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Discontinued Operations (Tables)
3 Months Ended
Mar. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]  
Components Of Discontinued Operations In Income Statements
A summary of the components of discontinued operations in Alliant Energy’s income statements for the three months ended March 31 was as follows (in millions):
 
2014
 
2013
Operating revenues

$—

 

$0.9

Operating expenses

 
5.6

Loss before income taxes

 
(4.7
)
Income tax benefit

 
(1.7
)
Loss from discontinued operations, net of tax

$—

 

($3.0
)