CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 13.3	$ 37.5
Accounts receivable and unbilled revenues, net of reserves of $164.7 and $140.0, respectively	957.9	1,176.5
Materials, supplies, and inventories	467.7	549.8
Prepayments	210.3	261.8
Other	64.2	68.0
Current assets	1,713.4	2,093.6
Long-term assets
Property, plant, and equipment, net of accumulated depreciation and amortization of $9,157.5 and $8,878.7, respectively	24,171.8	23,620.1
Regulatory assets	3,510.4	3,506.7
Equity investment in transmission affiliates	1,744.7	1,720.8
Goodwill	3,052.8	3,052.8
Other	848.9	957.8
Long-term assets	33,328.6	32,858.2
Total assets	35,042.0	34,951.8
Current liabilities
Short-term debt	1,211.5	830.8
Current portion of long-term debt	895.0	693.2
Accounts payable	696.6	908.1
Accrued payroll and benefits	161.6	199.8
Other	519.9	550.8
Current liabilities	3,484.6	3,182.7
Long-term liabilities
Long-term debt	10,721.6	11,211.0
Deferred income taxes	3,945.9	3,769.3
Deferred revenue, net	423.7	497.1
Regulatory liabilities	3,968.5	3,992.8
Environmental remediation liabilities	589.4	589.2
Pension and OPEB obligations	322.2	326.2
Other	1,093.4	1,128.9
Long-term liabilities	21,064.7	21,514.5
Commitments and contingencies (Note 21)
Common shareholders' equity
Common stock – $0.01 par value; 325,000,000 shares authorized; 315,434,531 shares outstanding	3.2	3.2
Additional paid in capital	4,165.0	4,186.6
Retained earnings	6,222.8	5,927.7
Accumulated other comprehensive loss	(7.3)	(4.1)
Common shareholders' equity	10,383.7	10,113.4
Preferred stock of subsidiary	30.4	30.4
Noncontrolling interests	78.6	110.8
Total liabilities and equity	$ 35,042.0	$ 34,951.8