Detroit's economy may be lackluster, but DTE Energy still provides a reliable spark. The holding company's main subsidiary, DTE Electric, (formerly Detroit Edison) distributes electricity to some 2.2 million customers in southeastern Michigan. The utility's power plants (mainly fossil-fueled) have a generating capacity of more than 11,900 MW. The company's DTE Gas (formerly Michigan Consolidated Gas) unit distributes natural gas to 1.2 million customers. DTE Energy's nonregulated operations (in more than 20 states) include energy marketing and trading; coal transportation and procurement; energy management services for commercial and industrial customers; and independent and on-site power generation.