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Short-Term and Long-Term Debt (Tables)
 3 Months Ended
Mar. 31, 2014
Short-Term and Long-Term Debt [Abstract]  
First Mortgage Bonds Issuance [Table Text Block]
In December 2013, we agreed to sell $215.0 million in 2014 of ALLETE first mortgage bonds (Bonds) in the private placement market in four series as described in the following table. On March 4, 2014, we issued $100.0 million of the Bonds. We expect to issue the remaining two series on, or about, June 26, 2014, as shown below:

Issue Date (on or about)
Maturity Date
Principal Amount
Interest Rate
March 4, 2014
March 15, 2024
$60 Million
3.69%
March 4, 2014
March 15, 2044
$40 Million
4.95%
June 26, 2014
July 15, 2022
$75 Million
3.40%
June 26, 2014
July 15, 2044
$40 Million
5.05%