v3.24.2
Investments - Aggregate Fair Value and Gross Unrealized Loss of Fixed Maturity Securities in an Unrealized Loss Position (Details)
$ in Millions
Jun. 30, 2024
USD ($)
security
Dec. 31, 2023
USD ($)
security
Debt Securities, Available-for-sale [Line Items]    
Number of securities, less than 12 months | security 2,052,000,000 1,032,000,000
Estimated fair value, less than 12 months $ 7,964 $ 2,699
Gross unrealized loss, less than 12 months $ (138) $ (55)
Number of securities, 12 months or greater | security 5,077,000,000 6,659,000,000
Estimated fair value, 12 months or greater $ 10,919 $ 14,842
Gross unrealized loss, 12 months or greater $ (1,123) $ (1,283)
United States Government securities    
Debt Securities, Available-for-sale [Line Items]    
Number of securities, less than 12 months | security 27,000,000 35,000,000
Estimated fair value, less than 12 months $ 914 $ 552
Gross unrealized loss, less than 12 months $ (28) $ (9)
Number of securities, 12 months or greater | security 38,000,000 44,000,000
Estimated fair value, 12 months or greater $ 503 $ 370
Gross unrealized loss, 12 months or greater $ (57) $ (45)
Government sponsored securities    
Debt Securities, Available-for-sale [Line Items]    
Number of securities, less than 12 months | security 5,000,000 0
Estimated fair value, less than 12 months $ 48 $ 0
Gross unrealized loss, less than 12 months $ (1) $ 0
Number of securities, 12 months or greater | security 37,000,000 40,000,000
Estimated fair value, 12 months or greater $ 46 $ 52
Gross unrealized loss, 12 months or greater $ (4) $ (3)
Foreign government securities    
Debt Securities, Available-for-sale [Line Items]    
Number of securities, less than 12 months | security 7,000,000 0
Estimated fair value, less than 12 months $ 61 $ 0
Gross unrealized loss, less than 12 months $ (1) $ 0
Number of securities, 12 months or greater | security 2,000,000 2,000,000
Estimated fair value, 12 months or greater $ 4 $ 4
Gross unrealized loss, 12 months or greater $ (1) $ (2)
States, municipalities and political subdivisions, tax-exempt    
Debt Securities, Available-for-sale [Line Items]    
Number of securities, less than 12 months | security 342,000,000 203,000,000
Estimated fair value, less than 12 months $ 742 $ 354
Gross unrealized loss, less than 12 months $ (11) $ (2)
Number of securities, 12 months or greater | security 869,000,000 1,034,000,000
Estimated fair value, 12 months or greater $ 1,469 $ 1,811
Gross unrealized loss, 12 months or greater $ (141) $ (150)
Corporate securities    
Debt Securities, Available-for-sale [Line Items]    
Number of securities, less than 12 months | security 1,184,000,000 389,000,000
Estimated fair value, less than 12 months $ 4,445 $ 608
Gross unrealized loss, less than 12 months $ (65) $ (15)
Number of securities, 12 months or greater | security 1,810,000,000 2,624,000,000
Estimated fair value, 12 months or greater $ 4,654 $ 6,871
Gross unrealized loss, 12 months or greater $ (461) $ (565)
Residential mortgage-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Number of securities, less than 12 months | security 256,000,000 183,000,000
Estimated fair value, less than 12 months $ 1,002 $ 438
Gross unrealized loss, less than 12 months $ (17) $ (5)
Number of securities, 12 months or greater | security 1,561,000,000 1,620,000,000
Estimated fair value, 12 months or greater $ 1,998 $ 2,075
Gross unrealized loss, 12 months or greater $ (287) $ (274)
Commercial mortgage-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Number of securities, less than 12 months | security 104,000,000 112,000,000
Estimated fair value, less than 12 months $ 415 $ 353
Gross unrealized loss, less than 12 months $ (7) $ (6)
Number of securities, 12 months or greater | security 405,000,000 534,000,000
Estimated fair value, 12 months or greater $ 1,071 $ 1,317
Gross unrealized loss, 12 months or greater $ (84) $ (132)
Other asset-backed securities    
Debt Securities, Available-for-sale [Line Items]    
Number of securities, less than 12 months | security 127,000,000 110,000,000
Estimated fair value, less than 12 months $ 337 $ 394
Gross unrealized loss, less than 12 months $ (8) $ (18)
Number of securities, 12 months or greater | security 355,000,000 761,000,000
Estimated fair value, 12 months or greater $ 1,174 $ 2,342
Gross unrealized loss, 12 months or greater $ (88) $ (112)