CONDENSED CONSOLIDATED BALANCE SHEETS Statement (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Assets
Cash and cash equivalents	$ 6.4	$ 6.5
Accounts receivable and accrued unbilled revenues, net of reserves of $3.2 and $2.5, respectively	160.7	258.3
Receivables from related parties	4.7	5.0
Inventories
Fuel and Gas	78.2	76.3
Materials and supplies, at average cost	34.8	33.3
Regulatory assets	25.5	26.1
Prepaid taxes	69.1	84.7
Other current assets	13.2	13.3
Current assets	392.6	503.5
Property, plant, and equipment, net of accumulated depreciation of $1,477.5 and $1,336.0, respectively	2,834.6	2,353.0
Regulatory assets	550.7	536.2
Goodwill	36.4	36.4
Other long-term assets	129.6	92.8
Total assets	3,943.9	3,521.9
Liabilities and Shareholders' Equity
Short-term debt	314.4	95.4
Current portion of long-term debt	125.0	147.0
Accounts payable	108.5	131.0
Payables to related parties	16.3	13.5
Regulatory liabilities	23.4	27.6
Other current liabilities	73.1	61.8
Current liabilities	660.7	476.3
Long-term debt to parent	6.6	7.2
Long-term debt	724.5	724.4
Deferred income taxes	599.0	539.0
Deferred investment tax credits	8.2	8.5
Regulatory liabilities	288.8	281.0
Environmental remediation liabilities	64.9	68.8
Pension and other postretirement benefit obligations	145.5	164.6
Payables to related parties	6.2	6.7
Other long-term liabilities	73.5	72.7
Long-term liabilities	1,917.2	1,872.9
Commitments and contingencies
Preferred stock-$100 par value; 1,000,000 shares authorized; 511,882 shares issued and outstanding	51.2	51.2
Common stock – $4 par value; 32,000,000 shares authorized; 23,896,962 shares issued and outstanding	95.6	95.6
Additional paid-in capital	723.0	555.4
Retained earnings	496.2	470.5
Total liabilities and shareholders’ equity	$ 3,943.9	$ 3,521.9