Revision of Prior Period [Axis] Revision of Prior Period [Axis] Period [Axis] Period [Axis] Period [Axis] Accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization COVID-19 pandemic deferrals COVID-19 Pandemic Deferrals [Member] COVID-19 Pandemic Deferrals TOTAL CAPITALIZATION Capitalization, Long-Term Debt and Equity Investments Investment, Policy [Policy Text Block] Commodity Commodity Contract [Member] Accrued taxes to affiliated companies Taxes Payable, Related Parties, Current Taxes Payable, Related Parties, Current Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets AFUDC rates (percent) Public Utilities, Allowance for Funds Used During Construction, Rate Schedule of Expected Benefit Payments Schedule of Expected Benefit Payments [Table Text Block] Asset retirement obligation, period reductions Asset Retirement Obligation, Period Increase (Decrease) Award Timing Predetermined Award Timing Predetermined [Flag] Refined Fuels Refined Fuels [Member] Refined fuels. Astoria Generating Company Astoria Generating Company [Member] Astoria Generating Company [Member] Entity File Number Entity File Number Additional Paid-In Capital Additional Paid-In Capital Additional Paid-in Capital [Member] Tax Credits Effective Income Tax Rate Reconciliation, Tax Credit, Amount Pensions and retiree benefits - liability Deferred Tax Assets, Pensions And Retiree Benefits Deferred Tax Assets, Pensions And Retiree Benefits UB deferral for uncollectible accounts receivable COVID-19 Deferral For Uncollectible Accounts Receivable [Member] COVID-19 Deferral For Uncollectible Accounts Receivable Tabular List, Table Tabular List [Table Text Block] Target Allocation Range (percent) Defined Benefit Plan, Plan Assets, Target Allocation, Percentage Outstanding loans Outstanding Loan Outstanding Loan New Financial Accounting Standards New Accounting Pronouncements, Policy [Policy Text Block] Over Seven To Fifteen Years Seven To Fifteen Years [Member] Seven To Fifteen Years Schedule of Costs of Administrative and Other Services Provided and Received Schedule of Related Party Transactions [Table Text Block] Fair Value Measurements Fair Value Measurement and Measurement Inputs, Recurring and Nonrecurring [Text Block] Proceeds from sale of Broken Bow II, net of cash and cash equivalents sold Proceeds from sale and net of cash and cash equivalents sold Proceeds from Divestiture of Businesses, Net of Cash Divested Capital expenditures in accounts payable Capital expenditures in accounts payable Construction in Progress Expenditures Incurred but Not yet Paid Guarantee obligations maximum exposure Total guarantees, by type and term Guarantor Obligations, Maximum Exposure, Undiscounted Deferred derivative gains - long term Deferred Derivative Gains - Long Term [Member] Deferred Derivative Gains - Long Term R&D credit and ITC amortization Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount Goodwill [Line Items] Goodwill [Line Items] Other regulatory liabilities Deferred Tax Assets, Regulatory Assets And Liabilities, Other Deferred Tax Assets, Regulatory Assets And Liabilities, Other Debenture 2013A, 3.95%, Due 2043 Debenture 2013A, 3.95 Percent, Due 2043 [Member] Debenture 2013A, 3.95 Percent, Due 2043 [Member] Condensed Cash Flow Statement [Table] Condensed Cash Flow Statement [Table] Decrease in liability for other postretirement benefits Increase (Decrease) in Obligation, Other Postretirement Benefits Measurement Basis [Axis] Measurement Basis [Axis] Regulatory reconciliations Deferred Tax Liabilities, Regulatory Assets and Liabilities Gas Gas Oil and Gas, Purchased [Member] Adjustment to Compensation: Adjustment to Compensation [Axis] Covenant principal balance amount limit Covenant Principal Balance Amount Limit Covenant principal balance amount limit Related Party Transactions Related Party Transactions Disclosure [Text Block] Debenture Series 2015B, 4.69% due 2045 Debenture Series 2015B, 4.69% due 2045 [Member] Debenture Series 2015B, 4.69% due 2045 [Member] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Public utilities, annual gas revenue requirement amount Public Utilities, Annual Gas Revenue Requirement Amount Public Utilities, Annual Gas Revenue Requirement Amount Catastrophic Event [Axis] Catastrophic Event [Axis] Revenue Recognition Revenue from Contract with Customer [Text Block] Regulatory Matters Electricity and Gas Purchase Agreements Public Utilities Disclosure [Text Block] Gas Public Utilities, Property, Plant and Equipment, Fuel Energy Storage Energy Storage [Member] Energy Storage Schedule of Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Pensions and retiree benefits contributions Payment for Pension and Other Postretirement Benefits TOTAL ASSETS Disposal Group, Including Discontinued Operation, Assets Other deferred charges and noncurrent assets Other deferred charges and noncurrent assets Other Assets, Miscellaneous, Noncurrent Adjustment to Compensation, Amount Adjustment to Compensation Amount Factor used for adjustment of Performance awards, high end (in percent) Share Based Compensation Arrangement By Share Based Payment Award Performance Rsu S Factor Used High Range Share-based Compensation Arrangement by Share-based Payment Award, Performance RSU's, Factor used, high range Pension Benefits Pension Plan [Member] Unamortized debt discount Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net Principles of Consolidation Consolidation, Policy [Policy Text Block] Amortizations to income of net regulatory (assets) and liabilities Utilities Operating Expense, Depreciation and Amortization Total Shareholder's Equity (See Consolidated Statement of Shareholder’s Equity) Common stock, including additional paid-in capital Common Stock Equity Total value of common stock equity Employee Stock Option Share-Based Payment Arrangement, Option [Member] All Years Thereafter Contractual Obligation, to be Paid, after Year Five Temporary Cash Investments Cash and Cash Equivalents, Policy [Policy Text Block] Broken Bow II Broken Bow II [Member] Broken Bow II [Member] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Percent Effective Income Tax Rate Reconciliation, Percent [Abstract] Deferred tax assets, tax deferred expense Deferred Tax Assets, Tax Deferred Expense 0 – 3 years Guarantee Duration One To Three Years [Member] Guarantee Duration One To Three Years [Member] Ultimate Cost Trend Rate Defined Benefit Plan, Ultimate Health Care Cost Trend Rate Debenture Series 2018A, 4.35% Due 2048 Debenture Series 2018A, 4.350% Due 2048 [Member] Debenture Series 2018A, 4.350% Due 2048 [Member] Total Shareholders’ Equity BALANCE AS OF BEGINNING OF PERIOD BALANCE AS OF END OF PERIOD Net assets Equity, Attributable to Parent Measurement Frequency [Axis] Measurement Frequency [Axis] OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES Other Comprehensive Income (Loss), Net of Tax [Abstract] Insider Trading Policies and Procedures [Line Items] New York NEW YORK Common stock, shares authorized (in shares) Common Stock, Shares Authorized Debenture 2024E, 5.50% Due 2055 Debenture 2024E , 5.50%, Due 2055 [Member] Debenture 2024E , 5.50%, Due 2055 Issuance of common shares - public offering (in shares) Stock Issued During Period, Shares, New Issues Total deferred gains (losses) Deferred Derivative Gains Losses Deferred Derivative Gains Losses Trend Rates [Domain] Trend Rates [Domain] Trend Rates [Domain] Defer incremental preparation costs Deferred Storm and Property Reserve Deficiency, Current Recurring Fair Value, Recurring [Member] LIABILITIES AND SHAREHOLDERS’ EQUITY LIABILITIES AND SHAREHOLDER’S EQUITY Liabilities and Shareholders’ Equity Liabilities and Equity [Abstract] State State and Local Jurisdiction [Member] Allowance for uncollectible accounts, net of regulatory recovery Effective Income Tax Rate Reconciliation, Change in Allowance For Uncollectible Accounts, Percent Effective Income Tax Rate Reconciliation, Change in Allowance For Uncollectible Accounts, Percent Solar project term Solar Project Term Solar Project Term Cover [Abstract] Cover [Abstract] Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Dispositions Held-for-Sale Treatment of the Clean Energy Businesses Disposal Groups, Including Discontinued Operations, Disclosure [Text Block] Maximum Maximum Maximum [Member] NON-UTILITY PLANT NON-UTILITY PROPERTY Property, Plant and Equipment, Net [Abstract] Loss attributable to non-controlling interest LOSS ATTRIBUTABLE TO NON-CONTROLLING INTEREST Net Income (Loss) Attributable to Noncontrolling Interest Rate of compensation increase (in percent) Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase Issuance of common shares for stock plans (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, before Forfeiture Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Public Utility, Property, Plant and Equipment [Table] Public Utility, Property, Plant and Equipment [Table] CET Electric Consolidated Edison Transmission Electric [Member] Consolidated Edison Transmission Electric [Member] Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Makeup of net credit exposure with investment-grade counterparties Maximum Potential Future Exposure On Credit Risk Derivatives With Investment Grade Counterparties Maximum Potential Future Exposure On Credit Risk Derivatives With Investment Grade Counterparties Debt Instrument [Line Items] Debt Instrument [Line Items] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] March 2022 Credit Agreement Variable Rate 364 Day Revolving Credit Agreement March 2022 Credit Agreement Variable Rate 364 Day Revolving Credit Agreement [Member] March 2022 Credit Agreement Variable Rate 364 Day Revolving Credit Agreement Surcharge recovery threshold percentage Surcharge Recovery Threshold Percentage Surcharge Recovery Threshold Percentage Retirement Benefits [Abstract] Retirement Benefits [Abstract] Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Base rate changes Public Utilities, Property, Plant and Equipment, Rate Base Adjustments Public Utilities, Property, Plant and Equipment, Rate Base Adjustments TOTAL NONCURRENT LIABILITIES Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent Protected Portion Protected Portion [Member] Protected Portion [Member] INCOME BEFORE INCOME TAX EXPENSE Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Environmental Remediation Site [Domain] Environmental Remediation Site [Domain] Schedule of Carrying Amounts and Fair Values of Long-Term Debt Schedule of Carrying Values and Estimated Fair Values of Debt Instruments [Table Text Block] Tax Exempt Debt Series 2004C, 3.47% Due 2039 Tax Exempt Debt Series 2004C Due 2039 [Member] Tax Exempt Debt Series 2004C Due 2039 [Member] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Statement of Financial Position Location, Activity, Accrual [Axis] Statement of Financial Position Location, Activity, Accrual [Axis] Regulatory Assets [Line Items] Regulatory Asset [Line Items] Unbilled revenue and net unbilled revenue deferrals Contract with Customer, Liability, Unbilled Revenue Accruals And Deferrals Contract with Customer, Liability, Unbilled Revenue Accruals And Deferrals Capacity Electric Capacity Derivative [Member] Electric Capacity Derivative [Member] Natural gas Natural Gas [Member] Natural Gas Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Operating Segments Operating segment Operating Segments [Member] Schedule of Cash Paid for Income Taxes Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Operating lease right-of-use asset Deferred Tax Liabilities, Operating Lease Right Of Use Asset Deferred Tax Liabilities, Operating Lease Right Of Use Asset Letters of Credit Letter of Credit [Member] Distribution to noncontrolling interest Payments to Noncontrolling Interests Regulated Operation, Regulatory Liability [Table] Regulated Operation, Regulatory Liability [Table] Other receivables, net allowance for uncollectible accounts of $35 and $41 in 2025 and 2024, respectively Other receivables, net allowance for uncollectible accounts of $27 and $38 in 2025 and 2024, respectively Other Receivables Operating lease liabilities Operating lease liabilities Operating lease liabilities (current) Operating Lease, Liability, Current UTILITY PLANT, AT ORIGINAL COST Public Utilities, Property, Plant and Equipment, Transmission and Distribution Document Fiscal Period Focus Document Fiscal Period Focus Rate of compensation increase (percent) Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase Derivatives, Fair Value [Line Items] Derivatives, Fair Value [Line Items] Award Timing Method Award Timing Method [Text Block] Litigation Case [Domain] Litigation Case [Domain] Cost capitalized Defined Benefit Plan Cost Capitalized Defined Benefit