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EQUITY Equity (Policies) | 6 Months Ended
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Jun. 30, 2017
Equity [Abstract] |
Incentive Distribution Policy, Managing Member or General Partner, Description [Policy Text Block] | Cash Distributions - Prior to the consummation of the Merger Transaction, we received distributions from ONEOK Partners on our common and Class B units and our 2 percent general partner interest, which included our incentive distribution rights.

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- Definition Disclosure of accounting policy for an incentive policy and the associated accounting for a plan in a limited liability corporation or limited partnership that includes the payment of cash or stock or units to the managing member or general partner. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 55 -Paragraph 103 -URI http://asc.fasb.org/extlink&oid=65015998&loc=SL5199526-159011 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 72 -URI http://asc.fasb.org/extlink&oid=6926462&loc=SL5163672-159010 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 73 -URI http://asc.fasb.org/extlink&oid=6926462&loc=SL5163674-159010 + Details
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