Condensed Consolidated Balance Sheets (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 1,262	$ 1,175
Trade accounts receivable — net (includes $573 and $445 in pledged amounts related to a VIE (Notes 2 and 4))	796	710
Notes receivable from parent (Note 11)	0	698
Income taxes receivable from parent	7	0
Inventories (Note 12)	400	393
Commodity and other derivative contractual assets (Note 9)	973	1,463
Margin deposits related to commodity positions	21	71
Other current assets	34	120
Total current assets	3,493	4,630
Restricted cash (Note 12)	947	947
Investments (Note 12)	787	710
Property, plant and equipment — net (Note 12)	17,961	18,556
Goodwill (Note 3)	4,952	4,952
Identifiable intangible assets — net (Note 3)	1,736	1,781
Commodity and other derivative contractual assets (Note 9)	159	586
Other noncurrent assets, primarily unamortized debt amendment and issuance costs	859	811
Total assets	30,894	32,973
Current liabilities:
Short-term borrowings (includes $172 and $82 related to a VIE (Notes 2 and 5))	2,226	2,136
Long-term debt due currently (Note 5)	32	96
Trade accounts payable	354	389
Trade accounts and other payables to affiliates	205	139
Notes payable to parent (Note 11)	92	81
Commodity and other derivative contractual liabilities (Note 9)	594	894
Margin deposits related to commodity positions	353	600
Accumulated deferred income taxes	36	49
Accrued income taxes payable to parent (Note 11)	0	31
Accrued taxes other than income	95	17
Accrued interest	532	407
Other current liabilities	219	255
Total current liabilities	4,738	5,094
Accumulated deferred income taxes	3,347	3,759
Commodity and other derivative contractual liabilities (Note 9)	782	1,556
Notes or other liabilities due to affiliates	2	5
Long-term debt held by affiliates (Note 11)	382	382
Long-term debt, less amounts due currently (Note 5)	29,770	29,928
Affiliate tax sharing liability (Note 12)	723	0
Other noncurrent liabilities and deferred credits (Note 12)	1,793	2,643
Total liabilities	41,537	43,367
Commitments and Contingencies (Note 6)
Membership interests/equity (Note 7):
EFCH shareholder's equity	0	(10,506)
EFCH membership interests	(10,748)	0
Noncontrolling interests in subsidiaries	105	112
Total membership interests/equity	(10,643)	(10,394)
Total liabilities and membership interests/equity	$ 30,894	$ 32,973