Income Tax (Tables)

3 Months Ended

Mar. 31, 2019

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, is as follows:

	Con Edison				CECONY
(% of Pre-tax income)	2019		2018		2019		2018
STATUTORY TAX RATE
Federal	21	%	21	%	21	%	21	%
Changes in computed taxes resulting from:
State income tax	5		4		6		5
Cost of removal	1		1		1		1
Other plant-related items	(1	)	—		—		(1	)
Renewable energy credits	(1	)	(1	)	—		—
Amortization of excess deferred federal income taxes	(4	)	(3	)	(4	)	(3	)
Other	(1	)	(1	)	(1	)	—
Effective tax rate	20	%	21	%	23	%	23	%