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DERIVATIVES - SCHEDULE PRE-TAX GAINS (LOSSES) RECOGNIZED IN EARNINGS FOR DERIVATIVE INSTRUMENTS (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Derivative [Line Items] |  |  |
Gains (losses) on derivative instruments not designated as hedging instruments | $ 256.2 | $ 129.3 | $ (222.7)
Net pre-tax impact | 77.1 | (7.8) | 265.8
Embedded derivative |  |  |
Derivative [Line Items] |  |  |
Embedded derivatives related to fixed indexed annuities | (24.4) | 8.5 | 45.9
Embedded derivative | Embedded derivatives related to fixed indexed annuities |  |  |
Derivative [Line Items] |  |  |
Embedded derivatives related to fixed indexed annuities | 179.1 | 137.1 | (488.5)
Investment Income (Loss) | Fixed indexed call options |  |  |
Derivative [Line Items] |  |  |
Gains (losses) on derivative instruments not designated as hedging instruments | 255.8 | 129.0 | (206.6)
Gain (Loss) on Investments | Embedded derivative | Embedded derivative related to modified coinsurance agreement |  |  |
Derivative [Line Items] |  |  |
Gains (losses) on derivative instruments not designated as hedging instruments | $ 0.4 | $ 0.3 | $ (16.1)

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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4C Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 50 -Paragraph 4CC -SubTopic 10 -Topic 815 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4CC + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480237/815-40-50-5 + Details
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- Definition Net Increase or Decrease in the fair value of the embedded derivative or group of embedded derivatives included in earnings in the period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 15 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/815-15/tableOfContent + Details
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