DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Schedule of Outstanding Hedge Contracts) (Details) - Designated as Hedging Instrument [Member] gal in Millions, MMBtu in Millions	Dec. 31, 2019 gal MMBtu	Dec. 31, 2018 gal MMBtu
Natural Gas [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Nonmonetary Notional Amount | MMBtu	20.1	1.8
Energy Related Derivative [Member]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, Nonmonetary Notional Amount | gal	0.8	11.0