Plan Cost Capitalized Award Type [Axis] Award Type [Axis] Non-NY State Income taxes related to the Clean Energy Businesses, net of federal income taxes Effective Income Tax Rate Reconciliation, Non NY State Taxes Related To The Clean Energy Businesses, Net Of Federal Income Taxes, Percent Effective Income Tax Rate Reconciliation, Non NY State Taxes Related To The Clean Energy Businesses, Net Of Federal Income Taxes, Percent Parent Company Parent Company [Member] Utility Plant [Domain] Utility Plant [Domain] Period of sale of limited partnership interests in secondary market (in years) Period Of Sale Of Partnership Interests In Secondary Market Period Of Sale Of Partnership Interests In Secondary Market Investment, Name [Domain] Investment, Name [Domain] Trading Symbol Trading Symbol Schedule of Capitalization [Line Items] Schedule of Capitalization [Line Items] General Electric General [Member] Electric General [Member] Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Number of regulated subsidiaries Number of Regulated Subsidiaries Number of Regulated Subsidiaries Environmental Remediation Obligations [Abstract] Environmental Remediation Obligations [Abstract] Entity Address, City or Town Entity Address, City or Town Regulatory Liabilities Current Regulatory Liabilities Current [Member] Regulatory Liabilities Current TOTAL Public Utilities, Property, Plant and Equipment, Plant in Service 2030 Lessee, Operating Lease, Liability, to be Paid, Rolling Year Five Weighted Average Discount Rate, Finance leases (percent) Finance Lease, Weighted Average Discount Rate, Percent Settlement of prudence proceeding Prudence Proceeding [Member] Prudence Proceeding [Member] Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] Asset Retirement Obligation, Roll Forward Analysis [Roll Forward] Total deferred tax assets Deferred Tax Assets, Net of Valuation Allowance Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Net issuance (payment) of short-term debt Proceeds from (Repayments of) Short-Term Debt Restricted Stock Units Restricted Stock Units (RSUs) [Member] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Settlements Unrecognized Tax Benefits, Decrease Resulting from Settlements with Taxing Authorities Regulatory Agency [Axis] Regulatory Agency [Axis] Entity Emerging Growth Company Entity Emerging Growth Company 2028 Long-Term Debt, Maturity, Year Three Distribution Distribution [Member] Distribution [Member] Weighted Average Remaining Lease Term, Finance leases (in years) Finance Lease, Weighted Average Remaining Lease Term Schedule I - Condensed Financial Information Condensed Financial Information of Parent Company Only Disclosure [Text Block] Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Unamortized debt expense Debt Issuance Costs, Net Restricted cash Restricted Cash and Cash Equivalent 2026 Defined Benefit Plan, Expected Future Benefit Payment, Year One Unrealized losses on derivatives qualified as cash flow hedges, less reclassification adjustment for gains (losses) included in net income and reclassification adjustment for unrealized losses included in regulatory assets, net of taxes Unrealized losses on derivatives qualified as cash flow hedges, less reclassification adjustment for gains (losses) included in net income and reclassification adjustment for unrealized losses included in regulatory assets, net of taxes Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax And Reclassification Adjustment Accumulated Other Comprehensive Income Loss Cumulative Changes In Net Gain Loss From Cash Flow Hedges Effect Net Of Tax And Reclassification Adjustment Funds For Retiree Health Benefits Funds For Retiree Health Benefits [Member] Funds For Retiree Health Benefits Less: imputed interest Finance Lease, Liability, Undiscounted Excess Amount Add: Incremental shares attributable to effect of potentially dilutive securities (in shares) Incremental Common Shares Attributable to Dilutive Effect of Contingently Issuable Shares Common stock, shares outstanding (in shares) BALANCE AS OF BEGINNING OF PERIOD (in shares) BALANCE AS OF END OF PERIOD (in shares) Common Stock, Shares, Outstanding Employer group waiver plan subsidies Defined Benefit Plan Employer Group Waiver Plan Payments