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Consolidated Balance Sheets (USD $)
In Millions, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Jun. 30, 2013
Current Assets:      
Cash and Cash Equivalents $ 12.0 $ 9.4 $ 7.1
Accounts Receivable, net 44.9 52.2 40.8
Accrued Revenue 33.4 56.6 38.3
Exchange Gas Receivable 8.3 10.8 7.6
Gas Inventory 0.8 1.2 0.8
Deferred Income Taxes 1.5    
Materials and Supplies 6.1 5.0 5.4
Prepayments and Other 6.9 4.8 5.6
Total Current Assets 113.9 140.0 105.6
Utility Plant:      
Gas 483.9 477.3 431.6
Electric 379.1 375.6 359.1
Common 32.3 31.6 31.5
Construction Work in Progress 34.3 24.6 40.4
Total Utility Plant 929.6 909.1 862.6
Less: Accumulated Depreciation 247.9 243.5 237.2
Net Utility Plant 681.7 665.6 625.4
Other Noncurrent Assets:      
Regulatory Assets 88.1 100.1 125.9
Other Assets 16.9 14.9 17.3
Total Other Noncurrent Assets 105.0 115.0 143.2
TOTAL ASSETS 900.6 920.6 874.2
Current Liabilities:      
Accounts Payable 20.5 38.1 21.7
Short-Term Debt 35.0 60.2 24.5
Long-Term Debt, Current Portion 2.5 2.5 0.6
Energy Supply Obligations 12.3 14.4 9.8
Deferred Income Taxes   6.7 3.1
Dividends Declared and Payable     4.8
Environmental Obligations 6.4 1.0 1.0
Interest Payable 3.1 3.1 3.1
Regulatory Liabilities 13.0 9.7 13.3
Other Current Liabilities 9.8 9.0 8.7
Total Current Liabilities 102.6 144.7 90.6
Noncurrent Liabilities:      
Deferred Income Taxes 87.8 73.2 54.4
Cost of Removal Obligations 60.8 57.3 54.7
Retirement Benefit Obligations 80.8 77.3 110.6
Capital Lease Obligations 5.6 0.2 0.4
Environmental Obligations 2.0 13.8 13.8
Other Noncurrent Liabilities 5.6 4.1 4.7
Total Noncurrent Liabilities 242.6 225.9 238.6
Capitalization:      
Long-Term Debt, Less Current Portion 284.6 284.8 287.0
Common Stock Equity:      
Common Equity (Outstanding 13,895,777, 13,822,318 and 13,841,400 Shares) 233.6 232.1 231.0
Retained Earnings 37.0 32.9 26.8
Total Common Stock Equity 270.6 265.0 257.8
Preferred Stock 0.2 0.2 0.2
Total Capitalization 555.4 550.0 545.0
TOTAL LIABILITIES AND CAPITALIZATION $ 900.6 $ 920.6 $ 874.2