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Investments (Continuous Gross Unrealized Losses for Fixed Maturity Securities Available-For-Sale) (Details) $ in Millions | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($)
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months, Estimated Fair Value | $ 59,813 | $ 26,345
Less than 12 months, Gross Unrealized Loss | $ 4,274 | $ 1,382
Total number of securities in an unrealized loss position less than 12 months | 7,220 | 2,922
Equal to or Greater than 12 Months, Estimated Fair Value | $ 119,976 | $ 152,089
Equal to or Greater than 12 Months ,Gross Unrealized Loss | $ 26,877 | $ 24,394
Total number of securities in an unrealized loss position equal or greater than 12 months | 10,468 | 13,049
U.S. corporate |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months, Estimated Fair Value | $ 17,222 | $ 4,722
Less than 12 months, Gross Unrealized Loss | 1,586 | 420
Equal to or Greater than 12 Months, Estimated Fair Value | 35,940 | 45,373
Equal to or Greater than 12 Months ,Gross Unrealized Loss | 6,599 | 6,208
Foreign corporate |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months, Estimated Fair Value | 10,516 | 3,210
Less than 12 months, Gross Unrealized Loss | 709 | 187
Equal to or Greater than 12 Months, Estimated Fair Value | 24,454 | 32,355
Equal to or Greater than 12 Months ,Gross Unrealized Loss | 5,625 | 5,240
Foreign government |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months, Estimated Fair Value | 6,462 | 3,913
Less than 12 months, Gross Unrealized Loss | 581 | 246
Equal to or Greater than 12 Months, Estimated Fair Value | 16,338 | 19,715
Equal to or Greater than 12 Months ,Gross Unrealized Loss | 4,740 | 4,187
RMBS |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months, Estimated Fair Value | 10,152 | 3,465
Less than 12 months, Gross Unrealized Loss | 358 | 60
Equal to or Greater than 12 Months, Estimated Fair Value | 13,922 | 17,128
Equal to or Greater than 12 Months ,Gross Unrealized Loss | 2,619 | 2,675
U.S. government and agency |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months, Estimated Fair Value | 9,337 | 7,856
Less than 12 months, Gross Unrealized Loss | 687 | 368
Equal to or Greater than 12 Months, Estimated Fair Value | 14,082 | 13,960
Equal to or Greater than 12 Months ,Gross Unrealized Loss | 5,027 | 3,344
ABS & CLO |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months, Estimated Fair Value | 2,840 | 1,662
Less than 12 months, Gross Unrealized Loss | 88 | 31
Equal to or Greater than 12 Months, Estimated Fair Value | 5,831 | 11,438
Equal to or Greater than 12 Months ,Gross Unrealized Loss | 436 | 629
Municipals |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months, Estimated Fair Value | 2,012 | 483
Less than 12 months, Gross Unrealized Loss | 226 | 34
Equal to or Greater than 12 Months, Estimated Fair Value | 4,621 | 5,449
Equal to or Greater than 12 Months ,Gross Unrealized Loss | 1,272 | 1,194
CMBS |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months, Estimated Fair Value | 1,272 | 1,034
Less than 12 months, Gross Unrealized Loss | 39 | 36
Equal to or Greater than 12 Months, Estimated Fair Value | 4,788 | 6,671
Equal to or Greater than 12 Months ,Gross Unrealized Loss | 559 | 917
Investment Grade |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months, Estimated Fair Value | 56,946 | 24,834
Less than 12 months, Gross Unrealized Loss | 4,132 | 1,287
Equal to or Greater than 12 Months, Estimated Fair Value | 116,072 | 146,138
Equal to or Greater than 12 Months ,Gross Unrealized Loss | 26,325 | 23,675
Below Investment Grade |  |
Debt Securities, Available-for-sale [Line Items] |  |
Less than 12 months, Estimated Fair Value | 2,867 | 1,511
Less than 12 months, Gross Unrealized Loss | 142 | 95
Equal to or Greater than 12 Months, Estimated Fair Value | 3,904 | 5,951
Equal to or Greater than 12 Months ,Gross Unrealized Loss | $ 552 | $ 719

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