Investments (Tables)

12 Months Ended

Dec. 31, 2012

Investments [Abstract]

Investments and ALLETE Properties [Table Text Block]

Investments
As of December 31	2012		2011
Millions
ALLETE Properties		$91.1		$91.3
Available-for-sale Securities	26.8		24.7
Other	25.6		16.3
Total Investments		$143.5		$132.3

NOTE 7. INVESTMENTS (Continued)

ALLETE Properties
As of December 31	2012			2011
Millions
Land Inventory Beginning Balance		$86.0			$86.0
Deeds to Collateralized Property	0.5			1.8
Land Impairment	—			(1.7		)
Cost of Sales	(0.2		)	(0.3		)
Capitalized Improvements and Other	0.2			0.2
Land Inventory Ending Balance	86.5			86.0
Long-Term Finance Receivables (net of allowances of $0.6 and $0.6)	1.4			2.0
Other	3.2			3.3
Total Real Estate Assets		$91.1			$91.3

Available-for-sale Securities [Table Text Block]

Available-For-Sale Securities
Millions		Gross Unrealized
As of December 31	Cost	Gain	(Loss)	Fair Value
2012	$27.4	$0.5	$(1.1)	$26.8
2011	$27.3	$0.1	$(2.7)	$24.7
2010	$27.4	$0.2	$(2.4)	$25.2

Available-for-sale Securities [Table Text Block]

	Net	Gross Realized		Net Unrealized Gain (Loss) in Other
Year Ended December 31	Proceeds	Gain	(Loss)	Comprehensive Income
2012	$1.5	—	—	$1.2
2011	$7.8	—	—	$(0.3)
2010	$0.6	—	—	$0.8