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v2.4.0.8

Business Segments (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Dec. 31, 2012
Business Segments [Line Items] |  |  |  |  |
Operating Revenue | $ 235.6 | $ 216.4 | $ 499.4 | $ 456.4 |
Fuel and Purchased Power Expense | 78.7 | 72.1 | 165.2 | 149.2 |
Operating and Maintenance Expense | 103.8 | 96.2 | 208.5 | 196.1 |
Depreciation Expense | 28.7 | 24.8 | 56.9 | 49.4 |
Operating Income (Loss) | 24.4 | 23.3 | 68.8 | 61.7 |
Interest Expense | (12.8) | (10.1) | (25.1) | (21.1) |
Equity Earnings in ATC | 5.0 | 4.8 | 10.2 | 9.4 |
Other Income (Expense) | 1.5 | 1.2 | 4.2 | 1.9 |
Income (Loss) Before Income Taxes | 18.1 | 19.2 | 58.1 | 51.9 |
Income Tax Expense (Benefit) | 4.1 | 4.8 | 11.6 | 13.1 |
Net Income | 14.0 | 14.4 | 46.5 | 38.8 |
Total Assets | 3,350.9 | 2,962.2 | 3,350.9 | 2,962.2 | 3,253.4
Property, Plant and Equipment - Net | 2,397.2 | 2,177.5 | 2,397.2 | 2,177.5 | 2,347.6
Accumulated Depreciation | 1,202.8 | 1,124.5 | 1,202.8 | 1,124.5 |
Capital Additions |  |  | 100.2 | 235.1 |
Regulated Operations [Member] |  |  |  |  |
Business Segments [Line Items] |  |  |  |  |
Operating Revenue | 215.8 | 197.0 | 457.2 | 415.6 |
Fuel and Purchased Power Expense | 78.7 | 72.1 | 165.2 | 149.2 |
Operating and Maintenance Expense | 82.8 | 76.1 | 165.0 | 154.2 |
Depreciation Expense | 27.1 | 23.4 | 53.9 | 46.6 |
Operating Income (Loss) | 27.2 | 25.4 | 73.1 | 65.6 |
Interest Expense | (10.4) | (9.9) | (21.1) | (19.5) |
Equity Earnings in ATC | 5.0 | 4.8 | 10.2 | 9.4 |
Other Income (Expense) | 1.1 | 1.2 | 2.2 | 2.0 |
Income (Loss) Before Income Taxes | 22.9 | 21.5 | 64.4 | 57.5 |
Income Tax Expense (Benefit) | 6.6 | 7.1 | 16.0 | 18.7 |
Net Income | 16.3 | 14.4 | 48.4 | 38.8 |
Total Assets | 2,997.0 | 2,755.4 | 2,997.0 | 2,755.4 |
Property, Plant and Equipment - Net | 2,329.6 | 2,119.9 | 2,329.6 | 2,119.9 |
Accumulated Depreciation | 1,143.2 | 1,070.1 | 1,143.2 | 1,070.1 |
Capital Additions |  |  | 97.2 | 232.3 |
Investments and Other [Member] |  |  |  |  |
Business Segments [Line Items] |  |  |  |  |
Land in Minnesota (in acres) | 6,000 |  | 6,000 |  |
Operating Revenue | 19.8 | 19.4 | 42.2 | 40.8 |
Fuel and Purchased Power Expense | 0 | 0 | 0 | 0 |
Operating and Maintenance Expense | 21.0 | 20.1 | 43.5 | 41.9 |
Depreciation Expense | 1.6 | 1.4 | 3.0 | 2.8 |
Operating Income (Loss) | (2.8) | (2.1) | (4.3) | (3.9) |
Interest Expense | (2.4) | (0.2) | (4.0) | (1.6) |
Equity Earnings in ATC | 0 | 0 | 0 | 0 |
Other Income (Expense) | 0.4 | 0 | 2.0 | (0.1) |
Income (Loss) Before Income Taxes | (4.8) | (2.3) | (6.3) | (5.6) |
Income Tax Expense (Benefit) | (2.5) | (2.3) | (4.4) | (5.6) |
Net Income | (2.3) | 0 | (1.9) | 0 |
Total Assets | 353.9 | 206.8 | 353.9 | 206.8 |
Property, Plant and Equipment - Net | 67.6 | 57.6 | 67.6 | 57.6 |
Accumulated Depreciation | 59.6 | 54.4 | 59.6 | 54.4 |
Capital Additions |  |  | $ 3.0 | $ 2.8 |

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