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REVENUE FROM CONTRACTS WITH CUSTOMERS: Transaction Price Allocated to the Remaining Performance Obligations (Details)
$ in Millions
Jun. 30, 2020
USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation $ 339.1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-07-01  
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]  
Revenue, remaining performance obligation $ 222.7
Revenue, remaining performance obligation, expected timing of satisfaction, period 12 months