CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Current Assets:
Cash and cash equivalents	$ 4	$ 1
Accounts receivable, net	322	544
Accrued unbilled revenue	78	258
Accounts and notes receivable — affiliated companies	36	15
Materials and supplies	35	83
Natural gas inventory	237	145
Non-trading derivative assets	26	36
Taxes receivable	37	0
Prepaid expenses and other current assets	41	133
Total current assets	816	1,215
Property, Plant and Equipment:
Property, plant and equipment	4,746	9,615
Less accumulated depreciation and amortization	1,353	1,714
Property, plant and equipment, net	3,393	7,901
Other Assets:
Goodwill	840	1,468
Non-trading derivative assets	10	6
Investment in unconsolidated affiliates	4,525	405
Notes receivable from unconsolidated affiliates	363	0
Other	162	195
Total other assets	5,900	2,074
Total Assets	10,109	11,190
Current Liabilities:
Short-term borrowings	70	38
Current portion of long-term debt	0	365
Accounts payable	240	443
Accounts and notes payable — affiliated companies	153	818
Taxes accrued	68	72
Interest accrued	40	48
Customer deposits	77	79
Non-trading derivative liabilities	6	14
Other	145	177
Total current liabilities	799	2,054
Other Liabilities:
Accumulated deferred income taxes, net	2,004	1,676
Non-trading derivative liabilities	1	2
Benefit obligations	122	122
Regulatory liabilities	638	619
Other	194	208
Total other liabilities	2,959	2,627
Long-Term Debt	2,120	2,276
Commitments and Contingencies (Note 10)
Stockholder’s Equity:
Common stock	0	0
Paid-in capital	2,416	2,416
Retained earnings	1,816	1,818
Accumulated other comprehensive loss	(1)	(1)
Total stockholder’s equity	4,231	4,233
Total Liabilities and Stockholder’s Equity	$ 10,109	$ 11,190