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Business Segments (Tables) | 6 Months Ended
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Jun. 30, 2015
Business Segments [Abstract] |
Business Segments [Table Text Block] |
| Consolidated |  | Regulated Operations |  | Investments and Other |
Millions |  |  |
Quarter Ended June 30, 2015 |  |  |
Operating Revenue |  | $323.3 |  |  | $230.0 |  |  | $93.3 |
Fuel and Purchased Power | 80.1 |  | 80.1 |  | — |
Transmission Services | 11.3 |  | 11.3 |  | — |
Cost of Sales | 52.3 |  | 1.0 |  | 51.3 |
Operating and Maintenance | 85.4 |  | 57.8 |  | 27.6 |
Depreciation and Amortization | 41.3 |  | 33.7 |  | 7.6 |
Taxes Other than Income Taxes | 13.4 |  | 12.1 |  | 1.3 |
Operating Income | 39.5 |  | 34.0 |  | 5.5 |
Interest Expense | (16.2 | ) | (13.3 | ) | (2.9 | )
Equity Earnings in ATC | 4.7 |  | 4.7 |  | — |
Other Income | 0.7 |  | 0.7 |  | — |
Income Before Non-Controlling Interest and Income Taxes | 28.7 |  | 26.1 |  | 2.6 |
Income Tax Expense | 6.4 |  | 2.5 |  | 3.9 |
Net Income (Loss) | 22.3 |  | 23.6 |  | (1.3 | )
Less: Non-Controlling Interest in Subsidiaries | (0.2 | ) | — |  | (0.2 | )
Net Income (Loss) Attributable to ALLETE | $22.5 |  | $23.6 |  | $(1.1)
NOTE 2. BUSINESS SEGMENTS (Continued)
| Consolidated |  | Regulated Operations |  | Investments and Other |
Millions |  |  |
Quarter Ended June 30, 2014 |  |  |
Operating Revenue |  | $260.7 |  |  | $229.6 |  |  | $31.1 |
Fuel and Purchased Power | 83.6 |  | 83.6 |  | — |
Transmission Services | 10.5 |  | 10.5 |  | — |
Cost of Sales | 18.9 |  | 4.3 |  | 14.6 |
Operating and Maintenance | 74.3 |  | 63.6 |  | 10.7 |
Depreciation and Amortization | 33.9 |  | 29.6 |  | 4.3 |
Taxes Other than Income Taxes | 11.3 |  | 10.6 |  | 0.7 |
Operating Income | 28.2 |  | 27.4 |  | 0.8 |
Interest Expense | (13.5 | ) | (11.4 | ) | (2.1 | )
Equity Earnings in ATC | 5.2 |  | 5.2 |  | — |
Other Income (Expense) | 1.9 |  | 2.0 |  | (0.1 | )
Income (Loss) Before Non-Controlling Interest and Income Taxes | 21.8 |  | 23.2 |  | (1.4 | )
Income Tax Expense (Benefit) | 4.9 |  | 5.7 |  | (0.8 | )
Net Income (Loss) | 16.9 |  | 17.5 |  | (0.6 | )
Less: Non-Controlling Interest in Subsidiaries | 0.1 |  | — |  | 0.1 |
Net Income (Loss) Attributable to ALLETE |  | $16.8 |  |  | $17.5 |  | $(0.7)
| Consolidated |  | Regulated Operations |  | Investments and Other |
Millions |  |  |
Six Months Ended June 30, 2015 |  |  |
Operating Revenue |  | $643.3 |  |  | $492.8 |  |  | $150.5 |
Fuel and Purchased Power | 166.1 |  | 166.1 |  | — |
Transmission Services | 26.2 |  | 26.2 |  | — |
Cost of Sales | 83.5 |  | 5.5 |  | 78.0 |
Operating and Maintenance | 165.1 |  | 116.5 |  | 48.6 |
Depreciation and Amortization | 80.3 |  | 65.8 |  | 14.5 |
Taxes Other than Income Taxes | 26.2 |  | 23.7 |  | 2.5 |
Operating Income | 95.9 |  | 89.0 |  | 6.9 |
Interest Expense | (31.3 | ) | (26.3 | ) | (5.0 | )
Equity Earnings in ATC | 8.6 |  | 8.6 |  | — |
Other Income | 1.8 |  | 1.6 |  | 0.2 |
Income Before Non-Controlling Interest and Income Taxes | 75.0 |  | 72.9 |  | 2.1 |
Income Tax Expense | 12.6 |  | 7.9 |  | 4.7 |
Net Income (Loss) | 62.4 |  | 65.0 |  | (2.6 | )
Less: Non-Controlling Interest in Subsidiaries | — |  | — |  | — |
Net Income (Loss) Attributable to ALLETE |  | $62.4 |  |  | $65.0 |  | $(2.6)
As of June 30, 2015 |  |  |
Total Assets |  | $4,673.0 |  |  | $3,783.2 |  |  | $889.8 |
Property, Plant and Equipment – Net |  | $3,451.5 |  |  | $3,056.9 |  |  | $394.6 |
Accumulated Depreciation |  | $1,380.1 |  |  | $1,294.0 |  |  | $86.1 |
Capital Additions |  | $117.9 |  |  | $111.7 |  |  | $6.2 |
NOTE 2. BUSINESS SEGMENTS (Continued)
| Consolidated |  | Regulated Operations |  | Investments and Other |
Millions |  |  |
Six Months Ended June 30, 2014 |  |  |
Operating Revenue |  | $557.2 |  |  | $493.8 |  |  | $63.4 |
Fuel and Purchased Power | 179.8 |  | 179.8 |  | — |
Transmission Services | 21.3 |  | 21.3 |  | — |
Cost of Sales | 42.4 |  | 13.0 |  | 29.4 |
Operating and Maintenance | 148.6 |  | 124.1 |  | 24.5 |
Depreciation and Amortization | 66.1 |  | 58.4 |  | 7.7 |
Taxes Other than Income Taxes | 22.5 |  | 20.8 |  | 1.7 |
Operating Income | 76.5 |  | 76.4 |  | 0.1 |
Interest Expense | (26.3 | ) | (22.9 | ) | (3.4 | )
Equity Earnings in ATC | 10.3 |  | 10.3 |  | — |
Other Income | 3.9 |  | 3.8 |  | 0.1 |
Income (Loss) Before Non-Controlling Interest and Income Taxes | 64.4 |  | 67.6 |  | (3.2 | )
Income Tax Expense (Benefit) | 13.7 |  | 16.2 |  | (2.5 | )
Net Income (Loss) | 50.7 |  | 51.4 |  | (0.7 | )
Less: Non-Controlling Interest in Subsidiaries | 0.4 |  | — |  | 0.4 |
Net Income (Loss) Attributable to ALLETE |  | $50.3 |  |  | $51.4 |  | $(1.1)
As of June 30, 2014 |  |  |  |  |  |
Total Assets |  | $3,895.6 |  |  | $3,424.3 |  |  | $471.3 |
Property, Plant and Equipment – Net |  | $3,020.4 |  |  | $2,791.7 |  |  | $228.7 |
Accumulated Depreciation |  | $1,288.9 |  |  | $1,221.1 |  |  | $67.8 |
Capital Additions |  | $341.7 |  |  | $335.6 |  |  | $6.1 |

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