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RISK MANAGEMENT AND HEDGING ACTIVITIES USING DERIVATIVES Part 1 (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Derivative, Fair Value [Line Items]
Derivative, Net Liability Position, Aggregate Fair Value	$ 0
Cash posted - offsetting derivative net liability positions under master-netting arrangements	197,500	$ 99,600
Derivatives designated as hedging instruments
Derivative, Fair Value [Line Items]
Assets	320,889	204,161
(Liabilities)	(582,770)	(449,264)
Natural Gas Pipelines
Derivative, Fair Value [Line Items]
Derivative, Fair Value, Net	0	0
Other Current Assets [Member] | Interest Rate Contracts | Derivatives designated as hedging instruments
Derivative, Fair Value [Line Items]
Assets	4,420	0
Other Current Liabilities [Member] | Interest Rate Contracts | Derivatives designated as hedging instruments
Derivative, Fair Value [Line Items]
(Liabilities)	(68,788)	(145,524)
Fully Netted Assets/Liabilities | Commodity Contracts | Financial contracts | Derivatives designated as hedging instruments
Derivative, Fair Value [Line Items]
Assets	316,469	204,161
(Liabilities)	$ (513,982)	$ (303,740)

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