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Condensed Financial Information (Parent Company) (Support Agreements - Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021
Condensed Financial Statements, Captions [Line Items] |  |
Derivative Liability, Fair Value, Amount Offset Against Collateral | $ 25 | $ 121
Parent Company | Support Agreement Exeter Obligations [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Amount guaranteed under support agreement | $ 1,000 |
Parent Company | Support Agreement MetLife Reinsurance Company of Vermont [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Guaranteed adjusted capital levels | 200 |
Parent Company | Support Agreement MetLife Reinsurance Company of Charleston [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Guaranteed adjusted capital levels | 200 |
Parent Company | Support Agreement - Guarantees of Subsidiary Derivative Obligations [Member] |  |
Condensed Financial Statements, Captions [Line Items] |  |
Derivative Assets, Fair Value, Net | $ 174 | 255
Unsecured derivative liability positions guaranteed by MetLife, Inc. | 181 | 116
Estimated fair value of collateral provided to counterparties by the subsidiaries | 181 | 114
Derivative Liability, Fair Value, Amount Offset Against Collateral | $ 0 | $ 2

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