CONDENSED STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 6	$ 22	$ 126	$ 131
Other comprehensive income, net of tax:
Adjustment to pension and other postretirement plans (net of tax of $1, $-0-, $1 and $-0-)	1	0	1	0
Other comprehensive income	1	0	1	0
Comprehensive income	$ 7	$ 22	$ 127	$ 131