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DEFERRED ACQUISITION COSTS, PRESENT VALUE OF FUTURE PROFITS AND SALES INDUCEMENTS - PRESENT VALUE OF FUTURE PROFITS (Details) - USD ($) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2024 | Sep. 30, 2023
Movement in Present Value of Future Insurance Profits [Roll Forward] |  |
Beginning of period | $ 180.7 | $ 203.7
Amortization expense | (15.0) | (17.5)
End of period | 165.7 | 186.2
Supplemental health |  |
Movement in Present Value of Future Insurance Profits [Roll Forward] |  |
Beginning of period | 141.0 | 154.0
Amortization expense | (9.3) | (9.8)
End of period | 131.7 | 144.2
Medicare supplement |  |
Movement in Present Value of Future Insurance Profits [Roll Forward] |  |
Beginning of period | 20.6 | 27.5
Amortization expense | (3.8) | (5.3)
End of period | 16.8 | 22.2
Long-term care |  |
Movement in Present Value of Future Insurance Profits [Roll Forward] |  |
Beginning of period | 5.2 | 6.2
Amortization expense | (0.6) | (0.8)
End of period | 4.6 | 5.4
Traditional life |  |
Movement in Present Value of Future Insurance Profits [Roll Forward] |  |
Beginning of period | 12.9 | 14.8
Amortization expense | (1.2) | (1.4)
End of period | 11.7 | 13.4
Fixed indexed annuities |  |
Movement in Present Value of Future Insurance Profits [Roll Forward] |  |
Beginning of period | 0.7 | 0.8
Amortization expense | (0.1) | (0.1)
End of period | 0.6 | 0.7
Fixed interest annuities |  |
Movement in Present Value of Future Insurance Profits [Roll Forward] |  |
Beginning of period | 0.3 | 0.4
Amortization expense | 0.0 | (0.1)
End of period | $ 0.3 | $ 0.3

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- Definition Amount of amortization expense (reversal of expense) for present value of future profits of insurance contract acquired in business combination. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 20 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479735/944-20-S99-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 230 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-2 + Details
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