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DISCONTINUED OPERATIONS AND DIVESTITURES - Narrative (Details) - Discontinued Operations, Disposed of by Sale $ in Thousands, ft³ in Billions |  |  | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 22, 2020 USD ($) | Aug. 12, 2019 USD ($) | Dec. 31, 2019 USD ($) | Jun. 28, 2019 USD ($) ft³
Mega Lubricants |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations |  |  |  |
Proceeds from sale of assets | $ 22,400 |  |  |
Gain on disposition | $ 10,101 |  |  |
East Texas Pipeline |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations |  |  |  |
Proceeds from sale of assets |  | $ 17,500 |  |
Gain on disposition |  | $ 16,154 |  |
Natural Gas Storage Assets |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations |  |  |  |
Proceeds from sale of assets |  |  |  | $ 210,067
Gain on disposition |  |  | $ 178,781 |
Natural gas storage (in cubic feet) | ft³ |  |  |  | 50

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