CONSOLIDATED STATEMENT OF SHAREHOLDER’S EQUITY (UNAUDITED) - CECONY - USD ($) shares in Millions, $ 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
Beginning balance (shares) at Dec. 31, 2022			355	235
Beginning Balance at Dec. 31, 2022		$ 16,878		$ 589	$ 7,419		$ 9,890	$ (962)	$ (62)		$ 4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	$ 1,433	604					604
Common stock dividend to Con Edison	(288)	(264)				$ (288)	(264)
Capital contribution by Con Edison		1,675			1,675
Other comprehensive income (loss)	4	(1)								$ 4	(1)
Ending balance (shares) at Mar. 31, 2023			346	235
Ending Balance at Mar. 31, 2023		18,892		$ 589	9,094		10,230	(962)	(62)		3
Beginning balance (shares) at Dec. 31, 2023			345	235
Beginning Balance at Dec. 31, 2023	21,158	19,146		$ 589	9,139		10,440	(962)	(62)		2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	720	694					694
Common stock dividend to Con Edison	(287)	(268)				$ (287)	(268)
Capital contribution by Con Edison		25			25
Other comprehensive income (loss)	(4)									$ (4)
Ending balance (shares) at Mar. 31, 2024			346	235
Ending Balance at Mar. 31, 2024	$ 21,615	$ 19,597		$ 589	$ 9,164		$ 10,866	$ (962)	$ (62)		$ 2