Investments (Tables)

3 Months Ended

Mar. 31, 2015

Investments [Abstract]

Other Investments and ALLETE Properties [Table Text Block]

Other Investments	March 31, 2015		December 31, 2014
Millions
ALLETE Properties		$88.3		$88.2
Available-for-sale Securities (a)	19.3		18.9
Cash Equivalents	2.8		2.9
Other	4.3		4.4
Total Other Investments		$114.7		$114.4

(a) As of March 31, 2015, the aggregate amount of available-for-sale corporate debt securities maturing in one year or less was $0.4 million, in one year to less than three years was $1.7 million, in three years to less than five years was $3.0 million, and in five or more years was $5.9 million.

NOTE 3.  INVESTMENTS (Continued)

ALLETE Properties	March 31, 2015		December 31, 2014
Millions
Land Inventory Beginning Balance		$83.8		$85.4
Cost of Sales	—		(2.2		)
Other	0.1		0.6
Land Inventory Ending Balance	83.9		83.8
Long-Term Finance Receivables (net of allowances of $0.6 and $0.6)	1.2		1.2
Other	3.2		3.2
Total Real Estate Assets		$88.3		$88.2

Available-for-sale Securities [Table Text Block]

Available-For-Sale Securities
Millions		Gross Unrealized
	Cost	Gain	Loss	Fair Value
March 31, 2015	$19.8	$0.3	$0.8	$19.3
December 31, 2014	$19.6	$0.2	$0.9	$18.9