ACQUISITIONS - Acquisition of Geist (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Jun. 30, 2018
Feb. 01, 2018
Schedule of total aggregate purchase consideration          
Purchase consideration, net of cash acquired $ 0.0 $ 124.3 $ 211.4    
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]          
Goodwill 605.8 $ 634.0 $ 596.1    
Acquisition of Geist          
Additional Information          
Acquired assets and assumed liabilities in cash       $ 2.5 $ 123.6
Schedule of total aggregate purchase consideration          
Purchase consideration 126.1        
Less: Cash acquired (1.8)        
Purchase consideration, net of cash acquired 124.3        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]          
Current assets 18.1        
Property, plant and equipment, net 28.5        
Intangible assets 40.4        
Total identifiable assets 87.0        
Current liabilities 5.3        
Total identifiable liabilities assumed 5.3        
Goodwill 42.6        
Purchase consideration, net of cash acquired 124.3        
Total identifiable intangible assets acquired, their useful lives and fair values          
Total finite-lived identifiable intangible assets $ 40.4        
Weighted average useful life of finite-lived intangibles (years) 13 years 6 months        
Acquisition of Geist | Customer relationships          
Total identifiable intangible assets acquired, their useful lives and fair values          
Total finite-lived identifiable intangible assets $ 21.9        
Weighted average useful life of finite-lived intangibles (years) 15 years        
Acquisition of Geist | Developed Technology          
Total identifiable intangible assets acquired, their useful lives and fair values          
Total finite-lived identifiable intangible assets $ 12.4        
Weighted average useful life of finite-lived intangibles (years) 15 years        
Acquisition of Geist | Trademarks          
Total identifiable intangible assets acquired, their useful lives and fair values          
Total finite-lived identifiable intangible assets $ 6.1        
Weighted average useful life of finite-lived intangibles (years) 5 years