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Disposition of Joint-stock Company MetLife Insurance Company (Details) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Gain (Loss) on Sale of Business |  | $ 2,558 | $ 6,575 | $ 5,418
Joint-stock Company MetLife Insurance Company [Member] |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |
Gain (Loss) on Sale of Business | $ (133) |  |  |

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