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CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Millions | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Current assets |  |
Cash and cash equivalents | $ 631 | $ 129
Accounts receivable, net | 1,022 | 916
Accrued unbilled revenues | 656 | 714
Inventories | 587 | 535
Regulatory assets | 1,073 | 640
Derivative instruments | 228 | 49
Prepaid taxes | 55 | 42
Prepayments and other | 235 | 250
Total current assets | 4,487 | 3,275
Property, plant and equipment, net | 44,730 | 42,950
Other assets |  |
Nuclear decommissioning fund and other investments | 3,446 | 3,096
Regulatory assets | 3,101 | 2,737
Derivative instruments | 72 | 30
Operating lease right-of-use assets | 1,342 | 1,490
Other | 339 | 379
Total other assets | 8,300 | 7,732
Total assets | 57,517 | 53,957
Current liabilities |  |
Current portion of long-term debt | 621 | 421
Short-term debt | 1,747 | 584
Accounts payable | 1,319 | 1,237
Regulatory liabilities | 338 | 311
Taxes accrued | 553 | 578
Accrued interest | 206 | 203
Dividends payable | 246 | 231
Derivative instruments | 76 | 53
Operating lease liabilities | 218 | 214
Other | 440 | 407
Total current liabilities | 5,764 | 4,239
Deferred credits and other liabilities |  |
Deferred income taxes | 4,913 | 4,746
Regulatory liabilities | 5,389 | 5,302
Asset retirement obligations | 3,094 | 2,884
Derivative instruments | 99 | 131
Customer advances | 199 | 197
Pension and employee benefit obligations | 515 | 666
Operating lease liabilities | 1,187 | 1,344
Other | 207 | 228
Total deferred credits and other liabilities | 15,603 | 15,498
Commitments and contingencies |  |
Capitalization |  |
Long-term debt | 20,979 | 19,645
Common stock — 1,000,000,000 shares authorized of $2.50 par value; 538,458,952 and 537,438,394 shares outstanding at Sept. 30, 2021 and Dec. 31, 2020, respectively | $ 1,346 | $ 1,344
Common Stock, Shares Authorized | 1,000,000,000 | 1,000,000,000
Common Stock, Par or Stated Value Per Share | $ 2.50 | $ 2.50
Common Stock, Shares, Outstanding | 538,458,952 | 537,438,394
Additional paid in capital | $ 7,443 | $ 7,404
Retained earnings | 6,508 | 5,968
Accumulated other comprehensive loss | (126) | (141)
Total common stockholders’ equity | 15,171 | 14,575
Total liabilities and equity | $ 57,517 | $ 53,957

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