Endesa, S.A. (Spanish pronunciation: [enˈdesa], originally an initialism for Empresa Nacional de Electricidad, S.A.) is the largest electric utility company in Spain. The firm, a majority-owned subsidiary of the Italian utility company Enel, has 10 million customers in Spain, with domestic annual generation of over 97,600 GWh from nuclear, fossil-fueled, hydroelectric, and renewable resource power plants. Internationally, it serves another 10 million customers and provides over 80,100 GWh annually. Total customers numbered 22.2 million as of December 31, 2004. It also markets energy in Europe.