XML 96 R77.htm IDEA: XBRL DOCUMENT
v3.22.4

Summary of Significant Accounting Policies and Other Matters - Pension and Other Postretirement Benefits (Details) | 12 Months Ended
--- | ---
Dec. 31, 2022
Accounting Policies [Abstract] |
Investment gains and losses recognized, time period (years) | 15 years
Other actuarial gains and losses recognized, time period (years) | 10 years
Difference between fair value and expected market related value of plan assets (percent) | 20.00%

X
- Definition Difference between fair value and expected market related value of plan assets + References No definition available. + Details
Name: | ed_DifferenceBetweenFairValueAndExpectedMarketRelatedValueOfPlanAssets
Namespace Prefix: | ed_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Pension actuarial gains and losses recognized time period. + References No definition available. + Details
Name: | ed_PensionActuarialGainsAndLossesRecognizedTimePeriod
Namespace Prefix: | ed_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Pension investment gains and losses recognized time period. + References No definition available. + Details
Name: | ed_PensionInvestmentGainsAndLossesRecognizedTimePeriod
Namespace Prefix: | ed_
Data Type: | xbrli:durationItemType
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