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REVENUES (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Jan. 01, 2018
Contract with Customer, Asset and Liability [Abstract]      
Contract with customer, assets $ 5.0 $ 6.2 $ 6.4
Amounts invoiced in excess of revenue recognized (1.7) (0.9)  
Net additions, assets 0.5 0.7  
Contract with customer, asset, net, current 1.3 1.7 0.9
Contract with customer, asset, net, noncurrent 3.7 4.5  
Contract with customer, liabilities 57.1 31.7 33.3
Revenue recognized included in beginning balance (15.6) (19.5)  
Net additions, liabilities 41.0 17.9  
Contract with customer, liability, current 22.2 15.6 $ 19.5
Contract with customer, liability, noncurrent 34.9 $ 16.1  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenue, Remaining Performance Obligation, Amount $ 1,822.3    
Revenue, Remaining Performance Obligation, Contract Term 5 to 10 years    
2020 [Member]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenue, Remaining Performance Obligation, Amount $ 343.5    
2021 [Member]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenue, Remaining Performance Obligation, Amount 290.4    
2022 [Member]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenue, Remaining Performance Obligation, Amount 214.8    
2023 [Member]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenue, Remaining Performance Obligation, Amount 166.4    
Thereafter [Member]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenue, Remaining Performance Obligation, Amount $ 807.2    
Remaining Contract Terms [Member]      
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]      
Revenue, Remaining Performance Obligation, Contract Term one month to 24 years