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REVENUES (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Contract with Customer, Liability [Abstract]      
Contract with customer, liability $ 41.4 $ 57.1 $ 31.7
Revenue recognized included in beginning balance (36.1) (15.6)  
Net additions 20.4 41.0  
Contract with customer, liability, current 23.7 22.2  
Contract with customer, liability, noncurrent 17.7 $ 34.9  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenue, Remaining Performance Obligation, Amount $ 1,786.5    
Revenue, Remaining Performance Obligation, Contract Term 5 to 10 years    
Remaining Contract Terms [Member]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenue, Remaining Performance Obligation, Contract Term one month to 23 years    
2021 [Member]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenue, Remaining Performance Obligation, Amount $ 328.2    
2022 [Member]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenue, Remaining Performance Obligation, Amount 263.0    
2023 [Member]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenue, Remaining Performance Obligation, Amount 235.4    
2024 {Member}      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenue, Remaining Performance Obligation, Amount 197.9    
Thereafter [Member]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenue, Remaining Performance Obligation, Amount $ 762.0