v3.26.1
Policyholder Account Balances, Future Policy Benefits and Claims - Amounts Recognized in Statement of Operations (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Liability for Future Policy Benefit, Activity [Line Items]    
Gross Premiums $ 142 $ 616
Interest Expense 95 385
Life Contingent Payout Annuities    
Liability for Future Policy Benefit, Activity [Line Items]    
Gross Premiums 32 157
Interest Expense 14 56
Term and Whole Life Insurance    
Liability for Future Policy Benefit, Activity [Line Items]    
Gross Premiums 43 174
Interest Expense 8 35
Disability Income Insurance    
Liability for Future Policy Benefit, Activity [Line Items]    
Gross Premiums 27 114
Interest Expense 7 28
Long Term Care Insurance    
Liability for Future Policy Benefit, Activity [Line Items]    
Gross Premiums 40 171
Interest Expense $ 66 $ 266