CenterPoint Energy Inc. is a domestic energy delivery company that provides electric transmission & distribution, natural gas distribution and competitive natural gas sales and services operations. The company maintains the wires, poles and electric infrastructure serving customers in the greater Houston area and in southwestern Indiana. CenterPoint Energy also owns and operates electric generation capacity in Indiana. Its important subsidiaries include Houston Electric, CERC Corp. and Vectren. CenterPoint Energy's reportable business segments include the following: Electric (this segment offers electric transmission and distribution services in Houston and Indiana), Natural Gas (this segment offers intrastate natural gas sales and natural gas transportation and distribution for the residential, commercial, industrial and institutional customers).