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GOODWILL AND INTANGIBLE ASSETS, NET GOODWILL AND INTANGIBLE ASSETS, NET - INTANGIBLE ASSETS (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Definite-lived intangible assets:      
Gross Carrying Amount $ 64.0   $ 64.4
Accumulated Amortization (54.8)   (54.7)
Net Carrying Amount 9.2   9.7
Aggregate Amortization Expense 0.4 $ 0.4  
Finite-Lived Intangible Assets, Future Amortization Expense [Abstract]      
2020 1.4    
2021 1.3    
2022 1.3    
2023 0.8    
2024 $ 0.6    
Technology      
Definite-lived intangible assets:      
Weighted Average Life (in years) 7 years    
Gross Carrying Amount $ 9.2   9.4
Accumulated Amortization (8.7)   (8.8)
Net Carrying Amount $ 0.5   0.6
Customer Relationships      
Definite-lived intangible assets:      
Weighted Average Life (in years) 22 years    
Gross Carrying Amount $ 25.5   25.6
Accumulated Amortization (22.9)   (22.8)
Net Carrying Amount $ 2.6   2.8
Land Use Rights      
Definite-lived intangible assets:      
Weighted Average Life (in years) 81 years    
Gross Carrying Amount $ 4.2   4.3
Accumulated Amortization (0.7)   (0.7)
Net Carrying Amount $ 3.5   3.6
Other      
Definite-lived intangible assets:      
Weighted Average Life (in years) 8 years    
Gross Carrying Amount $ 25.1   25.1
Accumulated Amortization (22.5)   (22.4)
Net Carrying Amount $ 2.6   $ 2.7