DTE Energy Company (DTE) is a diversified energy company. The Company is focused on development and management of energy-related businesses and services nationwide. Its operating units include an electric company serving approximately 2.2 million customers in Southeast Michigan and a gas company serving approximately 1.3 million customers in Michigan. The DTE portfolio includes energy businesses focused on power and industrial projects, renewable natural gas, and energy marketing and trading. The Company’s segments include Electric, which consists of DTE Electric Company, which is engaged in the generation, purchase, distribution and sale of electricity to residential, commercial and industrial customers in southeastern Michigan; and Gas, which consists of DTE Gas Company, which is engaged in the purchase, storage, transportation, distribution and sale of natural gas to residential, commercial and industrial customers throughout Michigan.