Earnings Per Share and Common Stock (Tables)

6 Months Ended

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