CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
OPERATING REVENUES:
Transportation and storage of natural gas	$ 120	$ 123	$ 256	$ 272
Other	4	5	9	11
Total operating revenues	124	128	265	283
OPERATING EXPENSES:
Cost of natural gas and other energy	1	1	2	3
Operating and maintenance	52	50	102	103
General and administrative	8	11	18	23
Depreciation and amortization	33	35	65	70
Total operating expenses	94	97	187	199
OPERATING INCOME	30	31	78	84
OTHER INCOME (EXPENSE):
Interest expense, net	(12)	(12)	(25)	(25)
Equity in earnings of unconsolidated affiliates	0	(6)	0	(2)
Interest income - affiliates	7	1	14	1
Other, net	(1)	5	0	4
Total other expenses, net	(6)	(12)	(11)	(22)
INCOME BEFORE INCOME TAX EXPENSE	24	19	67	62
Income tax expense	9	0	21	12
NET INCOME (LOSS)	15	19	46	50
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	15	$ 19	46	51
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	0		0	1
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest	$ 0		$ 0	$ 1