CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
OPERATING REVENUES	$ 299	$ 254	$ 900	$ 832
OPERATING EXPENSES
Operation and maintenance	24	31	82	83
General and administrative	31	36	92	131
Depreciation and amortization	42	40	125	118
Taxes other than income taxes	28	22	79	68
Other operating (income) and expenses — net	(1)	0	(2)	(1)
Total operating expenses	124	129	376	399
OPERATING INCOME	175	125	524	433
OTHER EXPENSES (INCOME)
Interest expense — net	56	56	164	158
Allowance for equity funds used during construction	(9)	(10)	(25)	(26)
Other income	(1)	0	(2)	(1)
Other expense	1	0	3	3
Total other expenses (income)	47	46	140	134
INCOME BEFORE INCOME TAXES	128	79	384	299
INCOME TAX PROVISION	46	28	141	109
NET INCOME	$ 82	$ 51	$ 243	$ 190