CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
OPERATING REVENUES:
Transportation and storage of natural gas	$ 496	$ 528	$ 555
Other	18	20	26
Total operating revenues	514	548	581
OPERATING EXPENSES:
Cost of Goods Sold	2	4	3
Operating, maintenance and general	209	216	209
General and Administrative Expense	39	42	46
Depreciation and amortization	130	133	130
Asset Impairment Charges	771	0	0
Total operating expenses	1,151	395	388
Operating Income (Loss)	(637)	153	193
OTHER INCOME (EXPENSE):
Interest expense, net	(49)	(50)	(66)
Income (loss) from unconsolidated affiliates	1	26	(12)
Interest income — affiliates	26	23	23
Other, net	0	5	5
Total other expenses, net	(22)	4	(50)
Income (Loss) from Continuing Operations Before Income Tax Expense	(659)	157	143
Income tax expense	(13)	52	182
Net Income (Loss)	(646)	105	(39)
Net Income (Loss) Attributable to Noncontrolling Interest	0	0	6
Net Income (Loss) Attributable to Partners	(646)	105	(45)
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	3	2	(3)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ (643)	$ 107	$ (48)