Consolidated Balance Sheets Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 175	$ 47
Accounts receivable, net	681	653
Income taxes receivable	0	70
Inventories:
Materials and supplies	202	196
Fuel	268	237
Deferred income taxes	96	129
Regulatory assets	58	74
Other current assets	73	77
Total current assets	1,553	1,483
Property, plant and equipment, net	17,872	17,374
Regulatory assets	1,704	1,810
Other assets	441	439
Total assets	21,570	21,106
Current liabilities:
Accounts payable	464	582
Income taxes payable	89	0
Accrued employee expenses	111	72
Accrued interest	97	105
Accrued property and other taxes	115	66
Derivative contracts	43	90
Short-term debt	0	688
Current portion of long-term debt and capital lease obligations	267	19
Regulatory liabilities	45	67
Other current liabilities	118	125
Total current liabilities	1,349	1,814
Regulatory liabilities	843	826
Long-term debt and capital lease obligations	6,605	6,194
Deferred income taxes	4,107	3,863
Other long-term liabilities	1,013	1,097
Total liabilities	13,917	13,794
Commitments and contingencies (Note 8)
Shareholders' equity:
Preferred stock	41	41
Common stock - 750 shares authorized, no par value, 357 shares issued and outstanding	0	0
Additional paid-in capital	4,479	4,479
Retained earnings	3,142	2,801
Accumulated other comprehensive loss, net	(9)	(9)
Total shareholders' equity	7,653	7,312
Total liabilities and shareholders' equity	$ 21,570	$ 21,106