Investments (Tables)

3 Months Ended

Mar. 31, 2013

Investments [Abstract]

Other Investments and ALLETE Properties [Table Text Block]

Other Investments	March 31, 2013		December 31, 2012
Millions
ALLETE Properties		$91.1		$91.1
Available-for-sale Securities	20.1		26.8
Cash Equivalents	22.7		20.7
Other	4.7		4.9
Total Other Investments		$138.6		$143.5

ALLETE Properties	March 31, 2013		December 31, 2012
Millions
Land Inventory Beginning Balance		$86.5		$86.0
Deeds to Collateralized Property	—		0.5
Cost of Sales	—		(0.2		)
Capitalized Improvements and Other	0.1		0.2
Land Inventory Ending Balance	86.6		86.5
Long-Term Finance Receivables (net of allowances of $0.6 and $0.6)	1.4		1.4
Other	3.1		3.2
Total Real Estate Assets		$91.1		$91.1