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FAIR VALUE MEASUREMENTS - Narrative (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities $ (1,973.7) $ (2,273.8)
Assets 5,374.4 4,537.9
Recurring fair value measurement    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities (1,117.1) (817.7)
Assets 472.0 501.4
Recurring fair value measurement | Embedded derivative | Notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 0.0  
Recurring fair value measurement | Embedded derivative | Term Loan    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 26.7 5.1
Not measured at fair value in statement of financial position but for which fair value is disclosed    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities (1,084.7) (871.8)
Assets 472.0 501.4
Not measured at fair value in statement of financial position but for which fair value is disclosed | Embedded derivative    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 0.0 0.0
Not measured at fair value in statement of financial position but for which fair value is disclosed | Embedded derivative | Notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets   0.0
Not measured at fair value in statement of financial position but for which fair value is disclosed | Embedded derivative | Term Loan    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Assets 26.7 5.1
TARF    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities   (1.4)
TARF | Recurring fair value measurement    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities   (1.4)
TARF | Not measured at fair value in statement of financial position but for which fair value is disclosed    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities   (1.4)
Extendible forward arrangement | Recurring fair value measurement    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities   (0.5)
Extendible forward arrangement | Not measured at fair value in statement of financial position but for which fair value is disclosed    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities   (0.5)
Long-term borrowings | Recurring fair value measurement | Notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities (435.8) (388.3)
Long-term borrowings | Recurring fair value measurement | Term Loan    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities (449.2) (411.0)
Long-term borrowings | Recurring fair value measurement | Credit facility    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities (220.0) 0.0
Long-term borrowings | Recurring fair value measurement | Equipment loans    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities (2.3) (7.3)
Long-term borrowings | Not measured at fair value in statement of financial position but for which fair value is disclosed | Notes    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities (452.0) (452.5)
Long-term borrowings | Not measured at fair value in statement of financial position but for which fair value is disclosed | Term Loan    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities (400.8) (400.9)
Long-term borrowings | Not measured at fair value in statement of financial position but for which fair value is disclosed | Credit facility    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities (220.0)  
Long-term borrowings | Not measured at fair value in statement of financial position but for which fair value is disclosed | Equipment loans    
Disclosure Of Fair Value Measurement Of Assets And Liabilities [Line Items]    
Liabilities $ (2.1) $ (7.3)