PG&E Corporation is a holding company. The Company's primary operating subsidiary is Pacific Gas and Electric Company (the Utility), which operates in northern and central California. The Utility is engaged in the sale and delivery of electricity and natural gas to customers. The Utility generates electricity and provides electricity transmission and distribution services throughout its service territory in northern and central California to residential, commercial, industrial, and agricultural customers. The Utility provides bundled services (electricity, transmission and distribution services) to various customers in its service territory. The Utility owns approximately 18,000 circuit miles of interconnected transmission lines operating at voltages ranging from 60 kilovolt (kV) to 500 kV. It also operates 35 electric transmission substations with a capacity of approximately 66,000 megavolt ampere (MVA).