CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
CURRENT ASSETS:
Accounts receivable, net	$ 67	$ 74
Accounts receivable from related companies	12	14
Exchanges receivable	8	10
System natural gas and operating supplies	165	144
Other	21	20
Total current assets	273	262
PROPERTY, PLANT AND EQUIPMENT:
Plant in service	4,096	4,076
Construction work in progress	58	45
Total property, plant and equipment	4,154	4,121
Accumulated depreciation and amortization	(176)	(57)
Net property, plant and equipment	3,978	4,064
GOODWILL	1,785	1,785
NOTE RECEIVABLE FROM RELATED PARTY	483	831
OTHER NON-CURRENT ASSETS	115	108
Total assets	6,634	7,050
CURRENT LIABILITIES:
Current portion of long-term debt	0	258
Accounts payable	15	12
Accounts payable to related companies	56	27
Exchanges payable	153	130
Accrued taxes	25	13
Accrued interest	21	13
Other	42	69
Total current liabilities	312	522
LONG-TERM DEBT, less current portion	1,028	1,499
DEFERRED INCOME TAXES	892	853
OTHER NON-CURRENT LIABILITIES	213	135
COMMITMENTS AND CONTINGENCIES (Note 8)
PARTNERS’ CAPITAL:
Partners’ capital	4,198	4,050
Accumulated other comprehensive loss	(9)	(9)
Total partners’ capital	4,189	4,041
Total liabilities and partners’ capital	$ 6,634	$ 7,050