CONSOLIDATED BALANCE SHEETS (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
CURRENT ASSETS:
Cash and cash equivalents	$ 0	$ 0
Accounts receivable, net	67	74
Accounts receivable from related companies	58	14
Exchanges receivable	9	10
System natural gas and operating supplies	138	144
Other	17	20
Total current assets	289	262
PROPERTY, PLANT AND EQUIPMENT:
Plant in service	4,096	4,076
Construction work in progress	46	45
Total property, plant and equipment	4,142	4,121
Accumulated depreciation and amortization	(136)	(57)
Net property, plant and equipment	4,006	4,064
GOODWILL	1,785	1,785
NOTE RECEIVABLE FROM RELATED PARTY	831	831
OTHER NON-CURRENT ASSETS	267	108
Total assets	7,178	7,050
CURRENT LIABILITIES:
Current portion of long-term debt	252	258
Accounts payable	5	12
Accounts payable to related companies	29	27
Exchanges payable	123	130
Accrued taxes	20	13
Accrued interest	13	13
Other	55	69
Total current liabilities	497	522
LONG-TERM DEBT, less current portion	1,488	1,499
DEFERRED INCOME TAXES	899	853
OTHER NON-CURRENT LIABILITIES	142	135
COMMITMENTS AND CONTINGENCIES (Note 9)
PARTNERS’ CAPITAL:
Partners’ capital	4,161	4,050
Accumulated other comprehensive loss	(9)	(9)
Total partners’ capital	4,152	4,041
Total liabilities and partners’ capital	$ 7,178	$ 7,050