XML 45 R41.htm IDEA: XBRL DOCUMENT
v3.20.1

General (Details) | 3 Months Ended
--- | ---
Mar. 31, 2020 subsidiary registrant
Accounting Policies [Abstract] |
Number of registrants | registrant | 2
Number of regulated utility subsidiaries | subsidiary | 2

X
- Definition Number of Registrants + References No definition available. + Details
Name: | ed_NumberofRegistrants
Namespace Prefix: | ed_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of Regulated Utility Subsidiaries + References No definition available. + Details
Name: | ed_NumberofRegulatedUtilitySubsidiaries
Namespace Prefix: | ed_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration