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Investments (Fixed Maturity Securities AFS - Sales and Disposals and Credit Loss) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Proceeds | $ 8,106 | $ 8,412 | $ 14,458 | $ 23,456
Gross investment gains | 121 | 73 | 277 | 366
Gross investment (losses) | (358) | (213) | (670) | (1,069)
Realized gains (losses) on sales and disposals | (237) | (140) | (393) | (703)
Net credit loss (provision) release (change in ACL recognized in earnings) | (9) | (7) | 62 | (17)
Impairment (losses) | 0 | (849) | 0 | (856)
Net credit loss (provision) release and impairment (losses) | (9) | (856) | 62 | (873)
Net investment gains (losses) | (195) | (20) | (330) | (566)
Equity securities | 0 | 15 | (2) | 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) | (19) | 17 | 11 | 58
Net investment gains (losses) | (19) | 32 | 9 | 80
Fixed Maturity Securities |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |
Net investment gains (losses) | $ (246) | $ (996) | $ (331) | $ (1,576)

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