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INVESTMENTS - TOTAL INVESTMENT GAINS (LOSSES) (Details) - USD ($) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Realized investment gains (losses): |  |  |  |
Total realized investment losses | $ (12,900,000) | $ (13,100,000) | $ (38,000,000.0) | $ (49,400,000)
Change in allowance for credit losses | 8,000,000.0 | 1,600,000 | (2,600,000) | 7,200,000
Change in fair value of equity securities | 1,400,000 | 2,800,000 | 3,500,000 | 3,000,000.0
Other changes in fair value | 500,000 | 9,800,000 | 8,900,000 | 27,100,000
Gain on liquidation of variable interest entities | 0 | 100,000 | 0 | 3,900,000
Other investment gains (losses) | 9,900,000 | 14,300,000 | 9,800,000 | 41,200,000
Total investment gains (losses) | (3,000,000.0) | 1,200,000 | (28,200,000) | (8,200,000)
Increase (decrease) in equity securities, FV-NI, held at end of period | 1,700,000 | 2,800,000 | 5,900,000 | 3,100,000
Change in estimated fair value of trading securities | 3,000,000.0 | 6,100,000 | 10,100,000 | 10,800,000
Embedded Derivative Related to Fixed Maturity Securities |  |  |  |
Realized investment gains (losses): |  |  |  |
Increase (decrease) in fair value of certain fixed maturity investments with embedded derivatives | 0 | 8,100,000 | 7,100,000 | 25,200,000
Reinsurance Contract | Coinsurance |  |  |  |
Realized investment gains (losses): |  |  |  |
Increase (decrease) in fair value of certain fixed maturity investments with embedded derivatives | 500,000 | 1,700,000 | 1,800,000 | 1,900,000
Total Fixed Maturities, Available For Sale |  |  |  |
Realized investment gains (losses): |  |  |  |
Gross realized gains on sales of fixed maturities, available for sale | 1,900,000 | 6,300,000 | 4,800,000 | 9,300,000
Gross realized losses on sales of fixed maturities, available for sale | (18,100,000) | (12,800,000) | (42,700,000) | (46,300,000)
Equity securities, net | 700,000 | 0 | 200,000 | (100,000)
Other, net | $ 2,600,000 | $ (6,600,000) | $ (300,000) | $ (12,300,000)

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