CONCENTRATIONS OF CREDIT RISK (Details) $ in Millions |
Sep. 30, 2016
USD ($)
counterparty
|
---|---|
Concentration Risk [Line Items] | |
Number of large counterparties for which credit risk is disclosed | counterparty | 5 |
Energy Producers And Their Affiliates | |
Concentration Risk [Line Items] | |
Accounts receivable | $ 15.8 |
Net receivable amount | 12.4 |
Utility Companies And Their Affiliates | |
Concentration Risk [Line Items] | |
Accounts receivable | 52.8 |
Net receivable amount | 50.5 |
Largest Counterparties | |
Concentration Risk [Line Items] | |
Accounts receivable | 31.2 |
Net receivable amount | $ 27.2 |