Quarterly report pursuant to Section 13 or 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)

v3.19.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Fair value of long-term debt $ 2,700.0   $ 2,600.0
Carrying value of long-term debt 2,700.0   $ 2,600.0
Other Current Assets      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Restricted cash and cash equivalents 20.9    
Other Current Liabilities      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Restricted cash and cash equivalents $ 20.9    
Stock options      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]      
Antidilutive stock options 1.4 0.5