Quarterly report pursuant to Section 13 or 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)

v3.20.2
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Fair value of long-term debt $ 4,700.0   $ 4,700.0   $ 3,600.0
Carrying value of long-term debt 4,400.0   4,400.0   $ 3,400.0
Other Current Assets          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Restricted cash and cash equivalents 12.5   12.5    
Other Current Liabilities          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Restricted cash and cash equivalents $ 12.5   $ 12.5    
Stock options          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]          
Antidilutive stock options (in shares) 0.7 1.2 0.8 1.3