Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash Flows From Operating Activities
Net Income	$ 119	$ 106
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	33	33
Other	(4)	4
Changes in components of working capital:
Accounts receivable	4	(18)
Other current assets, including inventories	2	2
Accounts payable	2	(17)
Accrued interest	7	7
Accrued taxes, other than income	(1)	(3)
Regulatory liabilities	(3)	(2)
Other current liabilities	3	(8)
Other long-term assets and liabilities	(1)	(10)
Net Cash Provided by Operating Activities	161	94
Cash Flows From Investing Activities
Capital expenditures	(14)	(19)
Net change in note receivable from affiliate	8	36
Other	3	0
Net Cash (Used in) Provided by Investing Activities	(3)	17
Cash Flows From Financing Activities
Payments of debt	(3)	(3)
Distributions to Members	(156)	(121)
Contributions from Members	0	13
Net Cash Used in Financing Activities	(159)	(111)
Net Decrease in Cash and Cash Equivalents	(1)	0
Cash and Cash Equivalents, beginning of period	1	2
Cash and Cash Equivalents, end of period	$ 0	$ 2