XML 107 R68.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Investments (Unconsolidated Equity Investments) (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2013 | Sep. 30, 2012 | Sep. 30, 2013 | Sep. 30, 2012
Schedule of Equity Method Investments [Line Items] |  |  |  |
Equity (income) loss from unconsolidated investments, net | $ (11.1) | $ (10.4) | $ (32.7) | $ (30.4)
WPL [Member] |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Equity (income) loss from unconsolidated investments, net | (11.1) | (10.5) | (32.7) | (31.2)
ATC [Member] |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Equity (income) loss from unconsolidated investments, net | (10.8) | (10.4) | (31.7) | (30.6)
ATC [Member] | WPL [Member] |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Equity (income) loss from unconsolidated investments, net | (10.8) | (10.4) | (31.7) | (30.6)
Other [Member] |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Equity (income) loss from unconsolidated investments, net | (0.3) | 0 | (1.0) | 0.2
Other [Member] | WPL [Member] |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Equity (income) loss from unconsolidated investments, net | (0.3) | (0.1) | (1.0) | (0.6)
Totals [Member] |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Equity (income) loss from unconsolidated investments, net | (11.1) | (10.4) | (32.7) | (30.4)
Totals [Member] | WPL [Member] |  |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |  |
Equity (income) loss from unconsolidated investments, net | $ (11.1) | $ (10.5) | $ (32.7) | $ (31.2)

X
- Definition This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 6 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=16385135&loc=d3e33749-111570 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 19 -Subparagraph c -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.12) -URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 + Details
Name: | us-gaap_IncomeLossFromEquityMethodInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_ScheduleOfEquityMethodInvestmentsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration