Alcoa Corporation is a vertically integrated aluminum company comprised of bauxite mining, alumina refining, aluminum production (smelting and casting), and energy generation. The Company's operations are comprised of two business segments: Alumina and Aluminum. The Alumina segment primarily consists of its bauxite mines and alumina refineries, and its operations include the mining of bauxite and other aluminous ores, as well as the refining, production, and sale of smelter grade and non-metallurgical alumina. The alumina produced by this segment is sold primarily to internal and external aluminum smelter customers; a portion of the alumina is sold to external customers who process it into industrial chemical products. The Aluminum segment consists of the Company's aluminum smelting and casting operations along with the Company's energy production assets in Brazil, Canada, and the United States. It has direct and indirect ownership of over 25 operating locations across eight countries.