Quarterly report pursuant to Section 13 or 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)

v3.24.3
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)
shares in Millions, $ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2024
USD ($)
shares
Sep. 30, 2023
USD ($)
shares
Sep. 30, 2024
USD ($)
acquisition
shares
Sep. 30, 2023
USD ($)
shares
Dec. 31, 2023
USD ($)
acquisition
Aug. 07, 2023
USD ($)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Fair value of long-term debt $ 5,400.0   $ 5,400.0   $ 5,300.0  
Carrying value of long-term debt 5,500.0   $ 5,500.0   $ 5,500.0  
Number of acquisitions | acquisition     0   2  
Carrying value of equity investment           $ 88.9
Unrealized gain (loss) on equity investment   $ (0.2)   $ 7.0    
Gain on sale of investment       $ 6.2    
Other Current Assets            
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Restricted cash and cash equivalents 58.3   $ 58.3      
Other Current Liabilities            
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Restricted cash and cash equivalents $ 58.3   $ 58.3      
Stock options            
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Antidilutive stock options (in shares) | shares 0.0 0.0 0.0 0.0