v3.26.3
Reserves for Future Policy Benefits and Claims Payable - Schedule of Assessments and Interest Expense, Closed Block Life (Details) - Closed Block Life - USD ($)
$ in Millions
9 Months Ended 12 Months Ended
Sep. 30, 2026
Dec. 31, 2025
Liability for Future Policy Benefit, Activity [Line Items]    
Assessments $ (80) $ (94)
Interest Expense $ 43 $ 58