DTE Energy Company (DTE Energy) is a diversified energy company. DTE Energy's utility operations consist primarily of DTE Electric Company (DTE Electric) and DTE Gas Company (DTE Gas). The Company's segments include Electric, Gas, Gas Storage and Pipelines, Power and Industrial Projects, Energy Trading, and Corporate and Other. The Company's Electric segment consists of DTE Electric, which is engaged in the generation, purchase, distribution and sale of electricity to approximately 2.2 million residential, commercial and industrial customers in southeastern Michigan. DTE Energy's Gas segment consists principally of DTE Gas, a natural gas utility engaged in the purchase, storage, transportation, distribution and sale of natural gas to approximately 1.2 million residential, commercial and industrial customers throughout Michigan, and the sale of storage and transportation capacity. DTE Electric owns and operates approximately 680 distribution substations.