Consolidated Statement of Shareholder’s Equity - CECONY - USD ($) $ 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	Accumulated Other Comprehensive Income CECONY
BALANCE AS OF BEGINNING OF PERIOD (in shares) at Dec. 31, 2021			354,000,000	235,000,000
BALANCE AS OF BEGINNING OF PERIOD at Dec. 31, 2021		$ 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 Con Edison	(1,120)	(978)					$ (1,120)	(978)
Capital contribution by Con Edison		150				150
Other comprehensive income (loss)	17	4									$ 17	4
BALANCE AS OF END OF PERIOD (in shares) at Dec. 31, 2022			355,000,000	235,000,000
BALANCE AS OF END 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)	(1,056)					(1,127)	(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	345,415,772	235,488,094	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)	(1,073)					$ (1,149)	(1,073)
Capital contribution by Con Edison		130				130
Other comprehensive income (loss)	7	8									$ 7	8
Stock Awards	$ 13	$ 12			$ 13	12
BALANCE AS OF END OF PERIOD (in shares) at Dec. 31, 2024	346,597,693	235,488,094	347,000,000	235,000,000
BALANCE AS OF END OF PERIOD at Dec. 31, 2024		$ 19,971		$ 589		$ 9,281		$ 11,115	$ (962)	$ (62)		$ 10