balance at original discount rate (including DPL of $110, nil and $546 in March 31, 2026, and $91, nil and $588 in December 31, 2025 for payout annuities, closed block life and closed block annuity, respectively) 5,249 5,231  
Effect of changes in cash flow assumptions   0 414
Effect of actual variances from expected experience   6 (30)
Balance adjusted for variances from expectation   5,255 5,615
Issuances 3 8  
Interest accrual 39 150  
Benefits payments (154) (524)  
Ending balance, including deferred profit liability 0 0  
Ending balance of original discount rate (including DPL of $106, nil and $534 in March 31, 2026, and $110, nil and $546 in December 31, 2025 for payout annuities, closed block life and closed block annuity, respectively) 5,143 5,249  
End of period cumulative effect of changes in discount rate assumptions 721 671  
Balance, end of period 4,422 4,578  
Reserves for future policy benefits 3,464 3,580  
Less: Reinsurance recoverable 1,952 2,012  
Reserves for future policy benefits, after reinsurance recoverable 1,512 1,568  
Closed Block Annuity      
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]      
Balance, beginning of period 0 0  
Beginning of period cumulative effect of changes in discount rate assumptions 0 0  
Beginning balance at original discount rate 0 0  
Effect of changes in cash flow assumptions 0 0  
Effect of actual variances from expected experience 0 0  
Balance adjusted for variances from expectation 0 0  
Issuances 0 0  
Interest accrual 0 0  
Net premiums collected 0 0  
Ending balance at original discount rate 0 0  
End of period cumulative effect of changes in discount rate assumptions 0 0  
Balance, end of period 0 0  
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]      
Balance, beginning of period 3,647 3,837  
Beginning of period cumulative effect of changes in discount rate assumptions (157) (255)  
Beginning balance, including deferred profit liability 546 588  
Beginning balance at original discount rate (including DPL of $110, nil and $546 in March 31, 2026, and $91, nil and $588 in December 31, 2025 for payout annuities, closed block life and closed block annuity, respectively) 3,804 4,092  
Effect of changes in cash flow assumptions   0 (8)
Effect of actual variances from expected experience   2 6
Balance adjusted for variances from expectation   3,806 $ 4,090
Issuances 0 0  
Interest accrual 40 169  
Benefits payments (111) (455)  
Ending balance, including deferred profit liability 534 546  
Ending balance of original discount rate (including DPL of $106, nil and $534 in March 31, 2026, and $110, nil and $546 in December 31, 2025 for payout annuities, closed block life and closed block annuity, respectively) 3,735 3,804  
End of period cumulative effect of changes in discount rate assumptions 202 157  
Balance, end of period 3,533 3,647  
Reserves for future policy benefits 3,533 3,647  
Less: Reinsurance recoverable 4 4  
Reserves for future policy benefits, after reinsurance recoverable $ 3,529 $ 3,643