CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Assets
Cash and cash equivalents	$ 86.4	$ 18.0
Accounts receivable and accrued unbilled revenues, net of reserves of $58.3 and $63.3, respectively	720.8	699.8
Inventories	179.9	327.2
Regulatory assets	86.2	118.9
Assets held for sale	51.5	52.2
Deferred income taxes	39.8	52.4
Prepaid taxes	51.7	136.2
Other current assets	43.0	57.4
Current assets	1,259.3	1,462.1
Property, plant, and equipment, net of accumulated depreciation of $3,330.2 and $3,322.0, respectively	6,928.8	6,827.7
Regulatory assets	1,507.3	1,513.6
Equity method investments	556.0	550.6
Goodwill	655.4	655.4
Other long-term assets	262.2	272.6
Total assets	11,169.0	11,282.0
Liabilities and Equity
Short-term debt	133.3	317.6
Current portion of long-term debt	125.0	125.0
Accounts payable	414.6	490.7
Accrued taxes	108.6	87.7
Regulatory liabilities	171.6	153.7
Liabilities held for sale	13.6	13.8
Other current liabilities	282.1	261.0
Current liabilities	1,248.8	1,449.5
Long-term debt	2,956.3	2,956.3
Deferred income taxes	1,599.5	1,570.0
Deferred investment tax credits	63.6	60.6
Regulatory liabilities	402.4	399.9
Environmental remediation liabilities	573.2	579.9
Pension and other postretirement benefit obligations	271.2	274.6
Asset retirement obligations	485.0	479.1
Other long-term liabilities	155.3	161.3
Long-term liabilities	6,506.5	6,481.7
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	80.0
Additional paid-in capital	2,629.2	2,642.2
Retained earnings	701.1	626.0
Accumulated other comprehensive loss	(26.8)	(27.6)
Shares in deferred compensation trust	(20.9)	(20.9)
Total common shareholders’ equity	3,362.6	3,299.7
Preferred stock of subsidiary – $100 par value; 1,000,000 shares authorized; 511,882 shares issued; 510,495 shares outstanding	51.1	51.1
Total liabilities and equity	$ 11,169.0	$ 11,282.0