STATEMENTS OF CONSOLIDATED COMPREHENSIVE INCOME - CERC - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net income (loss)	$ 1,486	$ (773)	$ 791
Other comprehensive income (loss):
Adjustment to pension and other postretirement plans	21	(5)	12
Net current period other comprehensive income (loss)	26	8	10
Comprehensive income (loss) available to common shareholders	1,417	(941)	684
CERC Corp
Net income (loss)	254	81	212
Other comprehensive income (loss):
Adjustment to pension and other postretirement plans	0	0	5
Net current period other comprehensive income (loss)	0	0	5
Comprehensive income (loss) available to common shareholders	$ 254	$ 81	$ 217