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Equity (Net Unrealized Investment Gains Losses) (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
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Components of net unrealized investment gains (losses) included in accumulated other comprehensive income |  |  |
Fixed maturity securities AFS | $ (29,262) | $ 29,461 | $ 44,415
Derivatives | 1,976 | 2,061 | 1,924
Other | 549 | 389 | 267
Subtotal | (26,737) | 31,911 | 46,606
Policyholder liabilities (1) | (1,487) | (4,978) | (10,797)
DAC, VOBA and DSI | 4,034 | (3,208) | (4,050)
Subtotal | 2,547 | (8,186) | (14,847)
Deferred income tax benefit (expense) | 4,914 | (6,031) | (8,009)
Net unrealized investment gains (losses) | (19,276) | 17,694 | 23,750
Net unrealized investment gains (losses) attributable to noncontrolling interests | (18) | (23) | (20)
Net unrealized investment gains (losses) attributable to MetLife, Inc. | $ (19,294) | $ 17,671 | $ 23,730

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