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CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Current assets |  |
Cash and cash equivalents | $ 45.7 | $ 37.5
Accounts receivable and unbilled revenues, net of reserves of $123.1 and $108.0, respectively | 1,191.4 | 1,241.7
Materials, supplies, and inventories | 417.1 | 587.6
Prepayments | 161.8 | 204.4
Other | 39.3 | 97.5
Current assets | 1,855.3 | 2,168.7
Long-term assets |  |
Property, plant, and equipment, net of accumulated depreciation of $8,312.8 and $8,214.6, respectively | 19,990.2 | 19,915.5
Regulatory assets | 3,084.1 | 3,087.9
Equity investment in transmission affiliate | 1,513.3 | 1,443.9
Goodwill | 3,046.2 | 3,046.2
Other | 527.5 | 461.0
Long-term assets | 28,161.3 | 27,954.5
Total assets | 30,016.6 | 30,123.2
Current liabilities |  |
Short-term debt | 670.4 | 860.2
Current portion of long-term debt | 158.0 | 157.2
Accounts payable | 582.3 | 861.5
Accrued payroll and benefits | 107.5 | 163.8
Accrued interest | 115.1 | 67.0
Other | 421.3 | 321.9
Current liabilities | 2,054.6 | 2,431.6
Long-term liabilities |  |
Long-term debt | 9,143.6 | 9,158.2
Deferred income taxes | 5,287.4 | 5,146.6
Deferred revenue, net | 561.0 | 566.2
Regulatory liabilities | 1,563.4 | 1,563.8
Environmental remediation liabilities | 630.7 | 633.6
Pension and OPEB obligations | 458.9 | 498.6
Other | 1,161.0 | 1,164.4
Long-term liabilities | 18,806.0 | 18,731.4
Commitments and contingencies (Note 14) |  |
Common shareholders' equity |  |
Common stock – $0.01 par value; 325,000,000 shares authorized; 315,579,222 and 315,614,941 shares outstanding, respectively | 3.2 | 3.2
Additional paid in capital | 4,297.7 | 4,309.8
Retained earnings | 4,822.0 | 4,613.9
Accumulated other comprehensive income | 2.7 | 2.9
Common shareholders' equity | 9,125.6 | 8,929.8
Preferred stock of subsidiary | 30.4 | 30.4
Total liabilities and equity | $ 30,016.6 | $ 30,123.2

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