CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Assets
Cash and cash equivalents	$ 20.3	$ 5.7
Accounts receivable and accrued unbilled revenues, net of reserves of $4.3 and $2.5, respectively	188.8	209.8
Receivables from related parties	4.5	5.2
Inventories
Fuel and Gas	65.9	60.0
Materials and supplies, at average cost	39.0	34.9
Regulatory assets	32.8	46.2
Prepaid taxes	40.8	63.6
Other current assets	16.4	16.7
Current assets	408.5	442.1
Property, plant, and equipment, net of accumulated depreciation of $1,526.9 and $1,483.1, respectively	2,977.6	2,887.7
Regulatory assets	345.3	342.5
Goodwill	36.4	36.4
Pension and other postretirement benefit assets	219.0	145.1
Other long-term assets	109.8	107.5
Total assets	4,096.6	3,961.3
Liabilities and Shareholders' Equity
Short-term debt	60.4	25.6
Current portion of long-term debt to parent	2.2	0
Accounts payable	146.9	131.8
Payables to related parties	16.5	13.8
Regulatory liabilities	25.2	38.0
Other current liabilities	68.9	72.0
Current liabilities	320.1	281.2
Long-term debt to parent	3.7	6.3
Long-term debt	1,174.5	1,174.5
Deferred income taxes	655.5	619.5
Deferred investment tax credits	7.9	8.1
Regulatory liabilities	338.3	286.3
Environmental remediation liabilities	70.0	64.4
Pension and other postretirement benefit obligations	33.5	76.4
Payables to related parties	5.7	6.1
Other long-term liabilities	68.1	71.9
Long-term liabilities	2,357.2	2,313.5
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	764.9	723.5
Retained earnings	507.6	496.3
Total liabilities and shareholders’ equity	$ 4,096.6	$ 3,961.3