Defined Benefit Plan Employer Group Waiver Plan Payments Deferred regulatory asset (liability) Deferred Regulatory Asset (Liability) Deferred Regulatory Asset (Liability) Reserve adjustments Accounts Receivable, Credit Loss Expense (Reversal) Amortization of excess deferred federal income taxes Effective Income Tax Rate Reconciliation, Deductible Expense Amortization Of Excess Deferred Income Taxes, Percent Effective Income Tax Rate Reconciliation, Deductible Expense Amortization Of Excess Deferred Income Taxes, Percent Year 9 Rate Plan For Year 9 [Member] Rate Plan For Year 9 Schedule of Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] Pension and retiree benefits Pension and retiree benefits Pension and retiree benefits - asset Assets for Plan Benefits, Defined Benefit Plan Term loan Term Loan Loans Payable to Bank, Current INCOME BEFORE INTEREST AND INCOME TAX EXPENSE INCOME BEFORE INTEREST AND INCOME TAX EXPENSE Income Before Interest Income Interest Expense And Income Taxes Income before interest income, interest expense and income taxes Advanced metering infrastructure (AMI) Advanced Metering Infrastructure Costs [Member] Purchased power Purchased power Electricity, Purchased [Member] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] CHANGE IN PROJECTED BENEFIT OBLIGATION CHANGE IN BENEFIT OBLIGATION Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Develop/Transfer Projects Develop/Transfer Project [Member] Develop/Transfer Project Units Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date INCOME TAX EXPENSE Total income tax expense Income tax benefit (expense) Income Tax Expense (Benefit) Debt instrument, SOFR variable rate Debt Instrument, Basis Spread on Variable Rate TOTAL PROJECT DEBT All Projects [Member] All Projects [Member] Document Information [Line Items] Document Information [Line Items] Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Related Party, Lending of Funds Related Party, Lending of Funds [Member] Related Party, Lending of Funds [Member] Subsegments [Axis] Subsegments [Axis] Subsegments Consolidation Items [Domain] Subsegments Consolidation Items [Domain] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Year 8 Rate Plan For Year 8 [Member] Rate Plan For Year 8 Weighted average cost of capital (after-tax) Weighted Average Cost Of Capital Weighted Average Cost Of Capital Number of reportable segments not disclosed flag Number Of Reportable Segments Not Disclosed Flag Number Of Reportable Segments Not Disclosed Flag Pre-tax gains (losses) deferred in accordance with accounting rules for regulated operations: Derivative Assets Liabilities At Fair Value By Balance Sheet Classification [Abstract] Derivative Assets Liabilities At Fair Value By Balance Sheet Classification [Abstract] Discontinued Operations and Disposal Groups [Abstract] Other receivables, less allowance for uncollectible accounts Other receivables, net allowance for uncollectible accounts Allowance for Credit Loss, Receivable, Other, Current Condensed Cash Flow Statements, Captions [Line Items] Condensed Cash Flow Statements, Captions [Line Items] Stock Purchase Plan Stock Purchase Plan [Member] Stock Purchase Plan [Member] Employer contribution to the defined savings plan Defined Contribution Plan, Employer Discretionary Contribution Amount Guarantor Obligation [Table] Guarantor Obligation [Table] Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Federal Income Tax Paid, Federal, after Refund Received All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] 2028 Finance Lease, Liability, to be Paid, Rolling Year Three Other Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Deferred tax liabilities: Deferred Tax Liabilities, Gross [Abstract] Non-vested at beginning of period (in shares) Non-vested at end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Requested rate increase (decrease), amount Public Utilities, Requested Rate Increase (Decrease), Amount Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Earnings sharing Revenue Requirement Earnings Percentage Revenue Requirement Earnings Percentage NET CASH FLOWS FROM OPERATING ACTIVITIES NET CASH FLOWS FROM OPERATING ACTIVITIES Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Accumulated depreciation, other