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ACCOUNTING POLICIES (Details 1) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Accounting Policies [Abstract]      
Gain (loss) on disposition of property, plant and equipment $ 1.4 $ 0.8  
Asset retirement obligation non-current portion 56.8 47.0  
Asset retirement obligation revision of estimate 10.1 1.9  
Finite-lived intangible asset impairment charge $ 0.0 $ 0.0 $ 0.0
Average remaining life expectancy of the inactive participants in the defined benefit pension plan (in years) 17 years 18 years  
Short-term investments $ 0.0 $ 0.0 $ 0.0