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Income Tax (Reconciliation of Income Tax Provision between US Statutory Rate and As Reported for Continuing Operations) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2021 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Income tax expense benefit continuing operations income tax reconciliation |  |  |  |
Tax provision at U.S. statutory rate |  | $ 601 | $ 1,706 | $ 1,455
Dividend received deduction |  | (20) | (40) | (34)
Tax-exempt income |  | 15 | (36) | (45)
Prior year tax (1), (2) |  | (15) | (127) | (27)
Low income housing tax credits |  | (143) | (178) | (202)
Other tax credits |  | (44) | (46) | (45)
Foreign tax rate differential (3), (4), (5) |  | (110) | 267 | 414
Change in valuation allowance |  | 0 | 1 | (5)
Other, net |  | (17) | (4) | 2
Deferred Federal Income Tax Expense (Benefit) |  | 536 | 837 | (115)
Provision for income tax expense (benefit) |  | 301 | 1,551 | 1,509
MetLife Seguros de Retiro [Member] |  |  |  |
Income tax expense benefit continuing operations income tax reconciliation |  |  |  |
Foreign tax rate differential (3), (4), (5) |  |  |  | 60
MetLife Russia [Member] |  |  |  |
Income tax expense benefit continuing operations income tax reconciliation |  |  |  |
Foreign tax rate differential (3), (4), (5) |  |  |  | 24
MetLife Poland and Greece |  |  |  |
Income tax expense benefit continuing operations income tax reconciliation |  |  |  |
Foreign tax rate differential (3), (4), (5) |  |  | 50 |
MetLife Seguros S.A |  |  |  |
Income tax expense benefit continuing operations income tax reconciliation |  |  |  |
Foreign tax rate differential (3), (4), (5) |  |  | 41 |
Settlement with Taxing Authority |  |  |  |
Income tax expense benefit continuing operations income tax reconciliation |  |  |  |
Prior year tax (1), (2) |  | (32) | (117) | (40)
Provision for income tax expense (benefit) | $ (53) |  |  |
GILTI [Member] |  |  |  |
Income tax expense benefit continuing operations income tax reconciliation |  |  |  |
Foreign tax rate differential (3), (4), (5) |  | 12 | 30 | $ 43
GILTI [Member] | Tax Year 2020 |  |  |  |
Income tax expense benefit continuing operations income tax reconciliation |  |  |  |
Foreign tax rate differential (3), (4), (5) |  |  | (12) |
GILTI [Member] | Tax Year 2021 |  |  |  |
Income tax expense benefit continuing operations income tax reconciliation |  |  |  |
Foreign tax rate differential (3), (4), (5) |  | (21) | $ 42 |
GILTI [Member] | Tax Year 2022 |  |  |  |
Income tax expense benefit continuing operations income tax reconciliation |  |  |  |
Foreign tax rate differential (3), (4), (5) |  | $ 33 |  |

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- Definition Amount of deferred federal tax expense (benefit) attributable to income (loss) from continuing operations. Includes, but is not limited to, deferred national tax expense (benefit) for non-US (United States of America) jurisdiction. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.7) -URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(1)(Note 1)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32639-109319 + Details
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