CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current Assets:
Cash and cash equivalents	$ 1	$ 1
Accounts receivable, net	542	603
Accrued unbilled revenue	253	270
Accounts and notes receivable - affiliated companies	17	19
Inventory	273	304
Non-trading derivative assets	87	54
Taxes receivable	1	63
Deferred income tax assets	8	48
Prepaid expenses and other current assets	122	208
Total current assets	1,304	1,570
Property, plant and equipment, net	7,030	6,636
Other Assets:
Goodwill	1,696	1,696
Non-trading derivative assets	20	15
Investment in unconsolidated affiliates	472	468
Other	165	153
Total other assets	2,353	2,332
Total Assets	10,687	10,538
Current Liabilities:
Short-term borrowings	62	53
Accounts payable	427	573
Accounts and notes payable - affiliated companies	419	541
Taxes accrued	82	73
Interest accrued	48	51
Customer deposits	74	76
Non-trading derivative liabilities	46	68
Other	157	255
Total current liabilities	1,315	1,690
Other Liabilities:
Accumulated deferred income taxes, net	1,420	1,319
Non-trading derivative liabilities	6	16
Benefit obligations	108	100
Regulatory liabilities	597	572
Other	232	140
Total other liabilities	2,363	2,147
Long-term Debt	2,919	2,925
Total stockholder's equity	4,090	3,776
Total Liabilities and Stockholder's Equity	$ 10,687	$ 10,538