Consolidated Statement of Shareholder’s Equity - CECONY - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	CECONY	CECONY Common Stock	CECONY Additional Paid-In Capital	CECONY Retained Earnings	CECONY Repurchased Con Edison Stock	CECONY Capital Stock Expense	CECONY Accumulated Other Comprehensive Income (Loss)
BALANCE AS OF BEGINNING OF PERIOD (in shares) at Dec. 31, 2022		355,000,000					235,000,000
BALANCE AS OF BEGINNING OF PERIOD at Dec. 31, 2022						$ 16,878	$ 589	$ 7,419	$ 9,890	$ (962)	$ (62)	$ 4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
NET INCOME	$ 2,519					1,606			1,606
Common stock dividend to Con Edison	(1,127)			$ (1,127)		(1,056)			(1,056)
Capital contribution by Con Edison						1,720		1,720
Other comprehensive income (loss)						(2)						(2)
BALANCE AS OF END OF PERIOD (in shares) at Dec. 31, 2023		345,000,000					235,000,000
BALANCE AS OF END OF PERIOD at Dec. 31, 2023						19,146	$ 589	9,139	10,440	(962)	(62)	2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
NET INCOME	1,820					1,748			1,748
Common stock dividend to Con Edison	(1,149)			(1,149)		(1,073)			(1,073)
Capital contribution by Con Edison						130		130
Other comprehensive income (loss)	7				$ 7	8						8
Stock awards	$ 13		$ 13			$ 12		12
BALANCE AS OF END OF PERIOD (in shares) at Dec. 31, 2024	346,597,693	347,000,000				235,488,094	235,000,000
BALANCE AS OF END OF PERIOD 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	2,023					1,906			1,906
Common stock dividend to Con Edison	(1,214)			$ (1,214)		(1,134)			(1,134)
Capital contribution by Con Edison						1,300		1,316			(16)
Other comprehensive income (loss)	(14)				$ (14)	(13)						(13)
Stock awards	$ 8		$ 8			$ 7		7
BALANCE AS OF END OF PERIOD (in shares) at Dec. 31, 2025	361,121,447	361,000,000				235,488,094	235,000,000
BALANCE AS OF END OF PERIOD at Dec. 31, 2025	$ 24,190					$ 22,037	$ 589	$ 10,604	$ 11,887	$ (962)	$ (78)	$ (3)