v3.26.1
Future Policy Benefits - Additional Information (Details) - USD ($)
$ in Millions
 6 Months Ended 12 Months Ended
Jun. 30, 2026
Dec. 31, 2025
Long-term care insurance    
Liability for Future Policy Benefit, Activity [Line Items]    
Liability for future policy benefit cumulative increase (decrease) from cash flow change $ (11) $ 286
Liability for future policy benefit cumulative increase (decrease) of actual variance from expected experience 162 368
Net insurance recoveries 23  
Gain on reinsurance recapture   26
Life insurance    
Liability for Future Policy Benefit, Activity [Line Items]    
Liability for future policy benefit cumulative increase (decrease) of actual variance from expected experience 41 32
Liability for future policy benefit adverse development expenses $ 1  
Net premium ratio capped (as percent) 100.00%  
Fixed annuities    
Liability for Future Policy Benefit, Activity [Line Items]    
Liability for future policy benefit cumulative increase (decrease) of actual variance from expected experience $ (13) $ (66)