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Annual report pursuant to Section 13 and 15(d)

DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Schedule of Outstanding Hedge Contracts) (Details)

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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] Ìý Ìý
Derivative Instruments and Hedging Activities Disclosures [Line Items] Ìý Ìý
Derivative, Nonmonetary Notional Amount | MMBtu 20.1 1.8
Energy Related Derivative [Member] Ìý Ìý
Derivative Instruments and Hedging Activities Disclosures [Line Items] Ìý Ìý
Derivative, Nonmonetary Notional Amount | gal 0.8 11.0