Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets
Cash and cash equivalents	$ 0	$ 0
Accounts and note receivable
Customer, net of allowance	9	8
Affiliates	10	20
Other	64	76
Materials and supplies	57	57
Deferred income taxes	25	52
Other	13	10
Total current assets	178	223
Property, plant and equipment, at cost	5,182	5,158
Less accumulated depreciation and amortization	1,016	1,002
Property, plant and equipment before additional acquisition cost assigned to utility plant	4,166	4,156
Additional acquisition cost assigned to utility plant, net	1,873	1,883
Total property, plant and equipment, net	6,039	6,039
Other long-term assets
Note receivable from affiliate	523	519
Investment in unconsolidated affiliate	57	57
Other	84	84
Total other long-term assets	664	660
Total assets	6,881	6,922
Accounts payable
Trade	59	80
Affiliates	34	45
Other	51	64
Taxes payable	23	23
Contractual deposits	28	29
Asset retirement obligations	41	22
Accrued interest	45	32
Accrued liabilities	5	73
Regulatory liabilities	19	40
Other	6	8
Total current liabilities	311	416
Long-term debt	1,769	1,768
Other long-term liabilities
Deferred income taxes	1,515	1,514
Regulatory liabilities	13	11
Other	30	30
Total other long-term liabilities	1,558	1,555
Commitments and contingencies (Note 3)
Member's equity	3,239	3,179
Accumulated other comprehensive income	4	4
Total member's equity	3,243	3,183
Total liabilities and member's equity	$ 6,881	$ 6,922