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ACQUISITIONS Narrative 1 (Details) - CHS Acquisition [Member]
$ in Millions
Apr. 16, 2018
USD ($)
Business Acquisition [Line Items]  
Description of CHS Acquisition On April 16, 2018, we acquired CHS Inc.’s Council Bluffs pipeline system, comprised of a 227-mile pipeline and 18 storage tanks
Purchase price of CHS Acquisition $ 37.5