Common Equity (Tables)

9 Months Ended

Sep. 30, 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 10(b))	35,547
Other	(43,536	)
Shares outstanding, September 30, 2014	110,935,680