v3.25.2
Investments - Gross Unrealized Loss by Length of Time (Details)
$ in Millions
Jun. 30, 2025
USD ($)
security
Dec. 31, 2024
USD ($)
security
Less than 12 months    
Fair Value $ 763 $ 1,975
Gross Unrealized Loss $ (16) $ (40)
Number of securities | security 275 569
12 months or more    
Fair Value $ 1,933 $ 2,417
Gross Unrealized Loss $ (210) $ (277)
Number of securities | security 906 1,065
Total    
Fair Value $ 2,696 $ 4,392
Gross Unrealized Loss $ (226) $ (317)
Number of securities | security 1,165 1,591
Obligations of state and political subdivisions    
Less than 12 months    
Fair Value $ 288 $ 624
Gross Unrealized Loss (5) (7)
12 months or more    
Fair Value 833 964
Gross Unrealized Loss (89) (96)
Total    
Fair Value 1,121 1,588
Gross Unrealized Loss (94) (103)
U.S. government and agencies    
Less than 12 months    
Fair Value 2 5
Gross Unrealized Loss 0 0
12 months or more    
Fair Value 12 28
Gross Unrealized Loss (5) (6)
Total    
Fair Value 14 33
Gross Unrealized Loss (5) (6)
Corporate securities    
Less than 12 months    
Fair Value 225 762
Gross Unrealized Loss (3) (20)
12 months or more    
Fair Value 849 1,046
Gross Unrealized Loss (100) (150)
Total    
Fair Value 1,074 1,808
Gross Unrealized Loss (103) (170)
RMBS    
Less than 12 months    
Fair Value 82 255
Gross Unrealized Loss (1) (4)
12 months or more    
Fair Value 115 123
Gross Unrealized Loss (7) (10)
Total    
Fair Value 197 378
Gross Unrealized Loss (8) (14)
CMBS    
Less than 12 months    
Fair Value 0 83
Gross Unrealized Loss 0 0
12 months or more    
Fair Value 65 103
Gross Unrealized Loss (1) (3)
Total    
Fair Value 65 186
Gross Unrealized Loss (1) (3)
CLOs    
Less than 12 months    
Fair Value 87 151
Gross Unrealized Loss (6) (5)
12 months or more    
Fair Value 29 107
Gross Unrealized Loss 0 (1)
Total    
Fair Value 116 258
Gross Unrealized Loss (6) (6)
Others    
Less than 12 months    
Fair Value 79 60
Gross Unrealized Loss (1) (1)
12 months or more    
Fair Value 10 16
Gross Unrealized Loss 0 0
Total    
Fair Value 89 76
Gross Unrealized Loss (1) (1)
Non-U.S. government securities    
Less than 12 months    
Fair Value 0 35
Gross Unrealized Loss 0 (3)
12 months or more    
Fair Value 20 30
Gross Unrealized Loss (8) (11)
Total    
Fair Value 20 65
Gross Unrealized Loss $ (8) $ (14)