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Deferred Policy Acquisition Costs, Value of Business Acquired and Other Policy-Related Intangibles (DAC and VOBA by Segment) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Jan. 01, 2021
--- | --- | --- | --- | ---
Segment Reporting Information [Line Items] |  |  |  |
DAC and VOBA | $ 20,151 | $ 19,653 | $ 19,806 | $ 20,417
Group Benefits |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
DAC and VOBA | 258 | 264 |  |
Retirement and Income Solutions |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
DAC and VOBA | 413 | 286 |  |
Asia |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
DAC and VOBA | 11,983 | 11,560 |  |
Latin America |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
DAC and VOBA | 2,447 | 2,087 |  |
EMEA |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
DAC and VOBA | 1,731 | 1,607 |  |
MetLife Holdings |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
DAC and VOBA | 3,289 | 3,819 |  |
Corporate & Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
DAC and VOBA | $ 30 | $ 30 |  |

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- Definition Amount, after accumulated amortization, of deferred policy acquisition costs and present value of future profits from insurance contract acquired in business combination. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(7)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 + Details
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