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ACCOUNTS AND OTHER RECEIVABLES - Allowance for Doubtful Accounts (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Allowance for Doubtful Accounts Receivable [Roll Forward]    
Balance at Beginning of Period $ 20.2  
Add: Charges 0.9 $ 0.2
Less: Net Charge-offs/ (Recoveries) (0.6)  
Balance at End of Period 21.7  
Trade accounts receivable    
Allowance for Doubtful Accounts Receivable [Roll Forward]    
Balance at Beginning of Period 5.2  
Add: Charges 0.9  
Less: Net Charge-offs/ (Recoveries) (0.6)  
Balance at End of Period 6.7  
Trade notes receivable    
Allowance for Doubtful Accounts Receivable [Roll Forward]    
Balance at Beginning of Period 0.0  
Add: Charges 0.0  
Less: Net Charge-offs/ (Recoveries) 0.0  
Balance at End of Period 0.0  
Total trade receivables    
Allowance for Doubtful Accounts Receivable [Roll Forward]    
Balance at Beginning of Period 5.2  
Add: Charges 0.9  
Less: Net Charge-offs/ (Recoveries) (0.6)  
Balance at End of Period 6.7  
Other notes receivable    
Allowance for Doubtful Accounts Receivable [Roll Forward]    
Balance at Beginning of Period 15.0  
Add: Charges 0.0  
Less: Net Charge-offs/ (Recoveries) 0.0  
Balance at End of Period $ 15.0