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Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified | Dec. 31, 2011 | Dec. 31, 2010
--- | --- | ---
ASSETS |  |
Cash and cash equivalents | $ 57 | $ 257
Receivables, less allowances of $75 and $85 for uncollectible accounts at respective dates | 760 | 715
Accrued unbilled revenue | 519 | 442
Inventory | 350 | 332
Prepaid taxes | 278 | 168
Derivative assets | 65 | 87
Regulatory assets | 494 | 378
Other current assets | 89 | 81
Total current assets | 2,612 | 2,460
Nuclear decommissioning trusts | 3,592 | 3,480
Other investments | 93 | 68
Total investments | 3,685 | 3,548
Utility property, plant and equipment, less accumulated depreciation of $6,894 and $6,319 at respective dates | 27,569 | 24,778
Nonutility property, plant and equipment, less accumulated depreciation of $107 and $100 at respective dates | 73 | 71
Total property, plant and equipment | 27,642 | 24,849
Derivative assets | 70 | 367
Regulatory assets | 5,815 | 4,347
Other long-term assets | 491 | 335
Total long-term assets | 6,376 | 5,049
Total assets | 40,315 | 35,906
LIABILITIES AND EQUITY |  |
Short-term debt | 419 | 0
Accounts payable | 1,319 | 1,271
Accrued taxes | 49 | 45
Accrued interest | 167 | 169
Customer deposits | 199 | 217
Derivative liabilities | 266 | 212
Regulatory liabilities | 670 | 738
Other current liabilities | 759 | 663
Total current liabilities | 3,848 | 3,315
Long-term debt | 8,431 | 7,627
Deferred income taxes | 5,781 | 4,829
Deferred investment tax credits | 84 | 118
Customer advances | 138 | 112
Derivative liabilities | 805 | 449
Pensions and benefits | 2,461 | 1,838
Asset retirement obligations | 2,610 | 2,507
Regulatory liabilities | 4,670 | 4,524
Other deferred credits and other long-term liabilities | 1,529 | 1,380
Total deferred credits and other liabilities | 18,078 | 15,757
Total liabilities | 30,357 | 26,699
Commitments and contingencies (Note 9) |  |
Common stock, no par value (560,000,000 shares authorized; 434,888,104 shares issued and outstanding at each date) | 2,168 | 2,168
Additional paid-in capital | 596 | 572
Accumulated other comprehensive loss | (24) | (25)
Retained earnings | 6,173 | 5,572
Total common shareholder's equity | 8,913 | 8,287
Preferred and preference stock | 1,045 | 920
Total equity | 9,958 | 9,207
Total liabilities and equity | $ 40,315 | $ 35,906

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