v3.25.2
Investments - Schedule of Gross Unrealized Losses and Fair Value by Type and Length of Time Held in a Continuous Unrealized Loss Position (Details)
$ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2025
USD ($)
contract
Dec. 31, 2024
USD ($)
contract
Total unrealized losses    
Fixed income securities, at fair value $ 54,435 $ 52,747
Fixed income securities    
Less than 12 months    
Number of  issues | contract 1,125 2,204
Fair value $ 7,806 $ 22,824
Unrealized losses $ (186) $ (491)
12 months or more    
Number of  issues | contract 1,843 2,583
Fair value $ 7,378 $ 10,500
Unrealized losses (395) (739)
Total unrealized losses    
Total unrealized losses (581) (1,230)
Fixed income securities, at fair value 10 16
Fixed income securities, unrealized losses 1 1
Fixed income securities, credit loss allowance $ 1 $ 3
U.S. government and agencies    
Less than 12 months    
Number of  issues | contract 81 179
Fair value $ 1,179 $ 8,520
Unrealized losses $ (5) $ (256)
12 months or more    
Number of  issues | contract 56 99
Fair value $ 357 $ 801
Unrealized losses (9) (74)
Total unrealized losses    
Total unrealized losses (14) (330)
Fixed income securities, at fair value $ 15,712 $ 11,108
Municipal    
Less than 12 months    
Number of  issues | contract 571 990
Fair value $ 3,703 $ 4,889
Unrealized losses $ (123) $ (67)
12 months or more    
Number of  issues | contract 697 1,089
Fair value $ 1,176 $ 1,693
Unrealized losses (71) (109)
Total unrealized losses    
Total unrealized losses (194) (176)
Fixed income securities, at fair value $ 7,286 $ 8,842
Corporate    
Less than 12 months    
Number of  issues | contract 366 943
Fair value $ 2,456 $ 9,178
Unrealized losses $ (53) $ (166)
12 months or more    
Number of  issues | contract 948 1,237
Fair value $ 5,750 $ 7,877
Unrealized losses (304) (544)
Total unrealized losses    
Total unrealized losses (357) (710)
Fixed income securities, at fair value $ 27,962 $ 30,192
Foreign government    
Less than 12 months    
Number of  issues | contract 53 42
Fair value $ 298 $ 159
Unrealized losses $ (4) $ (2)
12 months or more    
Number of  issues | contract 62 73
Fair value $ 47 $ 73
Unrealized losses (8) (8)
Total unrealized losses    
Total unrealized losses (12) (10)
Fixed income securities, at fair value $ 1,391 $ 1,364
ABS    
Less than 12 months    
Number of  issues | contract 40 15
Fair value $ 164 $ 76
Unrealized losses $ (1) $ 0
12 months or more    
Number of  issues | contract 12 15
Fair value $ 44 $ 51
Unrealized losses (3) (4)
Total unrealized losses    
Total unrealized losses (4) (4)
Fixed income securities, at fair value $ 983 $ 1,145
MBS    
Less than 12 months    
Number of  issues | contract 14 35
Fair value $ 6 $ 2
Unrealized losses $ 0 $ 0
12 months or more    
Number of  issues | contract 68 70
Fair value $ 4 $ 5
Unrealized losses 0 0
Total unrealized losses    
Total unrealized losses 0 0
Fixed income securities, at fair value $ 1,101 $ 96
Investment grade fixed income securities    
Less than 12 months    
Number of  issues | contract 981 2,002
Fair value $ 7,362 $ 21,846
Unrealized losses $ (160) $ (473)
12 months or more    
Number of  issues | contract 1,665 2,367
Fair value $ 6,524 $ 9,281
Unrealized losses (350) (655)
Total unrealized losses    
Total unrealized losses $ (510) $ (1,128)
Below investment grade fixed income securities    
Less than 12 months    
Number of  issues | contract 144 202
Fair value $ 444 $ 978
Unrealized losses $ (26) $ (18)
12 months or more    
Number of  issues | contract 178 216
Fair value $ 854 $ 1,219
Unrealized losses (45) (84)
Total unrealized losses    
Total unrealized losses $ (71) $ (102)