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Investments (Net Investment Income) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Net Investment Income [Line Items] |  |  |
Less: Investment expenses | $ 1,284 | $ 949 | $ 1,054
Net investment income | 15,916 | 21,395 | 17,117
Securities Investment |  |  |
Net Investment Income [Line Items] |  |  |
Gross Investment Income, Operating | 18,498 | 21,392 | 17,603
Net investment income | 17,214 | 20,443 | 16,549
Fixed maturity securities AFS |  |  |
Net Investment Income [Line Items] |  |  |
Gross Investment Income, Operating | 11,490 | 10,996 | 11,304
Equity Securities |  |  |
Net Investment Income [Line Items] |  |  |
Gross Investment Income, Operating | 36 | 36 | 50
FVO Securities |  |  |
Net Investment Income [Line Items] |  |  |
Net investment income | (127) | 167 | 140
Mortgage loans |  |  |
Net Investment Income [Line Items] |  |  |
Gross Investment Income, Operating | 3,539 | 3,435 | 3,518
Policy loans |  |  |
Net Investment Income [Line Items] |  |  |
Gross Investment Income, Operating | 460 | 474 | 498
Real Estate and Real Estate Joint Ventures |  |  |
Net Investment Income [Line Items] |  |  |
Gross Investment Income, Operating | 1,200 | 954 | 532
Other limited partnership interests |  |  |
Net Investment Income [Line Items] |  |  |
Gross Investment Income, Operating | 858 | 4,927 | 1,000
Cash, cash equivalents and short-term investments |  |  |
Net Investment Income [Line Items] |  |  |
Gross Investment Income, Operating | 358 | 103 | 213
Operating joint ventures |  |  |
Net Investment Income [Line Items] |  |  |
Gross Investment Income, Operating | 51 | 77 | 93
Other Investments |  |  |
Net Investment Income [Line Items] |  |  |
Gross Investment Income, Operating | 633 | 223 | 255
Unit-linked investments |  |  |
Net Investment Income [Line Items] |  |  |
Net investment income | $ (1,298) | $ 952 | $ 568

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- Definition Amount, before investment expense, of income earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04.2) -URI https://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 + Details
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