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Consolidated Balance Sheets (USD $)
In Millions, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2011
Utility Plant:      
Electric $ 345.9 $ 333.3 $ 326.5
Gas 393.4 382.3 366.7
Common 30.6 29.8 30.4
Construction Work in Progress 23.1 28.3 21.2
Total Utility Plant 793.0 773.7 744.8
Less: Accumulated Depreciation 273.0 263.0 260.6
Net Utility Plant 520.0 510.7 484.2
Current Assets:      
Cash 6.8 7.5 5.8
Accounts Receivable, net 31.7 44.2 32.9
Accrued Revenue 30.7 56.6 26.0
Gas Inventory 9.1 14.8 8.3
Materials and Supplies 4.1 3.6 3.9
Prepayments and Other 6.0 4.5 5.3
Total Current Assets 88.4 131.2 82.2
Noncurrent Assets:      
Regulatory Assets 139.8 139.8 136.1
Other Noncurrent Assets 20.1 18.5 25.1
Total Noncurrent Assets 159.9 158.3 161.2
TOTAL ASSETS 768.3 800.2 727.6
Capitalization:      
Common Stock Equity 254.7 191.7 186.3
Preferred Stock 2.0 2.0 2.0
Long-Term Debt, Less Current Portion 287.6 287.8 288.1
Total Capitalization 544.3 481.5 476.4
Current Liabilities:      
Long-Term Debt, Current Portion 0.5 0.5 0.5
Accounts Payable 15.9 26.4 15.8
Short-Term Debt 5.0 87.9 51.3
Energy Supply Contract Obligations 12.7 21.1 15.5
Taxes Payable 0.1 1.0 0.4
Other Current Liabilities 20.2 17.5 17.3
Total Current Liabilities 54.4 154.4 100.8
Deferred Income Taxes 51.8 46.3 48.1
Noncurrent Liabilities:      
Energy Supply Contract Obligations 3.8 4.2 8.3
Retirement Benefit Obligations 91.1 91.2 72.1
Environmental Obligations 14.5 14.5 14.5
Other Noncurrent Liabilities 8.4 8.1 7.4
Total Noncurrent Liabilities 117.8 118.0 102.3
TOTAL CAPITALIZATION AND LIABILITIES $ 768.3 $ 800.2 $ 727.6