CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Assets
Cash and cash equivalents	$ 27.3	$ 179.0
Collateral on deposit	43.2	33.3
Accounts receivable and accrued unbilled revenues, net of reserves of $47.5 and $41.9, respectively	520.9	832.1
Inventories	308.7	247.9
Assets from risk management activities	181.5	236.9
Regulatory assets	80.9	117.9
Deferred income taxes	68.0	67.7
Prepaid taxes	265.0	269.9
Other current assets	72.5	65.7
Current assets	1,568.0	2,050.4
Property, plant, and equipment, net of accumulated depreciation of $2,997.6 and $2,900.2, respectively	5,063.3	5,013.4
Regulatory assets	1,473.0	1,495.1
Assets from risk management activities	71.9	89.4
Goodwill	658.4	642.5
Other long-term assets	582.3	526.0
Total assets	9,416.9	9,816.8
Liabilities and Equity
Short-term debt	240.2	10.0
Current portion of long-term debt	0.9	476.9
Accounts payable	386.7	453.0
Liabilities from risk management activities	215.9	289.6
Accrued taxes	60.0	90.2
Regulatory liabilities	44.1	75.7
Other current liabilities	238.5	262.4
Current liabilities	1,186.3	1,657.8
Long-term debt	2,080.7	2,161.6
Deferred income taxes	1,031.1	860.5
Deferred investment tax credits	44.6	45.2
Regulatory liabilities	343.3	316.2
Environmental remediation liabilities	628.2	643.9
Pension and other postretirement benefit obligations	531.7	603.4
Liabilities from risk management activities	80.4	99.7
Asset retirement obligations	334.0	320.9
Other long-term liabilities	138.2	150.6
Long-term liabilities	5,212.2	5,202.0
Commitments and contingencies
Common stock - $1 par value; 200,000,000 shares authorized; 78,287,906 shares issued; 77,913,759 shares outstanding	78.3	77.8
Additional paid-in capital	2,562.5	2,540.4
Retained earnings	380.1	350.8
Accumulated other comprehensive loss	(37.1)	(44.7)
Shares in deferred compensation trust	(16.6)	(18.5)
Total common shareholders' equity	2,967.2	2,905.8
Preferred stock of subsidiary - $100 par value; 1,000,000 shares authorized; 511,882 shares issued; 510,495 shares outstanding	51.1	51.1
Noncontrolling interest in subsidiaries	0.1	0.1
Total liabilities and equity	$ 9,416.9	$ 9,816.8