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Investments (Net Unrealized Investment Gains (Losses)) (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
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Components of net unrealized investment gains (losses) included in accumulated other comprehensive loss |  |
Fixed maturity securities | $ (7,054) | $ (6,119)
Derivatives | 401 | 351
Other | (8) | 2
Subtotal | (6,661) | (5,766)
Amounts allocated from: Future policy benefits | 813 | 652
Deferred income tax benefit (expense) | 1,228 | 1,074
Net unrealized investment gains (losses) | $ (4,620) | $ (4,040)

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- Definition This item presents net unrealized investment gains (losses) allocated from insurance liability loss recognition. + References No definition available. + Details
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- Definition This item presents net unrealized investment gains (losses) related to fixed maturity securities that were temporarily impaired. + References No definition available. + Details
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- Definition This item presents net unrealized investment gains (losses) related to deferred income tax benefit (expense). + References No definition available. + Details
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- Definition This item presents net unrealized investment gains (losses) related to other investments. + References No definition available. + Details
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- Definition This item presents the subtotal of net unrealized investment gains (losses) relating to fixed maturity securities, equity securities, derivatives and other investments. + References No definition available. + Details
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