Short-Term and Long-Term Debt Short-Term and Long-Term Debt (Tables)

3 Months Ended

Mar. 31, 2017

Debt Disclosure [Abstract]

Schedule of Short-Term and Long-Term Debt [Table Text Block]

The following tables present ALLETE’s short-term and long-term debt as of March 31, 2017 and December 31, 2016:

March 31, 2017	Principal		Unamortized Debt Issuance Costs	Total
Millions
Short-Term Debt (a)		$164.5	$(0.6)		$163.9
Long-Term Debt	1,380.2		(10.0)	1,370.2
Total Debt		$1,544.7	$(10.6)		$1,534.1

(a) Consists of long-term debt due within one year and notes payable.

December 31, 2016	Principal		Unamortized Debt Issuance Costs	Total
Millions
Short-Term Debt (a)		$188.3	$(0.6)		$187.7
Long-Term Debt	1,380.8		(10.4)	1,370.4
Total Debt		$1,569.1	$(11.0)		$1,558.1

(a) Consisted of long-term debt due within one year.