v3.26.1
Investments - Schedule of Interest and Investment Income (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Schedule of Investments [Line Items]    
Gross investment income $ 895 $ 824
Investment expense (73) (64)
Interest and investment income 822 760
Fixed maturity securities, available-for-sale    
Schedule of Investments [Line Items]    
Gross investment income 582 569
Equity securities    
Schedule of Investments [Line Items]    
Gross investment income 7 8
Preferred equity securities    
Schedule of Investments [Line Items]    
Gross investment income 6 6
Mortgage loans    
Schedule of Investments [Line Items]    
Gross investment income 105 82
Invested cash and short-term investments    
Schedule of Investments [Line Items]    
Gross investment income 34 53
Limited partnerships    
Schedule of Investments [Line Items]    
Limited partnerships 101 55
Tax deferred property exchange income    
Schedule of Investments [Line Items]    
Gross investment income 30 29
Other investments    
Schedule of Investments [Line Items]    
Gross investment income $ 30 $ 22