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v3.25.2

Investments (Securities in a gross unrealized loss position) (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value, Less than 12 months | $ 6,927 | $ 9,019
Gross Unrealized Losses, Less than 12 Months | 243 | 267
Estimated Fair Value, 12 Months or Longer | 17,110 | 18,319
Gross Unrealized Losses, 12 Months or Longer | 2,496 | 2,773
Estimated Fair Value, Total | 24,037 | 27,338
Gross Unrealized Losses, Total | 2,739 | 3,040
Corporate and other bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value, Less than 12 months | 4,252 | 5,846
Gross Unrealized Losses, Less than 12 Months | 135 | 165
Estimated Fair Value, 12 Months or Longer | 9,515 | 10,388
Gross Unrealized Losses, 12 Months or Longer | 934 | 1,140
Estimated Fair Value, Total | 13,767 | 16,234
Gross Unrealized Losses, Total | 1,069 | 1,305
States, municipalities and political subdivisions |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value, Less than 12 months | 1,424 | 1,247
Gross Unrealized Losses, Less than 12 Months | 74 | 52
Estimated Fair Value, 12 Months or Longer | 2,938 | 2,967
Gross Unrealized Losses, 12 Months or Longer | 818 | 783
Estimated Fair Value, Total | 4,362 | 4,214
Gross Unrealized Losses, Total | 892 | 835
Residential mortgage-backed |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value, Less than 12 months | 372 | 849
Gross Unrealized Losses, Less than 12 Months | 9 | 22
Estimated Fair Value, 12 Months or Longer | 1,966 | 2,010
Gross Unrealized Losses, 12 Months or Longer | 418 | 466
Estimated Fair Value, Total | 2,338 | 2,859
Gross Unrealized Losses, Total | 427 | 488
Commercial mortgage-backed |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value, Less than 12 months | 99 | 230
Gross Unrealized Losses, Less than 12 Months | 1 | 3
Estimated Fair Value, 12 Months or Longer | 959 | 988
Gross Unrealized Losses, 12 Months or Longer | 106 | 139
Estimated Fair Value, Total | 1,058 | 1,218
Gross Unrealized Losses, Total | 107 | 142
Other asset-backed |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value, Less than 12 months | 580 | 680
Gross Unrealized Losses, Less than 12 Months | 18 | 21
Estimated Fair Value, 12 Months or Longer | 1,419 | 1,557
Gross Unrealized Losses, 12 Months or Longer | 195 | 218
Estimated Fair Value, Total | 1,999 | 2,237
Gross Unrealized Losses, Total | 213 | 239
Asset-backed |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value, Less than 12 months | 1,051 | 1,759
Gross Unrealized Losses, Less than 12 Months | 28 | 46
Estimated Fair Value, 12 Months or Longer | 4,344 | 4,555
Gross Unrealized Losses, 12 Months or Longer | 719 | 823
Estimated Fair Value, Total | 5,395 | 6,314
Gross Unrealized Losses, Total | 747 | 869
U.S. Treasury and obligations of government-sponsored enterprises |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value, Less than 12 months | 55 | 49
Gross Unrealized Losses, Less than 12 Months | 3 | 1
Estimated Fair Value, 12 Months or Longer | 19 | 41
Gross Unrealized Losses, 12 Months or Longer | 2 | 0
Estimated Fair Value, Total | 74 | 90
Gross Unrealized Losses, Total | 5 | 1
Foreign government |  |
Debt Securities, Available-for-sale [Line Items] |  |
Estimated Fair Value, Less than 12 months | 145 | 118
Gross Unrealized Losses, Less than 12 Months | 3 | 3
Estimated Fair Value, 12 Months or Longer | 294 | 368
Gross Unrealized Losses, 12 Months or Longer | 23 | 27
Estimated Fair Value, Total | 439 | 486
Gross Unrealized Losses, Total | $ 26 | $ 30

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