CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Assets
Cash and cash equivalents	$ 45.0	$ 22.3
Accounts receivable and accrued unbilled revenues, net of reserves of $66.6 and $49.4, respectively	925.6	1,037.0
Inventories	223.8	253.1
Assets from risk management activities	253.4	239.5
Regulatory assets	119.4	127.4
Assets held for sale	290.4	272.6
Deferred income taxes	35.9	31.4
Prepaid taxes	72.7	146.9
Other current assets	72.2	87.4
Current assets	2,038.4	2,217.6
Property, plant, and equipment, net of accumulated depreciation of $3,325.0 and $3,236.9, respectively	6,444.5	6,216.7
Regulatory assets	1,337.5	1,361.4
Assets from risk management activities	88.3	75.4
Equity method investments	559.6	540.9
Goodwill	655.4	662.1
Other long-term assets	250.7	169.4
Total assets	11,374.4	11,243.5
Liabilities and Equity
Short-term debt	420.7	326.0
Current portion of long-term debt	0	100.0
Accounts payable	599.2	604.8
Liabilities from risk management activities	167.9	163.8
Accrued taxes	53.4	80.9
Regulatory liabilities	126.0	101.1
Liabilities held for sale	43.0	49.1
Other current liabilities	262.1	228.8
Current liabilities	1,672.3	1,654.5
Long-term debt	2,956.2	2,956.2
Deferred income taxes	1,482.8	1,390.3
Deferred investment tax credits	60.0	57.6
Regulatory liabilities	437.3	383.7
Environmental remediation liabilities	576.3	600.0
Pension and other postretirement benefit obligations	118.2	200.8
Liabilities from risk management activities	61.1	62.8
Asset retirement obligations	503.4	491.0
Other long-term liabilities	147.3	133.2
Long-term liabilities	6,342.6	6,275.6
Commitments and contingencies
Common stock – $1 par value; 200,000,000 shares authorized; 79,963,091 shares issued; 79,529,584 shares outstanding	80.0	79.9
Additional paid-in capital	2,654.7	2,660.5
Retained earnings	617.6	567.1
Accumulated other comprehensive loss	(22.9)	(23.2)
Shares in deferred compensation trust	(21.1)	(23.0)
Total common shareholders’ equity	3,308.3	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	1.0
Total liabilities and equity	$ 11,374.4	$ 11,243.5