Dispositions	3 Months Ended
Mar. 31, 2021
Discontinued Operations and Disposal Groups [Abstract]
Dispositions	DispositionsIn April 2021, a subsidiary of the Clean Energy Businesses entered into an agreement to sell substantially all of its membership interests in one operating project that it developed and all of its membership interests in a second operating project that it acquired in 2016. The combined carrying value of both projects is approximately $200 million as of March 31, 2021. The closing of the sales, which are expected to occur by the end of the second quarter of 2021, are subject to certain regulatory approvals by FERC and the satisfaction of other closing conditions, and are not expected to have a material impact on Con Edison’s results of operations.

The entire disclosure related to a disposal group. Includes, but is not limited to, a discontinued operation, disposal classified as held-for-sale or disposed of by means other than sale or disposal of an individually significant component.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-URI http://asc.fasb.org/topic&trid=2155823

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
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