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Earnings Per Share and Common Stock (Tables) | 6 Months Ended
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Jun. 30, 2011
Earnings Per Share and Common Stock [Abstract] |
Earnings Per Share and Common Stock |
|  | 2011 |  |  |  | 2010 |
Reconciliation of Basic and Diluted |  | Dilutive |  |  |  | Dilutive |
Earnings Per Share | Basic | Securities | Diluted |  | Basic | Securities | Diluted
Millions Except Per Share Amounts |  |  |  |  |  |  |
For the Quarter Ended June 30, |  |  |  |  |  |  |
Net Income Attributable to ALLETE | $17.0 |  | $17.0 |  | $19.4 |  | $19.4
Common Shares | 35.0 | 0.1 | 35.1 |  | 34.1 | 0.1 | 34.2
Earnings Per Share | $0.49 |  | $0.48 |  | $0.57 |  | $0.57
For the Six Months Ended June 30, |  |  |  |  |  |  |
Net Income Attributable to ALLETE | $54.2 |  | $54.2 |  | $42.4 |  | $42.4
Common Shares | 34.8 | 0.1 | 34.9 |  | 34.0 | 0.1 | 34.1
Earnings Per Share | $1.56 |  | $1.55 |  | $1.25 |  | $1.25

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- Definition Tabular disclosure of the reconciliation of basic net earnings per share (or unit) to diluted earnings per share (or unit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 260 -SubTopic 10 -Publisher FASB -Number -Article -Subparagraph -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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