Williams Partners L.P. focuses on natural gas transportation; gathering, treating, and processing; storage; natural gas liquid (NGL) fractionation, and oil transportation. As of December 31, 2011, The Williams Companies, Inc. (Williams) owned 70% limited partnership interest in the Company and all of its 2% general partner interest. Williams is an energy infrastructure company. The Company operates in two segments: Gas Pipeline, and Midstream Gas & Liquids. Its Gas Pipeline segment includes its interstate natural gas pipelines and pipeline joint venture investments. Its Midstream Gas & Liquids segment includes its natural gas gathering, treating and processing business and consists of wholly owned and partially owned subsidiaries. In March 2014, the Company acquired The Williams Companies, Inc. in-service Alberta, Canada operations.