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Alcoa Corporation, formerly Alcoa Upstream Corporation, is engaged in the production of bauxite, alumina and aluminum of various cast and rolled products. The Company is engaged in the production and management of aluminum and alumina combined through its participation in various aspects of the industry, such as technology, mining, refining, smelting, and recycling. The Company's segments include Bauxite, Alumina, Aluminum, Cast Products, Energy and Rolled Products. The Company's Bauxite segment represents its global portfolio of bauxite mining assets. The Company's Alumina segment represents its refining system across the world, and processes bauxite into alumina and sells it directly to internal and external smelter customers across the world. The Company's Aluminum segment represents its smelter system across the world. Its Energy segment represents its portfolio of energy assets, with power production capacity of approximately 1,685 megawatts.