DTE Energy Co. operates as a diversified energy company, which engages in the provision of electricity and natural gas sales, distribution and storage services. It operates through the following segments: Electric, Gas, Non-Utility Operations, and Corporate & Other. The Electric segment engages in the generation, purchase, distribution and sale of electricity to residential, commercial and industrial customers in south-eastern Michigan. The Gas segment engages in the purchase, storage, transportation, distribution and sale of natural gas to residential, commercial and industrial customers throughout Michigan and the sale of storage and transportation capacity. The Non-Utility Operations segment engages in gas storage and pipelines, power and industrial projects, and energy trading. The Corporate & Other includes various holding company activities, holds certain non-utility debt, and holds energy-related investments. The company was founded in January 1995 and is headquartered in Detroit, MI.