Discontinued Operations and Assets and Liabilities Held For Sale (Tables)

12 Months Ended

Dec. 31, 2015

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Components Of Discontinued Operations In Consolidated Statements Of Income

A summary of the components of discontinued operations in Alliant Energy’s income statements was as follows (in millions):

	2015			2014			2013
Operating revenues		$—			$—			$0.9
Operating expenses	4.0			3.7			9.9
Loss before income taxes	(4.0		)	(3.7		)	(9.0		)
Income tax benefit	(1.5		)	(1.3		)	(3.1		)
Loss from discontinued operations, net of tax		($2.5	)		($2.4	)		($5.9	)

Assets and Liabilities Held For Sale on Consolidated Balance Sheets

As of December 31, 2014, Alliant Energy’s and IPL’s balance sheets included assets held for sale related to IPL’s Minnesota natural gas distribution assets recorded in “Other current assets” and liabilities held for sale recorded in “Other current liabilities” as follows (in millions):

Assets held for sale:
Current assets		$1.1
Property, plant and equipment, net	11.0
Non-current regulatory assets	7.0
Total assets held for sale	19.1
Liabilities held for sale:
Current liabilities	1.0
Other liabilities	7.1
Total liabilities held for sale	8.1
Net assets held for sale		$11.0

IPL [Member]

Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]

Assets and Liabilities Held For Sale on Consolidated Balance Sheets

As of December 31, 2014, Alliant Energy’s and IPL’s balance sheets included assets held for sale related to IPL’s Minnesota natural gas distribution assets recorded in “Other current assets” and liabilities held for sale recorded in “Other current liabilities” as follows (in millions):

Assets held for sale:
Current assets		$1.1
Property, plant and equipment, net	11.0
Non-current regulatory assets	7.0
Total assets held for sale	19.1
Liabilities held for sale:
Current liabilities	1.0
Other liabilities	7.1
Total liabilities held for sale	8.1
Net assets held for sale		$11.0