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Investments (Investment Related Gains (Losses) Net) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale [Abstract]
Other than Temporary Impairment Losses, Investments	$ (38)	$ (6)	$ (11)
Impairment Losses On Debt Securities Available for Sale	(3)	(17)	(1)
Available-for-sale Securities, Realized Losses, Excluding Other than Temporary Impairments	(275)	(396)	(65)
Gain (Loss) on Sale of Equity Investments	(1)	(21)	25
Gains (Losses) on Sales of Investment Real Estate	(16)	(16)	29
Available-for-sale Securities, Gross Realized Gains	72	192	299
Change in fair value of certain limited partnership investments and other, net	48	38	169
Gain (Loss) On Sale of Free Standing Derivatives	(129)	(166)	(10)
Gain (Loss) on Sale of Derivatives	(163)	(173)	107
Other investment related gains (losses), net	24	26	25
Realized Investment Gains (Losses)	$ (481)	$ (539)	$ 567

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Change In Fair Value Of Certain Limited Partnership Investments And Other, Net

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Amount of increase (decrease) in allowance for credit loss of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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The difference between the book value and the sale price of options, swaps, futures, forward contracts, and other derivative instruments. This element refers to the gain (loss) included in earnings.

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The net gain (loss) resulting from sales and other disposals of real estate owned for investment purposes.

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