Alliant Energy Corp. operates as a regulated investor-owned public utility holding company that engages in the provision of regulated electricity and natural gas service to natural gas customers in the Midwest through its two public utility subsidiaries. It operates its business through two segments: Utility and Non-Regulated, Parent and Other. The utility segment consists of Interstate Power and Light Co. and Wisconsin Power & Light Co. The Interstate Power & Light Co. is a public utility engaged principally in the generation and distribution of electricity and the distribution and transportation of natural gas in selective markets in Iowa and southern Minnesota. The Wisconsin Power and Light Co. is a public utility engaged principally in the generation and distribution of electricity and the distribution and transportation of natural gas in selective markets in southern and central Wisconsin. The Non-regulated, Parent and Other segment includes the operations of Resources and its sub