CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current Assets:
Cash and cash equivalents	$ 5	$ 1
Accounts receivable, net	475	542
Accrued unbilled revenue	106	253
Accounts and notes receivable - affiliated companies	15	17
Materials and supplies	85	86
Inventory	87	187
Non-trading derivative assets	84	87
Taxes receivable	2	1
Deferred income tax assets	7	8
Prepaid expenses and other current assets	130	122
Total current assets	996	1,304
Property, Plant and Equipment:
Property, plant and equipment	8,618	8,519
Less accumulated depreciation and amortization	1,547	1,489
Property, plant and equipment, net	7,071	7,030
Other Assets:
Goodwill	1,696	1,696
Non-trading derivative assets	18	20
Investment in unconsolidated affiliates	474	472
Other	158	165
Total other assets	2,346	2,353
Total Assets	10,413	10,687
Current Liabilities:
Short-term borrowings	9	62
Accounts payable	260	427
Accounts and notes payable - affiliated companies	513	419
Taxes accrued	92	82
Interest accrued	56	48
Customer deposits	76	74
Non-trading derivative liabilities	18	46
Other	94	157
Total current liabilities	1,118	1,315
Other Liabilities:
Accumulated deferred income taxes, net	1,522	1,420
Non-trading derivative liabilities	5	6
Benefit obligations	108	108
Regulatory liabilities	611	597
Other	203	232
Total other liabilities	2,449	2,363
Long-term Debt	2,636	2,919
Commitments and Contingencies (Note 9)
Stockholder’s Equity:
Common stock	0	0
Paid-in capital	2,418	2,416
Retained earnings	1,799	1,681
Accumulated other comprehensive loss	(7)	(7)
Total stockholder’s equity	4,210	4,090
Total Liabilities and Stockholder's Equity	$ 10,413	$ 10,687