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Earnings Per Share and Common Stock (Tables)

9 Months Ended

Sep. 30, 2014

Earnings Per Share and Common Stock [Abstract]

Reconciliation of Basic and Diluted Earnings Per Share [Table Text Block]

					2014											2013
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 September 30,
Net Income Attributable to ALLETE		$41.6							$41.6				$25.2							$25.2
Average Common Shares	42.9				—			42.9				39.8				0.1			39.9
Earnings Per Share		$0.97							$0.97				$0.63							$0.63
For the Nine Months Ended September 30,
Net Income Attributable to ALLETE		$91.9							$91.9				$71.7							$71.7
Average Common Shares	42.1				0.2			42.3				39.4				0.1			39.5
Earnings Per Share		$2.18							$2.17				$1.82							$1.81

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- Definition

Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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