Imperial Oil Limited explores for, produces, and sells crude oil and natural gas in Canada. The company operates through three segments: Upstream, Downstream, and Chemical. The Upstream segment explores for and produces crude oil, natural gas, synthetic oil, and bitumen. As of December 31, 2014, the Upstream segment had 1,704 million oil-equivalent barrels of proved undeveloped reserves. The Downstream segment is involved in the transportation and refining of crude oil, as well as blending, distribution, and marketing of refined products. This segment also maintains a distribution system, including 22 primary terminals to handle bulk and packaged petroleum products moving from refineries to market by pipeline, tanker, rail, and road transport; and owns and operates natural gas liquids and products pipelines in Alberta, Manitoba, and Ontario, as well as holds interests in crude oil and products pipeline companies. In addition, this segment sells petroleum products under the Esso and Mobil brand to motoring public through approximately 1,700 Esso retail service stations of which approximately 470 are company owned or leased; and approximately 1,200 Esso branded service stations, which provides customer services. The Chemical segment manufactures and markets various petrochemicals, including ethylene, benzene, aromatic and aliphatic solvents, plasticizer intermediates, and polyethylene resins. Imperial Oil Limited also serves agriculture, residential heating, and commercial markets through 27 branded resellers, as well as sells petroleum products to large industrial and transportation customers, independent marketers, resellers, and other refiners. The company was founded in 1880 and is headquartered in Calgary, Canada. Imperial Oil Limited operates as a subsidiary of Exxon Mobil Corporation.