Income Tax (Tables)

3 Months Ended

Mar. 31, 2021

Income Tax Disclosure [Abstract]

Schedule of Income Tax Reconciliation

Reconciliation of the difference between income tax expense and the amount computed by applying the prevailing statutory income tax rate to income before income taxes for the three months ended March 31, 2021 and 2020 is as follows:

	Con Edison				CECONY
(% of Pre-tax income)	2021		2020		2021		2020
STATUTORY TAX RATE
Federal	21	%	21	%	21	%	21	%
Changes in computed taxes resulting from:
State income tax	4		4		5		5
Amortization of excess deferred federal income taxes	(9)		(9)		(7)		(8)
Taxes attributable to non-controlling interests	—		(1)		—		—
Cost of removal	2		2		1		2
Other plant-related items	(1)		(1)		—		(1)
Renewable energy credits	(1)		(2)		—		—
CARES Act NOL carryback	—		(1)		—		—
Other	—		(1)		—		—
Effective tax rate	16	%	12	%	20	%	19	%