Quarterly report pursuant to Section 13 or 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)
shares in Millions, $ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2024
USD ($)
shares
Mar. 31, 2023
USD ($)
shares
Dec. 31, 2023
USD ($)
segment
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Fair value of long-term debt $ 5,300.0   $ 5,300.0
Carrying value of long-term debt 5,500.0   $ 5,500.0
Number of acquisitions | segment     2
Carrying value of equity investment   $ 77.3  
Unrealized gain (loss) on equity investment   $ 3.1  
Other Current Assets      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Restricted cash and cash equivalents 29.9    
Other Current Liabilities      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Restricted cash and cash equivalents $ 29.9    
Stock options      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Antidilutive stock options (in shares) | shares 0.0 0.0