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FINANCING ARRANGEMENTS - Schedule of Components of Debt (Details) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2024 | Dec. 31, 2023
Debt Instrument [Line Items] |  |
Principal Amount | $ 2,105.7 | $ 2,110.5
Unamortized discount and debt issuance cost | 27.2 | 30.5
Net Debt | 2,078.5 | 2,080.0
Less short-term and current portion of long-term debt | 659.5 | 9.5
Less short-term debt, Unamortized discount and debt issuance cost | 1.8 | 0.0
Less short-term debt, Net Debt | 657.7 | 9.5
Total long-term debt, net of current portion, Principal Amount | 1,446.2 | 2,101.0
Total long-term debt, net of current position, Unamortized discount and debt issuance cost | 25.4 | 30.5
Total long-term debt, net of current portion, Net Debt | 1,420.8 | 2,070.5
Senior secured revolving credit facility due 2026 | Revolving Credit Facility |  |
Debt Instrument [Line Items] |  |
Principal Amount | 0.0 | 0.0
Unamortized discount and debt issuance cost | 0.0 | 0.0
Net Debt | $ 0.0 | $ 0.0
Weighted average interest rate | 0.00% | 0.00%
Senior secured term loan due 2029 | Secured Debt |  |
Debt Instrument [Line Items] |  |
Principal Amount | $ 724.3 | $ 727.9
Unamortized discount and debt issuance cost | 17.3 | 18.9
Net Debt | $ 707.0 | $ 709.0
Weighted average interest rate | 7.34% | 7.88%
5.75% senior notes due 2025 | Senior Notes |  |
Debt Instrument [Line Items] |  |
Interest rate, stated percentage | 5.75% | 5.75%
Principal Amount | $ 650.0 | $ 650.0
Unamortized discount and debt issuance cost | 1.8 | 2.8
Net Debt | $ 648.2 | $ 647.2
Weighted average interest rate | 5.75% | 5.75%
7.125% senior notes due 2030 | Senior Notes |  |
Debt Instrument [Line Items] |  |
Interest rate, stated percentage | 7.125% | 7.125%
Principal Amount | $ 725.0 | $ 725.0
Unamortized discount and debt issuance cost | 8.1 | 8.8
Net Debt | $ 716.9 | $ 716.2
Weighted average interest rate | 7.125% | 7.125%
Other Debt |  |
Debt Instrument [Line Items] |  |
Principal Amount | $ 6.4 | $ 7.6
Unamortized discount and debt issuance cost | 0.0 | 0.0
Net Debt | $ 6.4 | $ 7.6

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