Common Equity Ratio, Percentage

No definition available.

Name:	ed_CommonEquityRatioPercentage
Namespace Prefix:	ed_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Public Utilities, Change in Requested Rate Increase (Decrease), Amount

+ References

No definition available.

+ Details

Name:	ed_PublicUtilitiesChangeInRequestedRateIncreaseDecreaseAmount
Namespace Prefix:	ed_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Public Utilities, Common Equity Ratio, Percentage

+ References

No definition available.

+ Details

Name:	ed_PublicUtilitiesCommonEquityRatioPercentage
Namespace Prefix:	ed_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Public Utilities, Infrastructure Investment Plan

+ References

No definition available.

+ Details

Name:	ed_PublicUtilitiesInfrastructureInvestmentPlan
Namespace Prefix:	ed_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Public Utilities, Recovery Of Late Payment Charges, Amount

+ References

No definition available.

+ Details

Name:	ed_PublicUtilitiesRecoveryOfLatePaymentChargesAmount
Namespace Prefix:	ed_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Public Utilities, Recovery Of Late Payment Charges, Recovery Period

+ References

No definition available.

+ Details

Name:	ed_PublicUtilitiesRecoveryOfLatePaymentChargesRecoveryPeriod
Namespace Prefix:	ed_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Public Utilities, Recovery Of Late Payment Charges, Return On Equity Threshold Rate

+ References

No definition available.

+ Details

Name:	ed_PublicUtilitiesRecoveryOfLatePaymentChargesReturnOnEquityThresholdRate
Namespace Prefix:	ed_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of public utility's approved return on equity.

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesApprovedReturnOnEquityPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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

- Definition

Amount of public utility's requested rate increase (decrease) with regulatory agency.

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesRequestedRateIncreaseDecreaseAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage of public utility's requested return on equity.

+ References

No definition available.

+ Details

Name:	us-gaap_PublicUtilitiesRequestedReturnOnEquityPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 28
-Subparagraph (f)
-URI https://asc.fasb.org/extlink&oid=123596393&loc=d3e14064-108612

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599

Reference 5: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 32
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599

Reference 6: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iv))
-URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756

Reference 7: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 22
-Subparagraph (b)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599

Reference 8: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(iv))
-URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756

Reference 9: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iii)(A))
-URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756

Reference 10: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9031-108599

Reference 11: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(i))
-URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756

Reference 12: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(i))
-URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756

Reference 13: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 30
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599

Reference 14: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(5))
-URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756

Reference 15: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 41
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9038-108599

Reference 16: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(iii)(A))
-URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756

Reference 17: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(5))
-URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756

Reference 18: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 42
-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599

Reference 19: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08(g)(1)(ii))
-URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690

Reference 20: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 235
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-05(b)(2))
-URI https://asc.fasb.org/extlink&oid=120399901&loc=d3e537907-122884

Reference 21: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1B
-Subparagraph (SX 210.13-02(a)(4)(iii)(B))
-URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442552-122756

Reference 22: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 10
-Section S99
-Paragraph 1A
-Subparagraph (SX 210.13-01(a)(4)(ii))
-URI https://asc.fasb.org/extlink&oid=126975872&loc=SL124442526-122756

Reference 23: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(1))
-URI https://asc.fasb.org/extlink&oid=126953954&loc=SL114868664-224227