deferred charges and noncurrent assets and prepayments Accumulated Depreciation, Other Deferred Charges And Noncurrent Assets And Prepayments Accumulated Depreciation, Other Deferred Charges And Noncurrent Assets And Prepayments Net payment of short-term debt (Maturities 90 days or less) Net payment of short-term debt (Maturities 90 days or less) Repayments of Short-Term Debt Operating lease liabilities Deferred Tax Liabilities, Operating Lease Liabilities Deferred Tax Liabilities, Operating Lease Liabilities INVESTMENTS INVESTMENTS Investments in subsidiaries and others Long-Term Investments Debt term (in years) Debt Instrument, Term Equity Method Investments and Joint Ventures [Abstract] Equity Method Investments and Joint Ventures [Abstract] Deferred unamortized ITC recognized on sale of subsidiary  Effective Income Tax Rate Reconciliation, State Taxes On Sale Of Subsidiary, Amount Effective Income Tax Rate Reconciliation, State Taxes On Sale Of Subsidiary, Amount Estimated useful lives (years) Property, Plant and Equipment, Useful Life Subsequent Event Subsequent Event [Member] Schedule of Assumptions Used to Calculate Fair Value of Awards Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Schedule of Equity Method Investments [Line Items] Schedule of Equity Method Investments [Line Items] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] PEO Total Compensation Amount PEO Total Compensation Amount Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Gross Amounts of Recognized Assets/ (Liabilities) Derivative Liability, Subject to Master Netting Arrangement, before Offset Debenture 2019B, 3.70%, Due 2059 Debenture 2019B, 3.70 Percent, Due 2059 [Member] Debenture 2019B, 3.70 Percent, Due 2059 [Member] Equity Components [Axis] Equity Components [Axis] Future income tax Deferred Tax Assets, Regulatory Assets And Liabilities, Future Income Tax Deferred Tax Assets, Regulatory Assets And Liabilities, Future Income Tax Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Accounts receivable - customers Trade Accounts Receivable [Member] Dividend to Con Edison Payments of Ordinary Dividends Long-term Contract for Purchase of Electric Power [Line Items] Long-Term Contract for Purchase of Electric Power [Line Items] Fair Value, Concentration of Risk, Disclosure Items [Domain] Fair Value, Concentration of Risk, Disclosure Items [Domain] Lease Expected To Commence In 3 Years With 15 Year Lease Term Lease Expected To Commence In 3 Years With 15 Year Lease Term [Member] Lease Expected To Commence In 3 Years With 15 Year Lease Term Treasury stock, par value (in dollars per share) Treasury Stock, Par or Stated Value Per Share Treasury Stock, Par or Stated Value Per Share Gas transportation and storage Gas Transportation And Storage [Member] Gas Transportation And Storage Variable Interest Entities Variable Interest Entity Disclosure [Text Block] Regulatory liabilities Regulatory liabilities – noncurrent Regulatory Liability, Noncurrent Entity Address, State or Province Entity Address, State or Province Finance lease costs and cash flows Finance Lease, Principal Payments TOTAL OTHER NONCURRENT ASSETS Disposal Group, Including Discontinued Operation, Assets, Noncurrent Transmission Congestion Contracts Transmission Congestion Contracts [Member] Transmission Congestion Contracts [Member] Common stock dividends Common stock dividend to Con Edison Dividends, Common Stock 2029 Defined Benefit Plan, Expected Future Benefit Payment, Year Four Regulatory liabilities: Regulatory Liability [Abstract] TOTAL CURRENT LIABILITIES Current liabilities Liabilities, Current Deferred charges, noncurrent assets, leases, net and other regulatory assets Increase (Decrease) in Deferred Charges Individual: Individual [Axis] Other Postretirement Benefits Postemployment Benefits Disclosure [Text Block] MTA power reliability deferral MTA Power Reliability Deferral [Member] MTA Power Reliability Deferral [Member] Other receivables, net and other current assets Other receivables, net and other current assets Increase (Decrease) in Other Receivables Income Tax Jurisdiction [Domain] Income Tax Jurisdiction [Domain] Authorized return on common equity Public Utilities, Approved Return on Equity, Percentage System benefit