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Consolidated Balance Sheets (USD $)
In Millions, unless otherwise specified
Mar. 31, 2012
Dec. 31, 2011
ASSETS    
Cash and cash equivalents $ 63 $ 57
Receivables, less allowances of $76 and $75 for uncollectible accounts at respective dates 641 760
Accrued unbilled revenue 508 519
Inventory 340 350
Prepaid taxes 279 278
Derivative assets 51 65
Regulatory assets 692 494
Other current assets 188 89
Total current assets 2,762 2,612
Nuclear decommissioning trusts 3,853 3,592
Other investments 102 93
Total investments 3,955 3,685
Utility property, plant and equipment, less accumulated depreciation of $7,088 and $6,894 at respective dates 28,133 27,569
Nonutility property, plant and equipment, less accumulated depreciation of $110 and $107 at respective dates 72 73
Total property, plant and equipment 28,205 27,642
Derivative assets 65 70
Regulatory assets 6,124 5,815
Other long-term assets 494 491
Total long-term assets 6,683 6,376
Total assets 41,605 40,315
LIABILITIES AND EQUITY    
Short-term debt 330 419
Accounts payable 994 1,319
Accrued taxes 111 49
Accrued interest 125 167
Customer deposits 195 199
Derivative liabilities 254 266
Regulatory liabilities 645 670
Other current liabilities 538 759
Total current liabilities 3,192 3,848
Long-term debt 8,827 8,431
Deferred income taxes 6,166 5,781
Deferred investment tax credits 82 84
Customer advances 141 138
Derivative liabilities 1,135 805
Pensions and benefits 2,356 2,461
Asset retirement obligations 2,651 2,610
Regulatory liabilities 5,103 4,670
Other deferred credits and other long-term liabilities 1,589 1,529
Total deferred credits and other liabilities 19,223 18,078
Total liabilities 31,242 30,357
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 600 596
Accumulated other comprehensive loss (21) (24)
Retained earnings 6,221 6,173
Total common shareholder's equity 8,968 8,913
Preferred and preference stock 1,395 1,045
Total equity 10,363 9,958
Total liabilities and equity $ 41,605 $ 40,315