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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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