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v3.25.2

Investments (Schedule Of Amortized Cost and Fair Value of Available-for-Sale Securities) (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Mar. 31, 2025 | Dec. 31, 2024 | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | --- | --- | --- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |
Debt Securities, Available-for-sale, Amortized Cost | $ 118,947 |  | $ 115,083 |  |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss | (71) | $ (63) | (70) | $ (122) | $ (115) | $ (156)
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 1,743 |  | 1,119 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before tax | (4,500) |  | (5,769) |  |  |
Available for sale, Fair Value | 116,119 |  | 110,363 |  |  |
U.S. and local government securities |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |
Debt Securities, Available-for-sale, Amortized Cost | 4,271 |  | 4,383 |  |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss | 0 |  | 0 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 19 |  | 10 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before tax | (257) |  | (323) |  |  |
Available for sale, Fair Value | 4,033 |  | 4,070 |  |  |
Non-U.S. |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |
Debt Securities, Available-for-sale, Amortized Cost | 38,411 |  | 36,311 |  |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss | (20) |  | (23) |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 983 |  | 753 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before tax | (911) |  | (1,203) |  |  |
Available for sale, Fair Value | 38,463 |  | 35,838 |  |  |
Corporate and asset-backed securities |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |
Debt Securities, Available-for-sale, Amortized Cost | 46,411 |  | 45,231 |  |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss | (51) |  | (47) |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 568 |  | 287 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before tax | (1,802) |  | (2,264) |  |  |
Available for sale, Fair Value | 45,126 |  | 43,207 |  |  |
Mortgage-backed securities |  |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |  |
Debt Securities, Available-for-sale, Amortized Cost | 29,854 |  | 29,158 |  |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss | 0 |  | 0 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax | 173 |  | 69 |  |  |
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before tax | (1,530) |  | (1,979) |  |  |
Available for sale, Fair Value | $ 28,497 |  | $ 27,248 |  |  |

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