v3.26.1
Investments - Schedule of Interest and Investment Income (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Schedule of Investments [Line Items]        
Gross investment income $ 881 $ 843 $ 1,777 $ 1,668
Investment expense (70) (66) (144) (131)
Interest and investment income 811 777 1,633 1,537
Fixed maturity securities, available-for-sale        
Schedule of Investments [Line Items]        
Gross investment income 562 572 1,144 1,141
Equity securities        
Schedule of Investments [Line Items]        
Gross investment income 6 7 13 15
Preferred equity securities        
Schedule of Investments [Line Items]        
Gross investment income 7 7 14 13
Mortgage loans        
Schedule of Investments [Line Items]        
Gross investment income 118 87 223 169
Invested cash and short-term investments        
Schedule of Investments [Line Items]        
Gross investment income 31 48 65 101
Limited partnerships        
Schedule of Investments [Line Items]        
Limited partnerships 83 60 185 115
Tax deferred property exchange income        
Schedule of Investments [Line Items]        
Gross investment income 29 29 58 58
Other investments        
Schedule of Investments [Line Items]        
Gross investment income $ 45 $ 33 $ 75 $ 56