STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net income	$ 368	$ 1,792	$ 432
Other comprehensive income (loss):
Adjustment to pension and other postretirement plans	(10)	6	(7)
Net deferred gain (loss) from cash flow hedges	(15)	(3)	1
Reclassification of deferred loss from cash flow hedges realized in net income (net of tax expense of $-0-, $-0-, and $1, respectively)	0	0	1
Other comprehensive income (loss)	(25)	3	(5)
Comprehensive income	343	1,795	427
Preferred stock dividend requirement	35	0	0
Comprehensive income	308	1,795	427
Houston Electric [Member]
Net income	336	433	276
Other comprehensive income (loss):
Net deferred gain (loss) from cash flow hedges	(14)	(1)	1
Other comprehensive income (loss)	(14)	(1)	1
Comprehensive income	322	432	277
CERC Corp [Member]
Net income	208	745	245
Other comprehensive income (loss):
Adjustment to pension and other postretirement plans	1	4	(6)
Net deferred gain (loss) from cash flow hedges	(1)	(1)	0
Other comprehensive income (loss)	0	3	(6)
Comprehensive income	$ 208	$ 748	$ 239