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Investments (Net Investment Income) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Net Investment Income [Line Items] |  |  |  |
Less: Investment expenses | $ 527 | $ 564 | $ 1,053 | $ 1,132
Net investment income | 5,661 | 5,205 | 10,546 | 10,641
Securities Investment |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Gross Investment Income, Operating | 5,690 | 5,550 | 11,328 | 11,012
Net investment income | 5,163 | 4,986 | 10,275 | 9,880
Fixed maturity securities AFS |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Gross Investment Income, Operating | 3,608 | 3,355 | 7,075 | 6,643
Equity Securities |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Gross Investment Income, Operating | 3 | 7 | 12 | 14
FVO securities |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Gross Investment Income, Operating | 107 | 22 | 87 | 107
Mortgage loans |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Gross Investment Income, Operating | 1,104 | 1,187 | 2,243 | 2,381
Policy loans |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Gross Investment Income, Operating | 113 | 110 | 220 | 223
Real Estate and Real Estate Joint Ventures |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Gross Investment Income, Operating | 239 | 80 | 446 | 90
OLPI |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Gross Investment Income, Operating | 124 | 325 | 344 | 626
Cash, cash equivalents and short-term investments |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Gross Investment Income, Operating | 254 | 250 | 504 | 541
Operating joint ventures |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Gross Investment Income, Operating | 38 | 22 | 58 | 44
Other Investments |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Gross Investment Income, Operating | 100 | 192 | 339 | 343
Unit-linked investments |  |  |  |
Net Investment Income [Line Items] |  |  |  |
Net investment income | $ 498 | $ 219 | $ 271 | $ 761

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