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Investments (Fixed Maturity Securities AFS - Sales and Disposals and Credit Loss) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Proceeds | $ 6,815 | $ 9,263 | $ 21,273 | $ 32,719
Gross investment gains | 111 | 63 | 388 | 429
Gross investment (losses) | (228) | (334) | (898) | (1,403)
Realized gains (losses) on sales and disposals | (117) | (271) | (510) | (974)
Net credit loss (provision) release (change in ACL recognized in earnings) | (40) | 17 | 22 | 0
Impairment (losses) | 0 | (444) | 0 | (1,300)
Net credit loss (provision) release and impairment (losses) | (40) | (427) | 22 | (1,300)
Net investment gains (losses) | (39) | (281) | (369) | (847)
Equity securities | 27 | 0 | 25 | 22
Changes in estimated fair value subsequent to purchase of equity securities still held at the end of the respective periods and recognized in net investment gains (losses) | (58) | (14) | (47) | 44
Net investment gains (losses) | (31) | (14) | (22) | 66
Fixed Maturity Securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Net investment gains (losses) | $ (157) | $ (698) | $ (488) | $ (2,274)

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