v3.26.3
Fair Value - Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Assets and Liabilities Measured at Fair Value [Abstract]    
Fixed maturities available-for-sale $ 42,019 $ 43,351
Fixed maturities trading 282 633
Total fixed maturities 42,301 43,984
Equity securities 1,284 1,292
Short-term and other 5,542 5,871
Receivables 65  
Other liabilities (7)  
Payable to brokers (95) (43)
Corporate bonds and other    
Assets and Liabilities Measured at Fair Value [Abstract]    
Fixed maturities available-for-sale 25,039 26,250
States, municipalities and political subdivisions    
Assets and Liabilities Measured at Fair Value [Abstract]    
Fixed maturities available-for-sale 8,408 8,431
Asset-backed    
Assets and Liabilities Measured at Fair Value [Abstract]    
Fixed maturities available-for-sale 8,572 8,670
Fixed maturities available-for-sale    
Assets and Liabilities Measured at Fair Value [Abstract]    
Fixed maturities available-for-sale 42,019 43,351
Fixed maturities trading    
Assets and Liabilities Measured at Fair Value [Abstract]    
Fixed maturities trading 282 633
Level 1    
Assets and Liabilities Measured at Fair Value [Abstract]    
Total fixed maturities 564 841
Equity securities 725 762
Short-term and other 5,516 5,820
Receivables  
Other liabilities  
Payable to brokers (83) (43)
Level 1 | Corporate bonds and other    
Assets and Liabilities Measured at Fair Value [Abstract]    
Fixed maturities available-for-sale 282 238
Level 1 | States, municipalities and political subdivisions    
Assets and Liabilities Measured at Fair Value [Abstract]    
Fixed maturities available-for-sale
Level 1 | Asset-backed    
Assets and Liabilities Measured at Fair Value [Abstract]    
Fixed maturities available-for-sale
Level 1 | Fixed maturities available-for-sale    
Assets and Liabilities Measured at Fair Value [Abstract]    
Fixed maturities available-for-sale 282 238
Level 1 | Fixed maturities trading    
Assets and Liabilities Measured at Fair Value [Abstract]    
Fixed maturities trading 282 603
Level 2    
Assets and Liabilities Measured at Fair Value [Abstract]    
Total fixed maturities 39,210 40,617
Equity securities 528 497
Short-term and other 26 51
Receivables 65  
Other liabilities (7)  
Payable to brokers (12)
Level 2 | Corporate bonds and other    
Assets and Liabilities Measured at Fair Value [Abstract]    
Fixed maturities available-for-sale 23,197 24,529
Level 2 | States, municipalities and political subdivisions    
Assets and Liabilities Measured at Fair Value [Abstract]    
Fixed maturities available-for-sale 8,367 8,386
Level 2 | Asset-backed    
Assets and Liabilities Measured at Fair Value [Abstract]    
Fixed maturities available-for-sale 7,646 7,672
Level 2 | Fixed maturities available-for-sale    
Assets and Liabilities Measured at Fair Value [Abstract]    
Fixed maturities available-for-sale 39,210 40,587
Level 2 | Fixed maturities trading    
Assets and Liabilities Measured at Fair Value [Abstract]    
Fixed maturities trading 30
Level 3    
Assets and Liabilities Measured at Fair Value [Abstract]    
Total fixed maturities 2,527 2,526
Equity securities 31 33
Short-term and other
Receivables  
Other liabilities  
Payable to brokers
Level 3 | Corporate bonds and other    
Assets and Liabilities Measured at Fair Value [Abstract]    
Fixed maturities available-for-sale 1,560 1,483
Level 3 | States, municipalities and political subdivisions    
Assets and Liabilities Measured at Fair Value [Abstract]    
Fixed maturities available-for-sale 41 45
Level 3 | Asset-backed    
Assets and Liabilities Measured at Fair Value [Abstract]    
Fixed maturities available-for-sale 926 998
Level 3 | Fixed maturities available-for-sale    
Assets and Liabilities Measured at Fair Value [Abstract]    
Fixed maturities available-for-sale 2,527 2,526
Level 3 | Fixed maturities trading    
Assets and Liabilities Measured at Fair Value [Abstract]    
Fixed maturities trading