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FINANCING ARRANGEMENTS - Schedule of Components of Debt (Details) - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 | Dec. 31, 2023 | Sep. 19, 2024
Debt Instrument [Line Items] |  |  |
Principal Amount | $ 2,101.4 | $ 2,110.5 |
Unamortized discount and debt issuance cost | 33.7 | 30.5 |
Net Debt | 2,067.7 | 2,080.0 |
Less short-term and current portion of long-term debt | 7.8 | 9.5 |
Less short-term debt, Unamortized discount and debt issuance cost | 0.0 | 0.0 |
Less short-term debt, Net Debt | 7.8 | 9.5 |
Total long-term debt, net of current portion, Principal Amount | 2,093.6 | 2,101.0 |
Total long-term debt, net of current position, Unamortized discount and debt issuance cost | 33.7 | 30.5 |
Total long-term debt, net of current portion, Net Debt | 2,059.9 | 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 | $ 722.5 | $ 727.9 |
Unamortized discount and debt issuance cost | 16.4 | 18.9 |
Net Debt | $ 706.1 | $ 709.0 |
Weighted average interest rate | 7.31% | 7.88% |
5.750% senior notes due 2025 | Senior Notes |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate, stated percentage | 5.75% |  | 5.75%
Principal Amount |  | $ 650.0 |
Unamortized discount and debt issuance cost |  | 2.8 |
Net Debt |  | $ 647.2 |
Weighted average interest rate |  | 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 | 7.8 | 8.8 |
Net Debt | $ 717.2 | $ 716.2 |
Weighted average interest rate | 7.125% | 7.125% |
6.250% senior notes due 2031 | Senior Notes |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate, stated percentage | 6.25% |  | 6.25%
Principal Amount | $ 650.0 |  |
Unamortized discount and debt issuance cost | 9.5 |  |
Net Debt | $ 640.5 |  |
Weighted average interest rate | 6.25% |  |
Other Debt |  |  |
Debt Instrument [Line Items] |  |  |
Principal Amount | $ 3.9 | $ 7.6 |
Unamortized discount and debt issuance cost | 0.0 | 0.0 |
Net Debt | $ 3.9 | $ 7.6 |

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