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Consolidated Balance Sheets (USD $)
In Millions, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Sep. 30, 2011
Utility Plant:      
Electric $ 348.2 $ 333.3 $ 326.6
Gas 398.4 382.3 363.9
Common 30.6 29.8 30.4
Construction Work in Progress 35.8 28.3 41.4
Total Utility Plant 813.0 773.7 762.3
Less: Accumulated Depreciation 277.9 263.0 262.5
Net Utility Plant 535.1 510.7 499.8
Current Assets:      
Cash 9.5 7.5 7.9
Accounts Receivable, net 30.7 44.2 30.4
Accrued Revenue 34.6 56.6 35.2
Gas Inventory 12.3 14.8 15.6
Materials and Supplies 3.6 3.6 3.8
Prepayments and Other 4.3 4.5 4.5
Total Current Assets 95.0 131.2 97.4
Noncurrent Assets:      
Regulatory Assets 136.9 139.8 130.9
Other Noncurrent Assets 17.0 18.5 20.6
Total Noncurrent Assets 153.9 158.3 151.5
TOTAL ASSETS 784.0 800.2 748.7
Capitalization:      
Common Stock Equity 250.9 191.7 181.2
Preferred Stock 2.0 2.0 2.0
Long-Term Debt, Less Current Portion 287.5 287.8 288.0
Total Capitalization 540.4 481.5 471.2
Current Liabilities:      
Long-Term Debt, Current Portion 0.5 0.5 0.5
Accounts Payable 17.1 26.4 16.0
Short-Term Debt 24.1 87.9 65.4
Energy Supply Contract Obligations 13.4 21.1 21.8
Taxes Payable 0.5 1.0 0.6
Other Current Liabilities 21.4 17.5 22.5
Total Current Liabilities 77.0 154.4 126.8
Deferred Income Taxes 51.7 46.3 46.7
Noncurrent Liabilities:      
Energy Supply Contract Obligations 3.6 4.2 6.1
Retirement Benefit Obligations 88.9 91.2 74.1
Environmental Obligations 14.5 14.5 14.4
Other Noncurrent Liabilities 7.9 8.1 9.4
Total Noncurrent Liabilities 114.9 118.0 104.0
TOTAL CAPITALIZATION AND LIABILITIES $ 784.0 $ 800.2 $ 748.7