Quarterly report pursuant to Section 13 or 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)

v3.23.2
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)
shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2023
USD ($)
shares
Jun. 30, 2022
USD ($)
segment
shares
Jun. 30, 2023
USD ($)
shares
Jun. 30, 2022
USD ($)
shares
Dec. 31, 2022
USD ($)
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Fair value of long-term debt $ 5,200.0   $ 5,200.0   $ 4,800.0
Carrying value of long-term debt 5,600.0   5,600.0   $ 5,300.0
Carrying value of equity investment 87.7 $ 54.1 87.7 $ 54.1  
Unrealized gain on on equity investment 4.3   7.2    
Unrealized loss on equity investment   $ 34.2   6.4  
Number of equity investments sold | segment   2      
Loss to fully impair investment 6.2 $ 27.5 6.2 $ 27.5  
Other Current Assets          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Restricted cash and cash equivalents 25.7   25.7    
Other Current Liabilities          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Restricted cash and cash equivalents $ 25.7   $ 25.7    
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