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, 2023			345	235
Beginning balance at Dec. 31, 2023		$ 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 loss	(4)									$ (4)
Ending balance (shares) at Mar. 31, 2024			346	235
Ending balance at Mar. 31, 2024		19,597		$ 589	9,164		10,866	(962)	(62)		2
Beginning balance (shares) at Dec. 31, 2024			347	235
Beginning balance at Dec. 31, 2024	21,962	19,971		$ 589	9,281		11,115	(962)	(62)		10
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	791	745					745
Common stock dividend to Con Edison	(295)	(284)				$ (295)	(284)
Capital contribution by Con Edison		1,225			1,241				(16)
Other comprehensive loss	(12)	(8)								$ (12)	(8)
Ending balance (shares) at Mar. 31, 2025			360	235
Ending balance at Mar. 31, 2025	$ 23,783	$ 21,649		$ 589	$ 10,522		$ 11,576	$ (962)	$ (78)		$ 2