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Operations and Significant Accounting Policies (Tables) | 9 Months Ended
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Sep. 30, 2014
Operations and Significant Accounting Policies [Abstract] |
Inventories [Table Text Block] |
Inventories | September 30, 2014 |  |  | December 31, 2013 |
Millions |  |  |
Fuel |  | $16.8 |  |  |  | $13.1 |
Materials and Supplies | 54.8 |  |  | 46.2 |
Total Inventories |  | $71.6 |  |  |  | $59.3 |
Prepayments and Other Current Assets [Table Text Block] |
Prepayments and Other Current Assets | September 30, 2014 |  |  | December 31, 2013 |
Millions |  |  |
Deferred Fuel Adjustment Clause |  | $18.5 |  |  |  | $23.0 |
Restricted Cash (a) | 2.4 |  |  | — |
Other | 8.4 |  |  | 12.1 |
Total Prepayments and Other Current Assets |  | $29.3 |  |  |  | $35.1 |
(a) | Restricted Cash related to ALLETE Clean Energy’s wind energy facilities operating expense and capital distribution reserve requirements.
Other Current and Non-Current Liabilities [Table Text Block] |
Other Current Liabilities | September 30, 2014 |  |  | December 31, 2013 |
Millions |  |  |
Customer Deposits |  | $21.2 |  |  |  | $26.0 |
Power Purchase Agreements (a) | 12.3 |  |  | — |
Other | 26.9 |  |  | 26.6 |
Total Other Current Liabilities |  | $60.4 |  |  |  | $52.6 |
(a) | Power Purchase Agreements were acquired in conjunction with the ALLETE Clean Energy wind energy facilities acquisition on January 30, 2014. (See Note 4. Acquisition.)
NOTE 1. OPERATIONS AND SIGNIFICANT ACCOUNTING POLICIES (Continued)
Other Non-Current Liabilities | September 30, 2014 |  |  | December 31, 2013 |
Millions |  |  |
Asset Retirement Obligation |  | $94.6 |  |  |  | $81.8 |
Power Purchase Agreements (a) | 90.5 |  |  | — |
Other | 46.5 |  |  | 45.4 |
Total Other Non-Current Liabilities |  | $231.6 |  |  |  | $127.2 |
(a) | Power Purchase Agreements were acquired in conjunction with the ALLETE Clean Energy wind energy facilities acquisition on January 30, 2014. (See Note 4. Acquisition.)
Supplemental Statement of Cash Flows Information [Table Text Block] | Supplemental Statement of Cash Flows Information.
For the Nine Months Ended September 30, | 2014 |  |  | 2013 |
Millions |  |  |
Cash Paid During the Period for Interest – Net of Amounts Capitalized |  | $39.4 |  |  |  | $36.0 |
Cash Paid During the Period for Income Taxes |  | $2.8 |  |  |  | $0.6 |
Noncash Investing and Financing Activities |  |  |  |  |
Decrease in Accounts Payable for Capital Additions to Property, Plant and Equipment | $(6.5) |  | $(10.0)
Capitalized Asset Retirement Costs |  | $0.6 |  |  |  | $1.9 |
AFUDC – Equity |  | $5.9 |  |  |  | $3.4 |
ALLETE Common Stock Contributed to the Pension Plan |  | $19.5 |  |  | — |

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