Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Current assets
Cash and cash equivalents	$ 0	$ 0
Accounts and notes receivable
Customer, net of allowance of $2 in 2011 and 2010	6	4
Affiliates	34	6
Other	20	20
Materials and supplies	48	48
Deferred income taxes	10	9
Prepaids	2	15
Regulatory assets	16	8
Other	1	3
Total current assets	137	113
Property, plant and equipment, at cost	3,998	3,970
Less accumulated depreciation and amortization	1,543	1,484
Total property, plant and equipment, net	2,455	2,486
Other long-term assets
Note receivable from affiliate	878	836
Other	105	110
Total other long-term assets	983	946
Total assets	3,575	3,545
Accounts payable
Trade	68	82
Affiliates	14	25
Other	9	11
Taxes payable	76	28
Accrued interest	29	18
Accrued liabilities	28	24
Regulatory liabilities	20	7
Contractual deposits	24	15
Other	2	5
Total current liabilities	270	215
Long-term debt	1,113	1,113
Other long-term liabilities
Deferred income taxes	415	408
Other	70	75
Total other long-term liabilities	485	483
Commitments and contingencies (Note 4)
Stockholder's equity
Common stock, par value $1 per share; 1,000 shares authorized, issued and outstanding	0	0
Additional paid-in capital	1,268	1,268
Retained earnings	433	466
Accumulated other comprehensive income	6	0
Total stockholder's equity	1,707	1,734
Total liabilities and stockholder's equity	$ 3,575	$ 3,545