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FINANCING ARRANGEMENTS - Schedule of Components of Debt (Details) - USD ($)
$ in Millions
 9 Months Ended 12 Months Ended
Sep. 30, 2025
Dec. 31, 2024
Debt Instrument [Line Items]    
Principal Amount $ 1,999.1 $ 2,099.2
Unamortized discount and debt issuance cost 27.2 32.2
Net Debt 1,971.9 2,067.0
Less short-term and current portion of long-term debt 0.5 7.7
Less short-term debt, Unamortized discount and debt issuance cost 0.0 0.0
Less short-term debt, Net Debt 0.5 7.7
Total long-term debt, net of current portion, Principal Amount 1,998.6 2,091.5
Total long-term debt, net of current position, Unamortized discount and debt issuance cost 27.2 32.2
Total long-term debt, net of current portion, Net Debt 1,971.4 2,059.3
Senior secured revolving credit facility due 2030 | 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 $ 620.7 $ 720.7
Unamortized discount and debt issuance cost 12.5 15.5
Net Debt $ 608.2 $ 705.2
Weighted average interest rate 6.10% 7.30%
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 6.5 7.5
Net Debt $ 718.5 $ 717.5
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 $ 650.0
Unamortized discount and debt issuance cost 8.2 9.2
Net Debt $ 641.8 $ 640.8
Weighted average interest rate 6.25% 6.25%
Other Debt    
Debt Instrument [Line Items]    
Principal Amount $ 3.4 $ 3.5
Unamortized discount and debt issuance cost 0.0 0.0
Net Debt $ 3.4 $ 3.5