Alliant Energy is reliant on its business model of delivering regulated and non regulated electric and natural gas services to homes, businesses, and industries across the Midwest at the lowest costs it can support. The company's operating utilities, Interstate Power and Light (IP&L) and Wisconsin Power and Light (WPL), provide electricity to about 950,000 customers and natural gas to 410,000 customers in four states; the utility's generation division produces electricity at more than 32 power plants, with a total generating capacity of more than 6,140 MW. Non-regulated operations include rail and marine transportation services, and independent power production (including wind farms).