Consolidated Statement of Shareholder’s Equity - CECONY - USD ($) $ in Millions	Total	CECONY	Common Stock	Common Stock CECONY	Additional Paid-In Capital CECONY	Retained Earnings	Retained Earnings CECONY	Repurchased Con Edison Stock CECONY	Capital Stock Expense CECONY	Accumulated Other Comprehensive Income/(Loss)	Accumulated Other Comprehensive Income/(Loss) CECONY
BALANCE AS OF BEGINNING OF PERIOD (in shares) at Dec. 31, 2019			333,000,000	235,000,000
BALANCE AS OF BEGINNING OF PERIOD at Dec. 31, 2019		$ 14,147		$ 589	$ 5,669		$ 8,919	$ (962)	$ (62)		$ (6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
NET INCOME	$ 1,101	1,185					1,185
Common stock dividend to parent	(1,023)	(982)				$ (1,023)	(982)
Capital contribution by parent		500			500
Other comprehensive income	(6)	(1)								$ (6)	(1)
BALANCE AS OF END OF PERIOD (in shares) at Dec. 31, 2020			342,000,000	235,000,000
BALANCE AS OF END OF PERIOD at Dec. 31, 2020		14,849		$ 589	6,169		9,122	(962)	(62)		(7)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
NET INCOME	1,346	1,344					1,344
Common stock dividend to parent	(1,079)	(988)				(1,079)	(988)
Capital contribution by parent		1,100			1,100
Other comprehensive income	$ 30	$ 7								30	7
BALANCE AS OF END OF PERIOD (in shares) at Dec. 31, 2021	353,983,712	235,488,094	354,000,000	235,000,000
BALANCE AS OF END OF PERIOD at Dec. 31, 2021	$ 20,037	$ 16,312		$ 589	7,269		9,478	(962)	(62)		0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
NET INCOME	1,660	1,390					1,390
Common stock dividend to parent	(1,120)	(978)				$ (1,120)	(978)
Capital contribution by parent		150			150
Other comprehensive income	$ 17	$ 4								$ 17	4
BALANCE AS OF END OF PERIOD (in shares) at Dec. 31, 2022	354,962,058	235,488,094	355,000,000	235,000,000
BALANCE AS OF END OF PERIOD at Dec. 31, 2022	$ 20,687	$ 16,878		$ 589	$ 7,419		$ 9,890	$ (962)	$ (62)		$ 4