FAIR VALUE MEASUREMENTS (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-lived assets impairment	$ 1.3	$ 23.0	$ 20.9	$ 3,244.7
Property, Plant and Equipment
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Long-lived assets impairment				161.3
Equity method investment impairment, Impairment			36.7	0.0
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	353.3	31.6	353.3
Equity method investment impairment, Fair value	$ 85.4	$ 0.0	$ 85.4	$ 0.0
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%