SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) number in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020 USD ($)	Mar. 31, 2019 USD ($)	Jan. 01, 2019 USD ($)
Significant Accounting Policies [Line Items]
Document Period End Date	Mar. 31, 2020
Number of natural gas distribution services customers	2.2
Segment Reporting, Disclosure of Major Customers	0	0
Capital Expenditures Incurred but Not yet Paid	$ 4.2	$ 1.7
Operating Lease, Right-of-Use Asset			$ 32.0
Operating Lease, Liability			$ 32.0