DTE Energy (NYSE: DTE) is a Detroit-based, diversified energy company involved in the development and management of energy-re ... lated businesses and services nationwide. Built on a strong utility base, DTE Energy's largest operating subsidiaries are DTE Electric and DTE Gas. Together, these regulated utility companies provide electric and/or gas services to more than three million residential, business and industrial customers throughout Michigan. DTE Energy has more than 10,400 employees in utility and non-utility subsidiaries involved in a wide range of energy-related businesses nationwide. The company's growing non-utility businesses are built around the strengths, skills and assets of DTE Energy's electric and gas utilities. read more