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General (Details)	9 Months Ended
	Sep. 30, 2025 subsidiary registrant
Accounting Policies [Abstract]
Number of registrants | registrant	2
Number of regulated utility subsidiaries | subsidiary	2

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- Definition

Number Of Registrants

+ References

No definition available.

+ Details

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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

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- References

No definition available.

+ Details

Name:	us-gaap_AccountingPoliciesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration