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SUPPLEMENTAL CASH FLOW INFORMATION (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Supplemental Cash Flow Elements [Abstract] |  |  |
Cash paid for income taxes | $ 1.9 | $ 1.8 | $ 4.6
Cash paid for interest | 1.4 | 0.0 | 4.4
Cash received for income tax receivables | 0.0 | 0.0 | 90.0
Change in operating lease right-of-use assets and lease liabilities |  |  |
Operating lease right-of-use assets | (31.0) | 46.9 | 41.8
Operating lease liabilities | 36.7 | (46.9) | (48.1)
Tenant improvement allowance not yet received | 0.0 | 22.9 | 0.0
Purchases of property, plant and equipment and capitalization of internal-use software in accounts payable and accrued liabilities | $ 6.9 | $ 10.0 | $ 0.0

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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482913/230-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-25 + Details
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