DTE Energy Company engages in the utility operations The companys Electric segment generates purchases distributes and sells electricity to approximately 23 million residential commercial and industrial customers in southeastern Michigan It generates electricity through fossilfuel hydroelectric pumped storage and nuclear plants as well as wind and other renewable assets This segment owns and operates approximately 698 distribution substations and 449800 line transformers The companys Gas segment purchases stores transports distributes and sells natural gas to approximately 13 million residential commercial and industrial customers throughout Michigan and sells storage and transportation capacity This segment has approximately 20000 miles of distribution mains 1304000 service pipelines and 1305000 active meters as well as owns approximately 2000 miles of transmission pipelines The companys Power and Industrial Projects segment offers metallurgical coke pulverized coal and petroleum coke to the steel pulp and paper and other industries and power steam and chilled water production and wastewater treatment services as well as supplies compressed air to industrial customers Its Energy Trading segment engages in power natural gas and environmental marketing and trading structured transactions and the optimization of contracted natural gas pipeline transportation and storage positions The company was founded in 1903 and is headquartered in Detroit Michigan