v3.26.1
Policyholder Account Balances, Future Policy Benefits and Claims - Additional Liabilities (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Additional Liability, Long-Duration Insurance [Roll Forward]    
Beginning balance $ 1,500 $ 1,389
Interest accrual 12 46
Benefit accrual 33 144
Benefit payments (26) (102)
Effect of actual variances from expected experience 2 12
Impact of change in net unrealized (gains) losses on securities (11) 11
Ending balance 1,510 1,500
Universal Life Insurance    
Additional Liability, Long-Duration Insurance [Roll Forward]    
Beginning balance 1,409 1,301
Interest accrual 11 40
Benefit accrual 31 132
Benefit payments (21) (84)
Effect of actual variances from expected experience 0 11
Impact of change in net unrealized (gains) losses on securities (9) 9
Ending balance $ 1,421 $ 1,409
Weighted average interest accretion rate 3.00% 2.90%
Weighted average discount rate 3.10% 3.10%
Weighted average duration of reserves (in years) 8 years 9 years
Variable Universal Life Insurance    
Additional Liability, Long-Duration Insurance [Roll Forward]    
Beginning balance $ 80 $ 80
Interest accrual 1 5
Benefit accrual 2 10
Benefit payments (3) (14)
Effect of actual variances from expected experience 1 (1)
Impact of change in net unrealized (gains) losses on securities 0 0
Ending balance $ 81 $ 80
Weighted average interest accretion rate 7.10% 6.80%
Weighted average discount rate 7.10% 7.10%
Weighted average duration of reserves (in years) 8 years 8 years
Other Life Insurance    
Additional Liability, Long-Duration Insurance [Roll Forward]    
Beginning balance $ 11 $ 8
Interest accrual 0 1
Benefit accrual 0 2
Benefit payments (2) (4)
Effect of actual variances from expected experience 1 2
Impact of change in net unrealized (gains) losses on securities (2) 2
Ending balance $ 8 $ 11
Weighted average interest accretion rate 3.90% 3.80%
Weighted average discount rate 3.90% 3.90%
Weighted average duration of reserves (in years) 7 years 7 years