Investments (Tables)

9 Months Ended

Sep. 30, 2016

Investments [Abstract]

Other Investments [Table Text Block]

Other Investments	September 30, 2016		December 31, 2015
Millions
ALLETE Properties (a)		$32.9		$50.1
Available-for-sale Securities (b)	19.4		18.5
Cash Equivalents	2.0		2.0
Other	3.8		4.0
Total Other Investments		$58.1		$74.6

(a) On September 22, 2016, ALLETE Properties sold its Ormond Crossings project and Lake Swamp wetland mitigation bank for consideration of approximately $21 million. The consideration included a down payment in the form of 0.1 million shares of ALLETE common stock with a value of $8.0 million, with the remaining purchase price to be paid under the terms of a finance receivable due over a five-year period which bears interest at market rates. The finance receivable is collateralized by the property sold.

(b) As of September 30, 2016, the aggregate amount of available-for-sale corporate and governmental debt securities maturing in one year or less was $0.2 million, in one year to less than three years was $2.7 million, in three years to less than five years was $5.5 million, and in five or more years was $3.3 million.