ONEOK, Inc. is the sole general partner of ONEOK Partners, L.P. (ONEOK Partners), a master limited partnership engaged in the gathering, processing, storage and transportation of natural gas in the United States. The Company operates through three segments: Natural Gas Gathering and Processing, Natural Gas Liquids, and Natural Gas Pipelines. The Natural Gas Gathering and Processing segment provides nondiscretionary services to producers, including gathering and processing of natural gas produced from crude oil and natural gas wells. The Natural Gas Liquids segment owns and operates facilities that gather, fractionate, treat and distribute natural gas liquids (NGLs), and store NGL products, primarily in Oklahoma, Kansas, Texas, New Mexico and the Rocky Mountain region. The Natural Gas Pipelines segment owns and operates regulated natural gas transmission pipelines and natural gas storage facilities.