CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
OPERATING REVENUES:
Transportation and storage of natural gas	$ 115	$ 121	$ 371	$ 393
Other	5	5	14	16
Total operating revenues	120	126	385	409
OPERATING EXPENSES:
Cost of natural gas and other energy	0	1	2	4
Operating and maintenance	53	56	155	159
General and administrative	11	12	29	35
Depreciation and amortization	33	31	98	101
Total operating expenses	97	100	284	299
OPERATING INCOME	23	26	101	110
OTHER INCOME (EXPENSE):
Interest expense, net	(12)	(13)	(37)	(38)
Equity in earnings of unconsolidated affiliates	0	28	0	26
Interest income - affiliates	9	6	23	7
Other, net	0	1	0	5
Total other expenses, net	(3)	22	(14)	0
INCOME BEFORE INCOME TAX EXPENSE	20	48	87	110
Income tax expense	7	23	28	35
NET INCOME (LOSS)	13	25	59	75
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	13	25	59	76
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	0	0	0	1
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest