v3.25.1
Investments - Investment Gains (Losses) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Investment Gains (Losses) [Abstract]    
Investment gains (losses) recognized due to the change in fair value of non-redeemable preferred stock included within equity securities held $ (9) $ (22)
Nonredeemable Preferred Stock    
Investment Gains (Losses) [Abstract]    
Investment gains (losses) recognized due to the change in fair value of non-redeemable preferred stock included within equity securities held (2) 11
Fixed maturity securities    
Investment Gains (Losses) [Abstract]    
Gross gains 13 14
Gross losses (22) (46)
Investment gains (losses) recognized due to the change in fair value of non-redeemable preferred stock included within equity securities held (9) (32)
Equity securities    
Investment Gains (Losses) [Abstract]    
Investment gains (losses) recognized due to the change in fair value of non-redeemable preferred stock included within equity securities held 11
Short-term investments and other    
Investment Gains (Losses) [Abstract]    
Investment gains (losses) recognized due to the change in fair value of non-redeemable preferred stock included within equity securities held $ (1)