STATEMENTS OF CONSOLIDATED CHANGES IN EQUITY - HOUSTON ELECTRIC - USD ($) $ in Millions	Total	Common Stock	Additional Paid-in-Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Loss	Houston Electric	Houston Electric Common Stock	Houston Electric Additional Paid-in-Capital	Houston Electric Retained Earnings (Accumulated Deficit)	Houston Electric Accumulated Other Comprehensive Loss
Balance, beginning of year (in shares) at Dec. 31, 2019		502,000,000					1,000
Balance, end of year (in shares) at Dec. 31, 2020		551,000,000					1,000
Balance, beginning of year at Dec. 31, 2019		$ 5	$ 6,080	$ 632	$ (98)		$ 0	$ 2,486	$ 780	$ (15)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash contribution from parent								62
Other								0
Net income (loss)	$ (773)			(773)		$ 334			334
Dividend to parent									(551)
Other comprehensive income					8					15
Balance, end of year at Dec. 31, 2020	$ 8,348	$ 6	6,914	(845)	(90)	3,111	$ 0	2,548	563	0
Balance, end of year (in shares) at Dec. 31, 2021	628,923,534	629,000,000					1,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cash contribution from parent								130
Other								0
Net income (loss)	$ 1,486			1,486		381			381
Dividend to parent									0
Other comprehensive income					26					0
Balance, end of year at Dec. 31, 2021	$ 9,415	$ 6	8,529	154	(64)	3,622	$ 0	2,678	944	0
Balance, end of year (in shares) at Dec. 31, 2022	629,535,631	630,000,000					1,000
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Contribution from parent								38
Cash contribution from parent								1,143
Other								1
Net income (loss)	$ 1,057			1,057		510			510
Dividend to parent									(316)
Other comprehensive income					33					0
Balance, end of year at Dec. 31, 2022	$ 10,042	$ 6	$ 8,568	$ 709	$ (31)	$ 4,998	$ 0	$ 3,860	$ 1,138	$ 0