Duke Energy Corp. engages in electric power and gas distribution operations, and provides other energy related services. It operates its business through the following segments: Regulated Utilities, International Energy, and Commercial Portfolio. The Regulated Utilities segment conducts electric and gas operations primarily through Duke Energy Carolinas, Duke Energy Progress, Duke Energy Florida, Duke Energy Indiana, and the regulated transmission and distribution operations of Duke Energy Ohio. The International Energy segment principally operates and manages power generation facilities and engages in the sales and marketing of electric power, natural gas, and natural gas liquids outside the U.S. The Commercial Posrtfolio segment owns, operates and manages power plants and engages in the wholesale marketing and procurement of electric power, fuel and emission allowances related to these plants as well as other contractual positions. The company was founded on April 3, 2006 and is headquartered in Charlotte, NC.