CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
OPERATING REVENUES	$ 303	$ 298	$ 601	$ 578
OPERATING EXPENSES
Operation and maintenance	29	27	58	52
General and administrative	30	49	61	95
Depreciation and amortization	42	39	83	78
Taxes other than income taxes	27	23	51	46
Other operating (income) and expenses — net	1	1	1	1
Total operating expenses	127	137	252	270
OPERATING INCOME	176	161	349	308
OTHER EXPENSES (INCOME)
Interest expense — net	55	52	108	102
Allowance for equity funds used during construction	(8)	(8)	(16)	(16)
Other income	1	1	1	1
Other expense	1	2	2	3
Total other expenses (income)	47	45	93	88
INCOME BEFORE INCOME TAXES	129	116	256	220
INCOME TAX PROVISION	48	42	95	81
NET INCOME	$ 81	$ 74	$ 161	$ 139