CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
CURRENT ASSETS:
Cash and cash equivalents	$ 0	$ 0
Accounts receivable, net	79	74
Accounts receivable from related companies	123	14
Exchanges receivable	24	10
System natural gas and operating supplies	147	144
Other	19	20
Total current assets	392	262
PROPERTY, PLANT AND EQUIPMENT:
Plant in service	4,087	4,076
Construction work in progress	24	45
Total property, plant and equipment	4,111	4,121
Accumulated depreciation and amortization	(98)	(57)
Net property, plant and equipment	4,013	4,064
GOODWILL	1,785	1,785
NOTE RECEIVABLE FROM RELATED PARTY	831	831
OTHER NON-CURRENT ASSETS	114	108
Total assets	7,135	7,050
CURRENT LIABILITIES:
Current portion of long-term debt	255	258
Accounts payable	4	12
Accounts payable to related companies	56	27
Exchanges payable	145	130
Accrued taxes	17	13
Accrued interest	23	13
Other	43	69
Total current liabilities	543	522
LONG-TERM DEBT, less current portion	1,493	1,499
DEFERRED INCOME TAXES	874	853
OTHER NON-CURRENT LIABILITIES	143	135
COMMITMENTS AND CONTINGENCIES (Note 11)
PARTNERS’ CAPITAL:
Partners’ capital	4,091	4,050
Accumulated other comprehensive loss	(9)	(9)
Total partners’ capital	4,082	4,041
Total liabilities and partners’ capital	$ 7,135	$ 7,050