CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
OPERATING REVENUES:
Transportation and storage of natural gas	$ 100	$ 119	$ 223	$ 255
Other	4	5	9	10
Total operating revenues	104	124	232	265
OPERATING EXPENSES:
Cost of natural gas and other energy	1	1	2	2
Operating and maintenance	46	52	97	102
General and administrative	7	8	17	18
Depreciation and amortization	32	33	63	65
Total operating expenses	86	94	179	187
OPERATING INCOME	18	30	53	78
OTHER INCOME (EXPENSE):
Interest expense, net	(11)	(12)	(23)	(25)
Interest income - affiliates	4	7	8	14
Other, net	2	(1)	1	0
INCOME BEFORE INCOME TAX EXPENSE	13	24	39	67
Income tax expense	5	9	17	21
NET INCOME	8	15	22	46
Comprehensive Income (Loss), Net of Tax, Attributable to Parent	$ 8	$ 15	$ 22	$ 46