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OTHER OPERATING STATEMENT DATA - SCHEDULE OF CHANGES IN PRESENT VALUE OF FUTURE INSURANCE PROFITS (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Movement in Present Value of Future Insurance Profits [Roll Forward] |  |  |
Beginning of period | $ 180.7 | $ 203.7 | $ 230.1
Amortization expense | (19.7) | (23.0) | (26.4)
End of period | 161.0 | 180.7 | 203.7
Supplemental health |  |  |
Movement in Present Value of Future Insurance Profits [Roll Forward] |  |  |
Beginning of period | 141.0 | 154.0 | 168.1
Amortization expense | (12.2) | (13.0) | (14.1)
End of period | 128.8 | 141.0 | 154.0
Medicare supplement |  |  |
Movement in Present Value of Future Insurance Profits [Roll Forward] |  |  |
Beginning of period | 20.6 | 27.5 | 36.5
Amortization expense | (4.9) | (6.9) | (9.0)
End of period | 15.7 | 20.6 | 27.5
Long-term care |  |  |
Movement in Present Value of Future Insurance Profits [Roll Forward] |  |  |
Beginning of period | 5.2 | 6.2 | 7.3
Amortization expense | (0.8) | (1.0) | (1.1)
End of period | 4.4 | 5.2 | 6.2
Traditional life |  |  |
Movement in Present Value of Future Insurance Profits [Roll Forward] |  |  |
Beginning of period | 12.9 | 14.8 | 16.9
Amortization expense | (1.6) | (1.9) | (2.1)
End of period | 11.3 | 12.9 | 14.8
Fixed indexed annuities |  |  |
Movement in Present Value of Future Insurance Profits [Roll Forward] |  |  |
Beginning of period | 0.7 | 0.8 | 0.9
Amortization expense | (0.2) | (0.1) | (0.1)
End of period | 0.5 | 0.7 | 0.8
Fixed interest annuities |  |  |
Movement in Present Value of Future Insurance Profits [Roll Forward] |  |  |
Beginning of period | 0.3 | 0.4 | 0.4
Amortization expense | 0.0 | (0.1) | 0.0
End of period | $ 0.3 | $ 0.3 | $ 0.4

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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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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- Definition Amount, after accumulated amortization, of 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 944 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2B -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479432/944-30-50-2B Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(10)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478777/944-210-S99-1 + Details
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