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INVESTMENTS IN VARIABLE INTEREST ENTITIES - CHANGES IN ALLOWANCE (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward] |  |  |  |
Allowance at the beginning of the period | $ 66.1 | $ 54.2 | $ 56.0 | $ 7.6
Additions for securities for which credit losses were not previously recorded | 1.3 | 7.6 | 6.2 | 41.2
Additions for purchased securities with deteriorated credit | 0.0 | 0.0 | 0.0 | 0.0
Additions (reductions) for securities where an allowance was previously recorded | 2.3 | (6.4) | 9.9 | 13.1
Reduction for securities sold during the period | (0.3) | (3.4) | (2.7) | (9.9)
Reduction for securities for which the Company made the decision to sell where an allowance was previously recorded | 0.0 | 0.0 | 0.0 | 0.0
Write-offs | 0.0 | 0.0 | 0.0 | 0.0
Recoveries of previously written-off amount | 0.0 | 0.0 | 0.0 | 0.0
Allowance at the end of the period | 69.4 | 52.0 | 69.4 | 52.0
Corporate securities |  |  |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward] |  |  |  |
Allowance at the beginning of the period | 64.4 | 52.2 | 54.4 | 7.4
Additions for securities for which credit losses were not previously recorded | 1.2 | 7.2 | 5.9 | 39.8
Additions for purchased securities with deteriorated credit | 0.0 | 0.0 | 0.0 | 0.0
Additions (reductions) for securities where an allowance was previously recorded | 1.5 | (6.9) | 9.2 | 11.8
Reduction for securities sold during the period | (0.3) | (3.3) | (2.7) | (9.8)
Reduction for securities for which the Company made the decision to sell where an allowance was previously recorded | 0.0 | 0.0 | 0.0 | 0.0
Write-offs | 0.0 | 0.0 | 0.0 | 0.0
Recoveries of previously written-off amount | 0.0 | 0.0 | 0.0 | 0.0
Allowance at the end of the period | 66.8 | 49.2 | 66.8 | 49.2
Investments held by variable interest entities - corporate securities | Corporate securities |  |  |  |
Debt Securities, Available-for-sale, Allowance for Credit Loss [Roll Forward] |  |  |  |
Allowance at the beginning of the period | 4.5 | 12.2 | 5.5 | 3.7
Additions for securities for which credit losses were not previously recorded | 0.1 | 0.9 | 0.7 | 7.2
Additions for purchased securities with deteriorated credit | 0.0 | 0.0 | 0.0 | 0.0
Additions (reductions) for securities where an allowance was previously recorded | (0.6) | (5.7) | (0.5) | (2.5)
Reduction for securities sold during the period | (1.1) | (0.9) | (2.8) | (1.9)
Reduction for securities for which the Company made the decision to sell where an allowance was previously recorded | 0.0 | 0.0 | 0.0 | 0.0
Write-offs | 0.0 | 0.0 | 0.0 | 0.0
Recoveries of previously written-off amount | 0.0 | 0.0 | 0.0 | 0.0
Allowance at the end of the period | $ 2.9 | $ 6.5 | $ 2.9 | $ 6.5

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- Definition Amount of expense for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), for which no credit loss was previously recorded. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-9 + Details
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- Definition Amount of expense (reversal of expense) for allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), not intended to be sold and not more likely than not will be required to sell before recovery of amortized cost basis, with previously recorded allowance. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-9 + Details
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- Definition Amount of increase in allowance for credit loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale) and beneficial interest, purchased with credit deterioration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 9 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479106/326-30-50-9 + Details
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