Investments (Investment Related Gains (Losses) Net) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2025	Mar. 31, 2024
Investments [Abstract]
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net	$ (6)	$ (20)
Gain on investment activity	36	32
Available-for-sale Securities, Realized Losses, Excluding Other than Temporary Impairments	(87)	(134)
Gain (Loss) on Sale of Equity Investments	(1)	4
Other impairment losses and change in mortgage loan provision	4	(10)
Gains (Losses) on Sales of Other Real Estate	(5)	(8)
Derivatives and other, net	(2)	(99)
Total investment related gains (losses), net	(79)	(149)
Change In Fair Value Of Certain Limited Partnership Investments And Other, Net	(7)	1
Gain (Loss) on Sale of Derivatives	(11)	77
Gain (Loss) on Sale of Other Investments	$ 0	$ 8

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

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Net realized gains or losses on investments during the period related to the change in value of embedded derivatives and other realized gains and losses not otherwise categorized.

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Other impairment losses and change in mortgage loan provision.

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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).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Amount of realized gain on 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 realized loss on 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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Amount of gain (loss) included in earnings for investments classified as other.

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The net gain (loss) resulting from sales and other disposals of other real estate owned, increases (decreases) in the valuation allowance for foreclosed real estate, and write-downs of other real estate owned after acquisition or physical possession.

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Amount of realized gain (loss) on investment.

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