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	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, 2024			347	235
BALANCE AS OF BEGINNING OF PERIOD at Dec. 31, 2024		$ 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)
BALANCE AS OF END OF PERIOD (in shares) at Mar. 31, 2025			360	235
BALANCE AS OF END OF PERIOD at Mar. 31, 2025		$ 21,649		$ 589		10,522		11,576	(962)	(78)		2
BALANCE AS OF BEGINNING OF PERIOD (in shares) at Dec. 31, 2025	361	235	361	235
BALANCE AS OF BEGINNING OF PERIOD at Dec. 31, 2025	$ 24,190	$ 22,037		$ 589		10,604		11,887	(962)	(78)		(3)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	924	733						733
Common stock dividend to Con Edison	(320)	(309)					$ (320)	(309)
Capital contribution by Con Edison		981				988				(7)
Other comprehensive loss	(3)										$ (3)
Stock awards	2	$ 2			$ 2	2
BALANCE AS OF END OF PERIOD (in shares) at Mar. 31, 2026		235	368	235
BALANCE AS OF END OF PERIOD at Mar. 31, 2026	$ 25,596	$ 23,444		$ 589		$ 11,594		$ 12,311	$ (962)	$ (85)		$ (3)