Williams Companies is an energy infrastructure company focused on connecting North America's hydrocarbon resource plays to markets for natural gas and natural gas liquids (NGLs) through its gas pipeline and midstream business. Co.'s segments are: Transmission & Gulf of Mexico, which includes Co.'s subsidiary, Transcontinental Gas Pipe Line Company, LLC, an interstate natural gas pipeline that extends from the Gulf of Mexico to the eastern seaboard.; Northeast G&P, which includes Co.'s natural gas gathering, compression, processing, and NGL fractionation businesses; and West, which includes Co.'s interstate natural gas pipeline.