CONDENSED STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net income (Loss)	$ 270	$ 158	$ 634	$ 248
Other comprehensive income (loss):
Adjustment to pension and other postretirement plans (net of tax of $-0-, $1, $2 and $2)	2	1	5	4
Net deferred gain (loss) from cash flow hedges (net of tax of $-0-, $1, $-0- and $2)	(2)	3	(3)	6
Reclassification of deferred loss from cash flow hedges realized in net income (net of tax of $-0-, $-0-, $-0- and $-0-)	0	0	1	0
Other comprehensive loss from unconsolidated affiliates (net of tax of $-0-, $-0-, $-0- and $-0-)	(2)	0	(2)	0
Total	(2)	4	1	10
Comprehensive income	268	162	635	258
Houston Electric [Member]
Net income (Loss)	185	143	312	296
Other comprehensive income (loss):
Net deferred gain (loss) from cash flow hedges (net of tax of $-0-, $1, $-0- and $2)	0	3	(1)	7
Total	0	3	(1)	7
Comprehensive income	185	146	311	303
CERC Corp [Member]
Net income (Loss)	(7)	9	159	175
Other comprehensive income (loss):
Total	0	0	0	0
Comprehensive income	$ (7)	$ 9	$ 159	$ 175