CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Assets
Cash and cash equivalents	$ 5.7	$ 6.5
Accounts receivable and accrued unbilled revenues, net of reserves of $2.5 and $2.5, respectively	209.8	258.3
Receivables from related parties	5.2	5.0
Inventories
Fuel and Gas	60.0	76.3
Materials and supplies, at average cost	34.9	33.3
Regulatory assets	46.2	26.1
Prepaid taxes	63.6	84.7
Other current assets	16.7	13.3
Current assets	442.1	503.5
Property, plant, and equipment, net of accumulated depreciation of $1,483.1 and $1,336.0, respectively	2,887.7	2,353.0
Regulatory assets	342.5	536.2
Goodwill	36.4	36.4
Pension and other postretirement benefit assets	145.1	0
Other long-term assets	107.5	92.8
Total assets	3,961.3	3,521.9
Liabilities and Shareholders' Equity
Short-term debt	25.6	95.4
Current portion of long-term debt	0	147.0
Accounts payable	131.8	131.0
Payables to related parties	13.8	13.5
Regulatory liabilities	38.0	27.6
Other current liabilities	72.0	61.8
Current liabilities	281.2	476.3
Long-term debt to parent	6.3	7.2
Long-term debt	1,174.5	724.4
Deferred income taxes	619.5	539.0
Deferred investment tax credits	8.1	8.5
Regulatory liabilities	286.3	281.0
Environmental remediation liabilities	64.4	68.8
Pension and other postretirement benefit obligations	76.4	164.6
Payables to related parties	6.1	6.7
Other long-term liabilities	71.9	72.7
Long-term liabilities	2,313.5	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	723.5	555.4
Retained earnings	496.3	470.5
Total liabilities and shareholders’ equity	$ 3,961.3	$ 3,521.9