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Discontinued Operations and Assets and Liabilities Held For Sale (Tables)
 12 Months Ended
Dec. 31, 2013
Discontinued Operations and Disposal Groups [Abstract]  
Components Of Discontinued Operations In Consolidated Statements Of Income
A summary of the components of discontinued operations in Alliant Energy’s Consolidated Statements of Income was as follows (in millions):
 
2013
 
2012
 
2011
Operating revenues

$0.9

 

$289.2

 

$445.0

Operating expenses
9.9

 
297.0

 
476.9

Interest expense and other
—

 
0.7

 
—

Loss before income taxes
(9.0
)
 
(8.5
)
 
(31.9
)
Income tax benefit
(3.1
)
 
(3.4
)
 
(12.4
)
Loss from discontinued operations, net of tax

($5.9
)
 

($5.1
)
 

($19.5
)
Assets and Liabilities Held For Sale on Consolidated Balance Sheets
As of December 31, 2012, Alliant Energy’s Consolidated Balance Sheet included assets held for sale recorded in “Other current assets” and liabilities held for sale recorded in “Other current liabilities” as follows (in millions):
Current assets

$27.9

Current liabilities
31.4

Net liabilities held for sale

($3.5
)