Chevron Corporation, through its subsidiaries, engages in petroleum, chemicals, mining, power generation, and energy operations worldwide. It operates in two segments, Upstream and Downstream. The Upstream segment is involved in the exploration, development, and production of crude oil and natural gas; liquefaction, transportation, and regasification associated with liquefied natural gas; transportation of crude oil through pipelines; and processing, transportation, storage, and marketing of natural gas, as well as holds an interest in a gas-to-liquids project. The Downstream segment engages in refining crude oil into petroleum products; marketing crude oil and refined products primarily under the Chevron, Texaco, and Caltex names; transporting crude oil and refined products by pipeline, marine vessel, motor equipment, and rail car; and manufacturing and marketing commodity petrochemicals, plastics for industrial uses, and additives for fuel and lubricant additives. The company is also involved in coal and molybdenum mining operations; cash management and debt financing activities; insurance operations; real estate activities; and energy services, and alternative fuels and technology businesses, as well as manages interests in 13 power assets with a total operating capacity of approximately 3,100 megawatts. The company was formerly known as ChevronTexaco Corporation and changed its name to Chevron Corporation in 2005. Chevron Corporation was founded in 1879 and is headquartered in San Ramon, California.