The Williams Companies, Inc. is an energy infrastructure company. The Company is focused on connecting North America's hydrocarbon resource plays to markets for natural gas, natural gas liquids (NGL), and olefins. As of December 31, 2016, its interstate gas pipelines, midstream and olefins production interests were held through its investment in Williams Partners L.P. (WPZ). The Company's segments include Williams Partners, Williams NGL & Petchem Services and Other. The Williams Partners segment includes its consolidated master limited partnership, WPZ. The gas pipeline business includes interstate natural gas pipelines and pipeline joint project investments. The midstream business provides natural gas gathering, treating, processing and compression services. The Williams NGL & Petchem Services segment includes its Texas Belle pipeline and certain other domestic olefins pipeline assets. Other segment includes its corporate operations and Canadian construction services company.