Duke Energy Corporation, together with its subsidiaries, operates as an energy company in the United States and Latin America. The company operates in three segments: U.S. Franchised Electric and Gas, Commercial Power, and International Energy. The U.S. Franchised Electric and Gas segment generates, transmits, distributes and sells electricity in central and western North Carolina, western South Carolina, central, southwestern Ohio, north central and southern Indiana, and northern Kentucky; and transports and sells natural gas. This segment supplies electric service to 4 million residential, general service, and industrial customers; and provides regulated transmission and distribution services for natural gas to 500,000 customers in southwestern Ohio and northern Kentucky, as well as sells electricity on wholesale to incorporated municipalities, electric cooperative utilities, and other load serving entities. It generates electricity through nuclear, coal-fired, hydroelectric, combustion turbine, and combine cycle stations. The Commercial Power segment owns, operates, and manages power plants, as well as engages in the wholesale marketing and procurement of electric power, fuel, and emission allowances related to plants. This segment also retails electricity to customers in southwest, west central, and northern Ohio. The International Energy segment operates and manages power generation facilities; and sells and markets electric power, natural gas, and natural gas liquids. It serves retail distributors, electric utilities, independent power producers, marketers, and industrial/commercial companies. The company was founded in 1916 and is headquartered in Charlotte, North Carolina.