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Investments (Components of Net Investment Gains Losses - Transaction Type) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Gain (Loss) on Securities [Line Items] |  |  |
Realized gains (losses) on investments sold or disposed | $ (436) | $ (1,028) | $ (880)
Investments Impairment | 101 | 1,498 | 40
Change in ACL recognized in earnings | (248) | (271) | (134)
Unrealized net gains (losses) recognized in earnings | (62) | 54 | (100)
Total recognized gains (losses) | (310) | (217) | (234)
Non-investment portfolio gains (losses) | (337) | (81) | (106)
Net investment gains (losses) | (1,184) | (2,824) | (1,260)
Fixed maturity securities AFS (1) | (731) | $ (2,471) | $ (1,912)
Reinsurance Risk Transfer Transaction |  |  |
Gain (Loss) on Securities [Line Items] |  |  |
Realized gains (losses) on investments sold or disposed | 1,200 |  |
Investments Impairment | 1,300 |  |
Other Asset Impairment Charges | (56) |  |
Fixed maturity securities AFS (1) | 95 |  |
Private Equity Funds |  |  |
Gain (Loss) on Securities [Line Items] |  |  |
Realized gains (losses) on investments sold or disposed | 46 |  |
Equity Method Investment, Amount Sold | 798 |  |
Proceeds from Sale of Equity Method Investments | 752 |  |
Commercial Mortgage Loans | Reinsurance Risk Transfer Transaction |  |  |
Gain (Loss) on Securities [Line Items] |  |  |
Gain (Loss) on Sale of Mortgage Loans | $ (2) |  |

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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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