Common Equity (Tables)

3 Months Ended

Mar. 31, 2014

Stockholders' Equity Note [Abstract]

Common Share Activity

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

Shares outstanding, January 1, 2014	110,943,669
Equity-based compensation plans (Note 9(b))	37,049
Other	(43,536	)
Shares outstanding, March 31, 2014	110,937,182