v3.26.3
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
9 Months Ended 12 Months Ended
Sep. 30, 2026
USD ($)
contract
Dec. 31, 2025
USD ($)
contract
Total unrealized losses    
Fixed income securities, at fair value $ 60,246 $ 59,115
Fixed income securities    
Less than 12 months    
Number of  issues | contract 4,323 874
Fair value $ 53,554 $ 17,417
Unrealized losses $ (2,353) $ (139)
12 months or more    
Number of  issues | contract 873 1,345
Fair value $ 2,539 $ 5,394
Unrealized losses (264) (253)
Total unrealized losses    
Total unrealized losses (2,617) (392)
Fixed income securities, at fair value 17 11
Fixed income securities, unrealized losses 1 2
Fixed income securities, credit loss allowance $ 1 $ 1
U.S. government and agencies    
Less than 12 months    
Number of  issues | contract 162 74
Fair value $ 11,210 $ 11,840
Unrealized losses $ (369) $ (72)
12 months or more    
Number of  issues | contract 20 54
Fair value $ 61 $ 209
Unrealized losses (3) (3)
Total unrealized losses    
Total unrealized losses (372) (75)
Fixed income securities, at fair value $ 11,329 $ 18,133
Municipal    
Less than 12 months    
Number of  issues | contract 929 106
Fair value $ 6,003 $ 640
Unrealized losses $ (357) $ (6)
12 months or more    
Number of  issues | contract 319 527
Fair value $ 571 $ 1,423
Unrealized losses (56) (55)
Total unrealized losses    
Total unrealized losses (413) (61)
Fixed income securities, at fair value $ 6,797 $ 5,643
Corporate    
Less than 12 months    
Number of  issues | contract 2,512 530
Fair value $ 31,785 $ 3,933
Unrealized losses $ (1,434) $ (49)
12 months or more    
Number of  issues | contract 401 640
Fair value $ 1,787 $ 3,677
Unrealized losses (189) (185)
Total unrealized losses    
Total unrealized losses (1,623) (234)
Fixed income securities, at fair value $ 36,374 $ 30,401
Foreign government    
Less than 12 months    
Number of  issues | contract 100 77
Fair value $ 1,316 $ 553
Unrealized losses $ (44) $ (9)
12 months or more    
Number of  issues | contract 63 53
Fair value $ 70 $ 40
Unrealized losses (15) (8)
Total unrealized losses    
Total unrealized losses (59) (17)
Fixed income securities, at fair value $ 1,666 $ 1,460
ABS    
Less than 12 months    
Number of  issues | contract 411 58
Fair value $ 1,302 $ 205
Unrealized losses $ (22) $ (2)
12 months or more    
Number of  issues | contract 12 12
Fair value $ 48 $ 42
Unrealized losses (1) (2)
Total unrealized losses    
Total unrealized losses (23) (4)
Fixed income securities, at fair value $ 2,058 $ 1,352
MBS    
Less than 12 months    
Number of  issues | contract 209 29
Fair value $ 1,938 $ 246
Unrealized losses $ (127) $ (1)
12 months or more    
Number of  issues | contract 58 59
Fair value $ 2 $ 3
Unrealized losses 0 0
Total unrealized losses    
Total unrealized losses (127) (1)
Fixed income securities, at fair value $ 2,022 $ 2,126
Investment grade fixed income securities    
Less than 12 months    
Number of  issues | contract 3,878 694
Fair value $ 50,293 $ 16,899
Unrealized losses $ (2,217) $ (123)
12 months or more    
Number of  issues | contract 768 1,212
Fair value $ 2,128 $ 4,793
Unrealized losses (226) (229)
Total unrealized losses    
Total unrealized losses $ (2,443) $ (352)
Below investment grade fixed income securities    
Less than 12 months    
Number of  issues | contract 445 180
Fair value $ 3,261 $ 518
Unrealized losses $ (136) $ (16)
12 months or more    
Number of  issues | contract 105 133
Fair value $ 411 $ 601
Unrealized losses (38) (24)
Total unrealized losses    
Total unrealized losses $ (174) $ (40)