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ACCOUNTING POLICIES AND PRONOUNCEMENTS (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Financing Receivable, Allowance for Credit Losses [Line Items]    
Financing receivable threshold period past due 30 days  
MUD receivables    
Financing Receivable, Allowance for Credit Losses [Line Items]    
Financing receivable, accrued interest, after allowance for credit loss $ 15.7 $ 17.3