v3.26.3
Future Policy Benefits (Details) (Narrative) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2025
Sep. 30, 2026
Dec. 31, 2025
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Liability for Future Policy Benefit, Adverse Development, Expense $ 117    
Life Insurance Product Line [Member]      
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Future Policy Benefit Expected Future Policy Benefit Annual Assumption Update     $ 183
Life Insurance Product Line [Member] | Americas [Member] | Other Segments      
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Changes In Cash Flow Assumptions 29 $ 4  
Liability for Future Policy Benefit, after Reinsurance 12,664 10,988  
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance (834) (775)  
Insurance, Other      
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Future Policy Benefit Expected Future Policy Benefit Annual Assumption Update   17 $ 24
Insurance, Other | Americas [Member] | Other Segments      
Liability for Future Policy Benefit, by Product Segment [Line Items]      
Changes In Cash Flow Assumptions 0 13  
Liability for Future Policy Benefit, after Reinsurance 8,090 5,986  
Liability for Future Policy Benefit, Reinsurance Recoverable, after Allowance $ (1,749) $ (4,706)