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Investments (Investment Related Gains (Losses) Net) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Investments [Abstract] |  |  |  |
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net | $ 7 | $ 3 | $ (31) | $ (21)
Gain on investment activity | 12 | 20 | 54 | 65
Available-for-sale Securities, Realized Losses, Excluding Other than Temporary Impairments | (61) | (106) | (173) | (236)
Gain (Loss) on Sale of Equity Investments | (2) | 7 | (4) | (16)
Other impairment losses and change in mortgage loan provision | (17) | (5) | (23) | (8)
Derivatives and other, net | 7 | 7 | 24 | 26
Total investment related gains (losses), net | (126) | (154) | (326) | (533)
Change In Fair Value Of Certain Limited Partnership Investments And Other, Net | 25 | 0 | 32 | 29
Impairment Losses On Debt Securities Available for Sale | 0 | (12) | (1) | (15)
Gain (Loss) on Sale of Derivatives | (98) | (51) | (222) | (251)
Embedded Derivative, Gain (Loss) on Embedded Derivative, Net | $ 1 | $ (17) | $ 18 | $ (106)

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- Definition 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 -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-9 + Details
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