v3.26.1
Investments - Available-for-sale Securities in Gross Unrealized Loss Position (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Debt Securities, Available-for-sale [Line Items]    
Total, Estimated Fair Value $ 23,236 $ 20,644
Total, Gross Unrealized Losses 2,396 2,286
Total fixed maturity securities    
Debt Securities, Available-for-sale [Line Items]    
Less than 12 Months, Estimated Fair Value 8,075 3,998
Less than 12 Months, Gross Unrealized Losses 130 79
12 Months or Longer, Estimated Fair Value 15,161 16,646
12 Months or Longer, Gross Unrealized Losses 2,266 2,207
Total, Estimated Fair Value 23,236 20,644
Total, Gross Unrealized Losses 2,396 2,286
Corporate bonds and other    
Debt Securities, Available-for-sale [Line Items]    
Less than 12 Months, Estimated Fair Value 5,910 2,776
Less than 12 Months, Gross Unrealized Losses 96 56
12 Months or Longer, Estimated Fair Value 7,533 8,576
12 Months or Longer, Gross Unrealized Losses 868 825
Total, Estimated Fair Value 13,443 11,352
Total, Gross Unrealized Losses 964 881
States, municipalities and political subdivisions    
Debt Securities, Available-for-sale [Line Items]    
Less than 12 Months, Estimated Fair Value 373 403
Less than 12 Months, Gross Unrealized Losses 6 8
12 Months or Longer, Estimated Fair Value 3,428 3,471
12 Months or Longer, Gross Unrealized Losses 721 734
Total, Estimated Fair Value 3,801 3,874
Total, Gross Unrealized Losses 727 742
Residential mortgage-backed    
Debt Securities, Available-for-sale [Line Items]    
Less than 12 Months, Estimated Fair Value 601 154
Less than 12 Months, Gross Unrealized Losses 10 1
12 Months or Longer, Estimated Fair Value 1,837 2,002
12 Months or Longer, Gross Unrealized Losses 375 365
Total, Estimated Fair Value 2,438 2,156
Total, Gross Unrealized Losses 385 366
Commercial mortgage-backed    
Debt Securities, Available-for-sale [Line Items]    
Less than 12 Months, Estimated Fair Value 167 36
Less than 12 Months, Gross Unrealized Losses 3 2
12 Months or Longer, Estimated Fair Value 785 887
12 Months or Longer, Gross Unrealized Losses 76 78
Total, Estimated Fair Value 952 923
Total, Gross Unrealized Losses 79 80
Other asset-backed    
Debt Securities, Available-for-sale [Line Items]    
Less than 12 Months, Estimated Fair Value 647 420
Less than 12 Months, Gross Unrealized Losses 10 9
12 Months or Longer, Estimated Fair Value 1,341 1,432
12 Months or Longer, Gross Unrealized Losses 207 185
Total, Estimated Fair Value 1,988 1,852
Total, Gross Unrealized Losses 217 194
Total asset-backed    
Debt Securities, Available-for-sale [Line Items]    
Less than 12 Months, Estimated Fair Value 1,415 610
Less than 12 Months, Gross Unrealized Losses 23 12
12 Months or Longer, Estimated Fair Value 3,963 4,321
12 Months or Longer, Gross Unrealized Losses 658 628
Total, Estimated Fair Value 5,378 4,931
Total, Gross Unrealized Losses 681 640
U.S. Treasury and obligations of government-sponsored enterprises    
Debt Securities, Available-for-sale [Line Items]    
Less than 12 Months, Estimated Fair Value 167 78
Less than 12 Months, Gross Unrealized Losses 2 2
12 Months or Longer, Estimated Fair Value 14 18
12 Months or Longer, Gross Unrealized Losses 1 1
Total, Estimated Fair Value 181 96
Total, Gross Unrealized Losses 3 3
Foreign government    
Debt Securities, Available-for-sale [Line Items]    
Less than 12 Months, Estimated Fair Value 210 131
Less than 12 Months, Gross Unrealized Losses 3 1
12 Months or Longer, Estimated Fair Value 223 260
12 Months or Longer, Gross Unrealized Losses 18 19
Total, Estimated Fair Value 433 391
Total, Gross Unrealized Losses $ 21 $ 20