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Investments - Schedule of Net Gains (Losses) on Investments and Derivatives by Asset Type (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Realized capital gains and losses by asset type |  |  |  |
Net gains (losses) on investments and derivatives | $ 252 | $ 243 | $ (241) | $ (24)
Fixed income securities |  |  |  |
Realized capital gains and losses by asset type |  |  |  |
Net gains (losses) on investments and derivatives | 107 | 105 | (271) | (92)
Equity securities |  |  |  |
Realized capital gains and losses by asset type |  |  |  |
Net gains (losses) on investments and derivatives | 191 | 119 | 243 | 195
Mortgage loans |  |  |  |
Realized capital gains and losses by asset type |  |  |  |
Net gains (losses) on investments and derivatives | (6) | (1) | (6) | 0
Limited partnership interests |  |  |  |
Realized capital gains and losses by asset type |  |  |  |
Net gains (losses) on investments and derivatives | (32) | (8) | (24) | (13)
Derivatives |  |  |  |
Realized capital gains and losses by asset type |  |  |  |
Net gains (losses) on investments and derivatives | 6 | 20 | (78) | (3)
Other investments |  |  |  |
Realized capital gains and losses by asset type |  |  |  |
Net gains (losses) on investments and derivatives | (14) | 8 | (38) | 12
Other |  |  |  |
Realized capital gains and losses by asset type |  |  |  |
Net gains (losses) on investments and derivatives | $ 0 | $ 0 | $ (67) | $ (123)

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