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Investments (Net Unrealized Investment Gains (Losses)) (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
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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This item presents net unrealized investment gains (losses) allocated from insurance liability loss recognition.

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This item presents net unrealized investment gains (losses) related to deferred income tax benefit (expense).

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This item presents net unrealized investment gains (losses) related to other investments.

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This item presents the subtotal of net unrealized investment gains (losses) relating to fixed maturity securities, equity securities, derivatives and other investments.

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