+ Details

Name:	us-gaap_Revenues
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	srt_ConsolidatedEntitiesAxis=srt_SubsidiariesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=ed_ConsolidatedEdisonCompanyofNewYorkInc.Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilityAxis=us-gaap_ElectricTransmissionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongTermContractForPurchaseOfElectricPowerAxis=ed_RatePlanforYear1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongTermContractForPurchaseOfElectricPowerAxis=ed_RatePlanforYear2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongTermContractForPurchaseOfElectricPowerAxis=ed_RatePlanforYear3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilityAxis=us-gaap_GasTransmissionMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PublicUtilityAxis=ed_ElectricAndGasTransmissionProjectsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ed_RevenueProgramAxis=ed_EarningsAdjustmentMechanismsEAMsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=ed_OrangeAndRocklandUtilitiesIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongTermContractForPurchaseOfElectricPowerAxis=ed_LevelizedAnnualBasisMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=ed_RocklandElectricCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RegulatoryAgencyAxis=ed_NewJerseyBoardOfPublicUtilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Regulatory Matters - Rate Plans (Details) - USD ($) $ in Millions		1 Months Ended									3 Months Ended			6 Months Ended		12 Months Ended
	Dec. 31, 2021	Jan. 31, 2025	Jan. 31, 2024	Jan. 31, 2023	May 31, 2022	Apr. 30, 2022	Mar. 31, 2022	Jan. 31, 2022	Oct. 31, 2021	Jul. 31, 2021	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Dec. 31, 2021
Public Utilities, General Disclosures [Line Items]
Total revenues											$ 3,415.0		$ 2,971.0	$ 7,475.0	$ 6,648.0
Subsidiaries
Public Utilities, General Disclosures [Line Items]
Total revenues											$ 2,906.0		$ 2,486.0	$ 6,423.0	$ 5,692.0
CECONY \| Electric \| Subsidiaries
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount					$ 278.0
Common Equity Ratio, Percentage					48.00%
Return on common equity (as a percent)					8.80%
CECONY \| Electric \| Subsidiaries \| Year 1
Public Utilities, General Disclosures [Line Items]
Change in requested rate increase (decrease), amount						$ (161.0)
CECONY \| Electric \| Subsidiaries \| Year 1 \| Scenario, Forecast
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount				$ 1,038.0
CECONY \| Electric \| Subsidiaries \| Year 2
Public Utilities, General Disclosures [Line Items]
Change in requested rate increase (decrease), amount						(109.0)
CECONY \| Electric \| Subsidiaries \| Year 2 \| Scenario, Forecast
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount			$ 744.0
CECONY \| Electric \| Subsidiaries \| Year 3
Public Utilities, General Disclosures [Line Items]
Change in requested rate increase (decrease), amount						7.0
CECONY \| Electric \| Subsidiaries \| Year 3 \| Scenario, Forecast
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount		$ 615.0
CECONY \| Gas \| Subsidiaries
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount					$ 164.0
Common Equity Ratio, Percentage					48.00%
Return on common equity (as a percent)					8.80%
CECONY \| Gas \| Subsidiaries \| Year 1
Public Utilities, General Disclosures [Line Items]
Change in requested rate increase (decrease), amount						(101.0)
CECONY \| Gas \| Subsidiaries \| Year 1 \| Scenario, Forecast
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount				$ 402.0
CECONY \| Gas \| Subsidiaries \| Year 2
Public Utilities, General Disclosures [Line Items]
Change in requested rate increase (decrease), amount						(29.0)
CECONY \| Gas \| Subsidiaries \| Year 2 \| Scenario, Forecast
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount			$ 205.0
CECONY \| Gas \| Subsidiaries \| Year 3
Public Utilities, General Disclosures [Line Items]
Change in requested rate increase (decrease), amount						(42.0)
CECONY \| Gas \| Subsidiaries \| Year 3 \| Scenario, Forecast
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount		$ 176.0
CECONY \| Electric and Gas Transmission Projects \| Subsidiaries \| Earnings Adjustment Mechanisms (EAMs)
Public Utilities, General Disclosures [Line Items]
Total revenues												$ (4.5)				$ 92.0
O&R \| Electric \| Year 1
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount						4.9
O&R \| Electric \| Year 2
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount						16.2
O&R \| Electric \| Year 3
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount						23.1
O&R \| Electric \| Levelized Annual Basis
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount						11.7
O&R \| Gas \| Year 1
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount						0.7
O&R \| Gas \| Year 2
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount						7.4
O&R \| Gas \| Year 3
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount						9.9
O&R \| Gas \| Levelized Annual Basis
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount						$ 4.4
O&R \| Electric and Gas Transmission Projects
Public Utilities, General Disclosures [Line Items]
Recovery period of late payment charges									3 years
Recovery of late payment charges, amount									$ 2.8
Recovery of late payment charges, return on equity threshold rate									0.05%
RECO \| Electric
Public Utilities, General Disclosures [Line Items]
Requested rate increase (decrease), amount	$ 16.9							$ 20.4
Return on common equity (percent)								11.04%		0.50%
Common equity ratio percentage								47.00%
RECO \| NJBPU
Public Utilities, General Disclosures [Line Items]
Infrastructure investment plan							$ 209.0