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Investments (Components of Net Investment Gains Losses - Asset Type) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Marketable Securities, Gain (Loss) [Abstract] |  |  |  |
Fixed maturity securities AFS | $ (124) | $ (246) | $ (368) | $ (331)
Net investment gains (losses) | 45 | (19) | 33 | 9
Other net investment gains (losses): |  |  |  |
Mortgage loans | (269) | (9) | (461) | (95)
Real estate and real estate joint ventures (excluding changes in estimated fair value) | 3 | 12 | 3 | 47
Other limited partnership interests (excluding changes in estimated fair value) | 21 | (9) | 20 | (59)
Other gains (losses) | (33) | 23 | (38) | 29
Subtotal - investment portfolio gains (losses) | (357) | (248) | (811) | (400)
Change In Estimated Fair Value Of Other Limited Partnership Interests And Real Estate Joint Ventures | (3) | 3 | 0 | 6
Non-investment portfolio gains (losses) | 87 | (176) | 151 | (402)
Subtotal | 84 | (173) | 151 | (396)
Net investment gains (losses) | $ (273) | $ (421) | $ (660) | $ (796)

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- Definition Amount of unrealized and realized gain (loss) on 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 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(9)(a)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(7)(c)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2 + Details
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