Iberdrola, S.A., through its subsidiaries, engages in the generation, transmission, distribution, sale, and retail of electricity in Spain, Portugal, the United Kingdom, North America, the United States, Brazil, and internationally. It operates through Network Business, Deregulated Business, Renewable Business, and Other Businesses segments. The company generates electricity through hydroelectric, nuclear, coal, gas combined cycle, and cogeneration facilities, and electricity from onshore and offshore wind, mini-hydro, solar thermal, photovoltaic, biomass, etc. It also stores, trades in, and retails natural gas. In addition, the company provides engineering and construction services for power generation facilities and sells and rents housing, offices, and commercials.