Condensed Statements of Consolidated Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net income (Loss)	$ 251	$ 105	$ 614	$ (1,094)
Other comprehensive income (loss):
Adjustment to pension and other postretirement plans (net of tax of $1, $1, $1 and $2)	1	1	3	2
Reclassification of net deferred losses from cash flow hedges (net of tax of $-0-, $4, $-0- and $4)	0	15	0	15
Other comprehensive income (loss) from unconsolidated affiliates (net of tax of $-0-, $-0-, $-0- and $-0-)	1	0	2	(3)
Total	2	16	5	14
Comprehensive income (loss)	253	121	619	(1,080)
Income allocated to preferred shareholders	30	46	59	75
Comprehensive income (loss) available to common shareholders	223	75	560	(1,155)
Houston Electric
Net income (Loss)	103	87	156	120
Other comprehensive income (loss):
Reclassification of net deferred losses from cash flow hedges (net of tax of $-0-, $4, $-0- and $4)	0	15	0	15
Total	0	15	0	15
Comprehensive income (loss) available to common shareholders	103	102	156	135
CERC Corp
Net income (Loss)	58	13	209	80
Other comprehensive income (loss):
Total	0	0	0	0
Comprehensive income (loss) available to common shareholders	$ 58	$ 13	$ 209	$ 80