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Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2014
Subsequent Events [Abstract]
Subsequent Events	12. Subsequent Events On October 23, 2014, the board of directors of the General Partner declared a cash distribution to the Partnership’s unitholders of $0.615 per unit, together with the corresponding distributions to the Class B unitholders and the General Partner. The cash distributions will be paid on November 14, 2014, to unitholders of record at the close of business on November 7, 2014, and to the General Partner. On October 26, 2014, the Partnership, Williams and Williams Partners announced that the Partnership and Williams Partners have entered into a merger agreement. Please read Note 1 (Description of Business and Basis of Presentation) to the condensed consolidated financial statements for information regarding the merger agreement.