CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current Assets:
Cash and cash equivalents ($266 and $154 related to VIEs at December 31, 2012 and September 30, 2013, respectively)	$ 198	$ 646
Accounts and notes receivable, net ($68 and $77 related to VIEs at December 31, 2012 and September 30, 2013, respectively)	294	222
Accounts and notes receivable—affiliated companies	86	448
Accrued unbilled revenues	92	80
Inventory	103	94
Taxes receivable	0	7
Deferred tax asset	0	1
Other ($54 and $44 related to VIEs at December 31, 2012 and September 30, 2013, respectively)	57	77
Total current assets	830	1,575
Property, Plant and Equipment:
Property, plant and equipment	8,578	8,204
Less accumulated depreciation and amortization	2,919	2,839
Property, plant and equipment, net	5,659	5,365
Regulatory assets ($3,545 and $3,253 related to VIEs at December 31, 2012 and September 30, 2013, respectively)	3,100	3,388
Notes receivable—affiliated companies	750	750
Other	26	41
Total other assets	3,876	4,179
Total Assets	10,365	11,119
Current Liabilities:
Current portion of VIE transition and system restoration bonds long-term debt	353	447
Current portion of other long-term debt	0	450
Accounts payable	100	83
Accounts and notes payable—affiliated companies	121	92
Taxes accrued	109	95
Interest accrued	40	87
Other	95	112
Total current liabilities	818	1,366
Other Liabilities:
Accumulated deferred income taxes, net	2,058	2,097
Benefit obligations	267	268
Regulatory liabilities	515	473
Notes payable—affiliated companies	0	151
Other	58	40
Total other liabilities	2,898	3,029
Long-term Debt:
VIE transition and system restoration bonds	3,106	3,400
Other	1,595	1,595
Total long-term debt	4,701	4,995
Commitments and Contingencies (Note 8)
Member’s Equity:
Common stock	0	0
Paid-in capital	1,232	1,231
Retained earnings	716	498
Total member’s equity	1,948	1,729
Total Liabilities and Member’s Equity	$ 10,365	$ 11,119