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Business Segments | 9 Months Ended
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Sep. 30, 2014
Business Segments [Abstract] |
Business Segments [Text Block] | BUSINESS SEGMENTS Regulated Operations includes our regulated utilities, Minnesota Power and SWL&P, as well as our investment in ATC, a Wisconsin-based regulated utility that owns and maintains electric transmission assets in parts of Wisconsin, Michigan, Minnesota and Illinois. Investments and Other is comprised primarily of BNI Coal, our coal mining operations in North Dakota, ALLETE Clean Energy, our business which acquired three wind energy facilities in January 2014, and is aimed at developing or acquiring capital projects that create energy solutions via wind, solar, biomass, midstream gas and oil infrastructure, among other energy-related projects, and ALLETE Properties, our Florida real estate investment. Investments and Other also includes other business development and corporate expenditures, unallocated interest expense, a small amount of non-rate base generation, approximately 5,000 acres of land in Minnesota, and earnings on cash and investments.
| Consolidated |  | Regulated Operations |  | Investments and Other |
Millions |  |  |
For the Quarter Ended September 30, 2014 |  |  |
Operating Revenue |  | $288.9 |  |  | $255.8 |  |  | $33.1 |
Fuel and Purchased Power Expense | 88.9 |  | 88.9 |  | — |
Operating and Maintenance Expense | 105.7 |  | 79.4 |  | 26.3 |
Depreciation Expense | 33.5 |  | 28.5 |  | 5.0 |
Operating Income | 60.8 |  | 59.0 |  | 1.8 |
Interest Expense | (13.2 | ) | (11.8 | ) | (1.4 | )
Equity Earnings in ATC | 5.3 |  | 5.3 |  | — |
Other Income | 2.1 |  | 2.1 |  | — |
Income Before Non-Controlling Interest and Income Taxes | 55.0 |  | 54.6 |  | 0.4 |
Income Tax Expense | 13.4 |  | 13.4 |  | — |
Net Income | 41.6 |  | 41.2 |  | 0.4 |
Less: Non-Controlling Interest in Subsidiaries | — |  | — |  | — |
Net Income Attributable to ALLETE |  | $41.6 |  |  | $41.2 |  |  | $0.4 |
NOTE 2. BUSINESS SEGMENTS (Continued)
| Consolidated |  | Regulated Operations |  | Investments and Other |
Millions |  |  |
For the Quarter Ended September 30, 2013 |  |  |
Operating Revenue |  | $251.0 |  |  | $226.4 |  |  | $24.6 |
Fuel and Purchased Power Expense | 80.5 |  | 80.5 |  | — |
Operating and Maintenance Expense | 102.7 |  | 78.6 |  | 24.1 |
Depreciation Expense | 29.4 |  | 27.9 |  | 1.5 |
Operating Income (Loss) | 38.4 |  | 39.4 |  | (1.0 | )
Interest Expense | (12.7 | ) | (10.4 | ) | (2.3 | )
Equity Earnings in ATC | 4.9 |  | 4.9 |  | — |
Other Income | 3.3 |  | 1.2 |  | 2.1 |
Income (Loss) Before Non-Controlling Interest and Income Taxes | 33.9 |  | 35.1 |  | (1.2 | )
Income Tax Expense (Benefit) | 8.7 |  | 10.5 |  | (1.8 | )
Net Income | 25.2 |  | 24.6 |  | 0.6 |
Less: Non-Controlling Interest in Subsidiaries | — |  | — |  | — |
Net Income Attributable to ALLETE |  | $25.2 |  |  | $24.6 |  |  | $0.6 |
| Consolidated |  | Regulated Operations |  | Investments and Other |
Millions |  |  |
For the Nine Months Ended September 30, 2014 |  |  |
Operating Revenue |  | $846.1 |  |  | $749.6 |  |  | $96.5 |
Fuel and Purchased Power Expense | 268.7 |  | 268.7 |  | — |
Operating and Maintenance Expense | 340.6 |  | 258.6 |  | 82.0 |
Depreciation Expense | 99.5 |  | 86.9 |  | 12.6 |
Operating Income | 137.3 |  | 135.4 |  | 1.9 |
Interest Expense | (39.5 | ) | (34.7 | ) | (4.8 | )
Equity Earnings in ATC | 15.6 |  | 15.6 |  | — |
Other Income | 6.0 |  | 5.9 |  | 0.1 |
Income (Loss) Before Non-Controlling Interest and Income Taxes | 119.4 |  | 122.2 |  | (2.8 | )
Income Tax Expense (Benefit) | 27.1 |  | 29.6 |  | (2.5 | )
Net Income (Loss) | 92.3 |  | 92.6 |  | (0.3 | )
Less: Non-Controlling Interest in Subsidiaries | 0.4 |  | — |  | 0.4 |
Net Income (Loss) Attributable to ALLETE |  | $91.9 |  |  | $92.6 |  | $(0.7)
As of September 30, 2014 |  |  |
Total Assets |  | $4,067.9 |  |  | $3,519.9 |  |  | $548.0 |
Property, Plant and Equipment – Net |  | $3,121.5 |  |  | $2,888.5 |  |  | $233.0 |
Accumulated Depreciation |  | $1,316.6 |  |  | $1,244.7 |  |  | $71.9 |
Capital Additions |  | $467.6 |  |  | $452.9 |  |  | $14.7 |
NOTE 2. BUSINESS SEGMENTS (Continued)
| Consolidated |  | Regulated Operations |  | Investments and Other |
Millions |  |  |
For the Nine Months Ended September 30, 2013 |  |  |
Operating Revenue |  | $750.4 |  |  | $683.6 |  |  | $66.8 |
Fuel and Purchased Power Expense | 245.7 |  | 245.7 |  | — |
Operating and Maintenance Expense | 311.2 |  | 243.6 |  | 67.6 |
Depreciation Expense | 86.3 |  | 81.8 |  | 4.5 |
Operating Income (Loss) | 107.2 |  | 112.5 |  | (5.3 | )
Interest Expense | (37.8 | ) | (31.5 | ) | (6.3 | )
Equity Earnings in ATC | 15.1 |  | 15.1 |  | — |
Other Income | 7.5 |  | 3.4 |  | 4.1 |
Income (Loss) Before Non-Controlling Interest and Income Taxes | 92.0 |  | 99.5 |  | (7.5 | )
Income Tax Expense (Benefit) | 20.3 |  | 26.5 |  | (6.2 | )
Net Income (Loss) | 71.7 |  | 73.0 |  | (1.3 | )
Less: Non-Controlling Interest in Subsidiaries | — |  | — |  | — |
Net Income (Loss) Attributable to ALLETE |  | $71.7 |  |  | $73.0 |  | $(1.3)
As of September 30, 2013 |  |  |  |  |  |
Total Assets |  | $3,463.9 |  |  | $3,086.3 |  |  | $377.6 |
Property, Plant and Equipment – Net |  | $2,456.1 |  |  | $2,384.1 |  |  | $72.0 |
Accumulated Depreciation |  | $1,225.3 |  |  | $1,165.8 |  |  | $59.5 |
Capital Additions |  | $186.4 |  |  | $177.6 |  |  | $8.8 |

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