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Discontinued Operations And Assets And Liabilities Held for Sale (Tables) | 6 Months Ended
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Jun. 30, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
Discontinued Operations on Income Statement | A summary of the components of discontinued operations in Alliant Energy’s income statements for the three and six months ended June 30 was as follows (in millions):
| Three Months |  | Six Months
| 2015 |  | 2014 |  | 2015 |  | 2014
Operating expenses |  | $2.0 |  |  |  | $0.6 |  |  |  | $2.0 |  |  |  | $0.6 |
Loss before income taxes | (2.0 | ) |  | (0.6 | ) |  | (2.0 | ) |  | (0.6 | )
Income tax benefit | (0.7 | ) |  | (0.3 | ) |  | (0.7 | ) |  | (0.3 | )
Loss from discontinued operations, net of tax |  | ($1.3 | ) |  |  | ($0.3 | ) |  |  | ($1.3 | ) |  |  | ($0.3 | )
Assets And Liabilities Held For Sale on Balance Sheets | Alliant Energy’s and IPL’s balance sheets included assets held for sale recorded in “Other current assets” and liabilities held for sale recorded in “Other current liabilities” as follows (in millions):
| Electric |  | Natural Gas
| Distribution Assets |  | Distribution Assets
| June 30, 2015 |  | December 31, 2014
Assets held for sale: |  |  |
Current assets |  | $9.3 |  |  |  | $1.1 |
Property, plant and equipment, net | 125.0 |  |  | 11.0 |
Non-current regulatory assets | 20.5 |  |  | 7.0 |
Carrying value adjustment of net assets sold (a) | (8.8 | ) |  | — |
Total assets held for sale | 146.0 |  |  | 19.1 |
Liabilities held for sale: |  |  |
Current liabilities | 2.4 |  |  | 1.0 |
Other liabilities | 12.6 |  |  | 7.1 |
Total liabilities held for sale | 15.0 |  |  | 8.1 |
Net assets held for sale |  | $131.0 |  |  |  | $11.0 |
(a) | The carrying value of IPL’s Minnesota electric distribution assets classified as held for sale exceeded the expected proceeds, less costs to sell. As a result, Alliant Energy and IPL recorded a pre-tax charge of $9 million in the second quarter of 2015 related to the Minnesota electric distribution assets.
IPL [Member] |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |
Assets And Liabilities Held For Sale on Balance Sheets | Alliant Energy’s and IPL’s balance sheets included assets held for sale recorded in “Other current assets” and liabilities held for sale recorded in “Other current liabilities” as follows (in millions):
| Electric |  | Natural Gas
| Distribution Assets |  | Distribution Assets
| June 30, 2015 |  | December 31, 2014
Assets held for sale: |  |  |
Current assets |  | $9.3 |  |  |  | $1.1 |
Property, plant and equipment, net | 125.0 |  |  | 11.0 |
Non-current regulatory assets | 20.5 |  |  | 7.0 |
Carrying value adjustment of net assets sold (a) | (8.8 | ) |  | — |
Total assets held for sale | 146.0 |  |  | 19.1 |
Liabilities held for sale: |  |  |
Current liabilities | 2.4 |  |  | 1.0 |
Other liabilities | 12.6 |  |  | 7.1 |
Total liabilities held for sale | 15.0 |  |  | 8.1 |
Net assets held for sale |  | $131.0 |  |  |  | $11.0 |
(a) | The carrying value of IPL’s Minnesota electric distribution assets classified as held for sale exceeded the expected proceeds, less costs to sell. As a result, Alliant Energy and IPL recorded a pre-tax charge of $9 million in the second quarter of 2015 related to the Minnesota electric distribution assets.

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- Definition Tabular disclosure of disposal groups, which may include the gain (loss) recognized in the income statement and the income statement caption that includes that gain (loss), amounts of revenues and pretax profit or loss reported in discontinued operations, the classification and carrying value of the assets and liabilities comprising the disposal group, and the segment in which the disposal group was reported. Also may include the amount of adjustments to amounts previously reported in discontinued operations such as resolution of contingencies arising from the disposal transaction or the operations of the component prior to disposal. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1510-107760 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6892542&loc=d3e957-107759 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=8077374&loc=d3e2443-110228 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1474-107760 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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