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Discontinued Operations and Assets and Liabilities Held For Sale
 12 Months Ended
Dec. 31, 2013
Discontinued Operations and Disposal Groups [Abstract]  
Discontinued Operations
DISCONTINUED OPERATIONS AND ASSETS AND LIABILITIES HELD FOR SALE
In 2011, Alliant Energy sold its IEA business and RMT’s environmental business unit to narrow its strategic focus and risk profile and received aggregate net proceeds of $17 million for these businesses. In 2013, Alliant Energy sold the remainder of its RMT business to further narrow its strategic focus and risk profile. Alliant Energy did not recognize any material gains or losses related to the sales of these businesses. Alliant Energy does not currently believe that adjustments to the gain or loss related to the sale of the remainder of RMT in periods after December 31, 2013 will be material.

The operating results of RMT and IEA have been separately classified and reported as discontinued operations in Alliant Energy’s 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
)

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
)