v3.26.3
Market Risk Benefits (Balances and Changes of Market Risk Benefits) (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Dec. 31, 2024
Market Risk Benefit [Line Items]        
Market Risk Benefit, after Increase (Decrease) from Instrument-Specific Credit Risk $ 183 $ 219    
Market Risk Benefit, Net Amount at Risk 204   $ 234  
Insurance, Other | Americas [Member] | Other Segments        
Market Risk Benefit [Line Items]        
Market Risk Benefit, after Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change 183 219 215 $ 206
Market Risk Benefit, before Reinsurance and Cumulative Increase (Decrease) from Instrument-Specific Credit Risk Change 186 220 $ 217 $ 209
Market Risk Benefit, Interest Expense 4 6    
Market Risk Benefit, Attributed Fee Collected 17 18    
Market Risk Benefit, Increase (Decrease) from Interest Rate Change (48) 9    
Market Risk Benefit, Increase (Decrease) from Equity Market Change (16) (32)    
Market Risk Benefit, Increase (Decrease) from Volatility 2 1    
Market Risk Benefit, Increase (Decrease) from Other Assumption 8 (7)    
Market Risk Benefit, Increase (Decrease) from Actual Policyholder Behavior Different from Expected 5 16    
AOCI, Market Risk Benefit, Instrument-Specific Credit Risk, before Tax (3) (1)    
Market Risk Benefit, after Increase (Decrease) from Instrument-Specific Credit Risk 183 219    
Market Risk Benefit, Reinsurance Recoverable, after Allowance 0 0    
Market Risk Benefit, Net Amount at Risk $ 1,136 $ 1,218    
Net Amount at Risk by Product and Guarantee, Weighted Average Attained Age 73 years 72 years    
Market Risk Benefit, Increase (Decrease) from Future Expected Policyholder Behavior Assumption $ (3) $ 0