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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, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Marketable Securities, Gain (Loss) [Abstract] |  |  |  |
Fixed maturity securities AFS | $ (246) | $ (996) | $ (331) | $ (1,576)
Net investment gains (losses) | (19) | 32 | 9 | 80
Other net investment gains (losses): |  |  |  |
Mortgage loans | (9) | (41) | (95) | (205)
Real estate and real estate joint ventures (excluding changes in estimated fair value) | 12 | 13 | 47 | 31
Other limited partnership interests (excluding changes in estimated fair value) | (9) | 3 | (59) | 12
Other gains (losses) | 23 | 43 | 29 | 20
Subtotal - investment portfolio gains (losses) | (248) | (946) | (400) | (1,638)
Change In Estimated Fair Value Of Other Limited Partnership Interests And Real Estate Joint Ventures | 3 | 2 | 6 | (3)
Non-investment portfolio gains (losses) | (176) | (95) | (402) | (82)
Subtotal | (173) | (93) | (396) | (85)
Net investment gains (losses) | $ (421) | $ (1,039) | $ (796) | $ (1,723)

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