Common Equity (Tables)

3 Months Ended

Mar. 31, 2017

Stockholders' Equity Note [Abstract]

Common Share Activity

A summary of Alliant Energy’s common stock activity was as follows:

Shares outstanding, January 1, 2017	227,673,654
Shareowner Direct Plan issuances	190,286
Equity-based compensation plans (Note 9(b))	5,185
Other	(45,847	)
Shares outstanding, March 31, 2017	227,823,278