CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Assets
Cash and cash equivalents	$ 16.1	$ 22.3
Accounts receivable and accrued unbilled revenues, net of reserves of $65.5 and $49.4, respectively	756.5	1,037.0
Inventories	407.4	253.1
Assets from risk management activities	242.4	239.5
Regulatory assets	104.3	127.4
Assets held for sale	10.4	277.9
Deferred income taxes	76.1	31.4
Prepaid taxes	60.7	146.9
Other current assets	83.1	87.4
Current assets	1,757.0	2,222.9
Property, plant, and equipment, net of accumulated depreciation of $3,363.8 and $3,236.6, respectively	6,661.4	6,211.4
Regulatory assets	1,316.1	1,361.4
Assets from risk management activities	98.5	75.4
Equity method investments	568.9	540.9
Goodwill	655.4	662.1
Other long-term assets	327.6	169.4
Total assets	11,384.9	11,243.5
Liabilities and Equity
Short-term debt	392.5	326.0
Current portion of long-term debt	0	100.0
Accounts payable	622.4	604.8
Liabilities from risk management activities	165.7	163.8
Accrued taxes	72.6	80.9
Regulatory liabilities	130.7	101.1
Liabilities held for sale	0	49.1
Other current liabilities	245.4	228.8
Current liabilities	1,629.3	1,654.5
Long-term debt	2,956.3	2,956.2
Deferred income taxes	1,494.1	1,390.3
Deferred investment tax credits	60.4	57.6
Regulatory liabilities	439.5	383.7
Environmental remediation liabilities	558.1	600.0
Pension and other postretirement benefit obligations	121.0	200.8
Liabilities from risk management activities	70.2	62.8
Asset retirement obligations	509.6	491.0
Other long-term liabilities	151.4	133.2
Long-term liabilities	6,360.6	6,275.6
Commitments and contingencies
Common stock – $1 par value; 200,000,000 shares authorized; 79,963,091 shares issued; 79,534,171 shares outstanding	80.0	79.9
Additional paid-in capital	2,660.7	2,660.5
Retained earnings	646.5	567.1
Accumulated other comprehensive loss	(22.4)	(23.2)
Shares in deferred compensation trust	(20.9)	(23.0)
Total common shareholders’ equity	3,343.9	3,261.3
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
Total liabilities and equity	$ 11,384.9	$ 11,243.5