Operating primarily in Michigan, CMS Energy Corporation functions as an energy provider, structured into three principal divisions: Electric Utility, Gas Utility, and Enterprises. The Electric Utility segment manages the full spectrum of electricity services, from generating power using a varied portfolio including coal, wind, gas, renewable sources, oil, and nuclear, to its purchase, transmission, distribution, and ultimate sale. This division maintains a substantial infrastructure, featuring extensive overhead and underground distribution lines, numerous substations, and several battery facilities.