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FAIR VALUE MEASUREMENTS (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Long-lived assets impairment $ 0.8 $ 33.7 $ 19.6 $ 3,221.7
Property, Plant and Equipment        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Long-lived assets impairment     18.8 138.3
Property, Plant and Equipment | Fair Value, Nonrecurring        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Long-lived assets, fair value $ 31.6 $ 314.3 $ 31.6 $ 314.3
Property, Plant and Equipment | Fair Value, Nonrecurring | Measurement Input, Discount Rate        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Fair value unobservable input rate (in percent) 10.80% 10.80% 10.80% 10.80%