charge System benefit charge System Benefits Charge Liability, Current System Benefits Charge Liability, Current Accounting Changes and Error Corrections [Abstract] Accounting Changes and Error Corrections [Abstract] Common stock dividends Common stock dividends Payments of Ordinary Dividends, Common Stock Document Annual Report Document Annual Report Rate case amortization and accruals Rate case amortization and accruals Amortization Cash and Cash Equivalents Defined Benefit Plan, Cash and Cash Equivalents [Member] Project [Domain] Project [Domain] Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Retirement of long-term debt Repayments of Long-Term Debt Environmental Remediation Contingency [Axis] Environmental Remediation Contingency [Axis] Entity Interactive Data Current Entity Interactive Data Current Debenture Series 2018B, 4.50% Due 2058 Debenture Series 2018B, 4.500% Due 2058 [Member] Debenture Series 2018B, 4.500% Due 2058 [Member] Catastrophic Event [Domain] Catastrophic Event [Domain] Mutual Fund Mutual Fund [Member] Interest crediting rate for cash balance plan (percent) Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Weighted-Average Interest Crediting Rate Condensed Income Statement [Table] Condensed Income Statement [Table] Loss from the project, pre-tax Income (Loss) From Equity Method Investments, Hypothetical Liquidation At Book Value, Before Tax Income (Loss) From Equity Method Investments, Hypothetical Liquidation At Book Value, Before Tax Electricity power purchase agreements Electricity Power Purchase Agreements [Member] Electricity Power Purchase Agreements FUNDED STATUS FUNDED STATUS Defined Benefit Plan, Funded (Unfunded) Status of Plan Revenues Revenue from Contract with Customer [Policy Text Block] Lending period (not more than) (months) Lending Period Lending Period Schedule of Stock-Based Compensation Expense Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Net derivatives losses Gain (Loss) on Sale of Derivatives Loss carryforwards Deferred Tax Assets, Operating Loss Carryforwards Debenture Series 2004B, 5.70% Due 2034 Debenture Series Two Thousand Four B Five Point Seven Zero Percent Due Two Thousand Thirty Four [Member] Debenture Series Two Thousand Four B Five Point Seven Zero Percent Due Two Thousand Thirty Four [Member] Current Expected Credit Losses Allowance for Credit Losses [Text Block] Capital contribution by Con Edison Proceeds from Contributions from Parent Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Consolidated Edison Company of New York, Inc. And Orange And Rockland Utilities, Inc. Consolidated Edison Company of New York, Inc. And Orange And Rockland Utilities, Inc. [Member] Consolidated Edison Company of New York, Inc. And Orange And Rockland Utilities, Inc. Year 3 Rate Plan for Year 3 [Member] Rate Plan for Year 3 [Member] Ownership [Domain] Ownership [Domain] Total Operating Lease, Liability, Including Held-For Sale Operating Lease, Liability, Including Held-For Sale Debenture 2024E, 5.50%, Due 2055 Debenture 2024E, 5.50 Percent, Due 2055 [Member] Debenture 2024E, 5.50 Percent, Due 2055 Potential positive rate adjustment for gas safety and performance Potential Positive Rate Adjustment Gas Safety And Performance Revenue Potential Positive Rate Adjustment Gas Safety And Performance Revenue Debenture Series 2006B, 6.20% Due 2036 Debenture Series Two Thousand Six B Six Point Two Zero Percent Due Two Thousand Thirty Six [Member] Debenture Series Two Thousand Six B Six Point Two Zero Percent Due Two Thousand Thirty Six [Member] Capacity, energy and other fixed payments Long-term Contract for Purchase of Capacity and Energy, Amount of Fixed Payments Long-term Contract for Purchase of Capacity and Energy, Amount of Fixed Payments Operating lease, lease not yet commenced, expected period to commence (in years) Lessee, Operating Lease, Lease Not Yet Commenced, Expected Period To Commence Lessee, Operating Lease, Lease Not Yet Commenced, Expected Period To Commence 2027 Defined Benefit Plan, Expected Future Benefit Payment, Year Two TOTAL OTHER NONCURRENT ASSETS Other deferred charges and noncurrent assets Other Assets, Noncurrent Customer [Domain] Customer [Domain] Accrued interest Accrued interest Interest Payable, Current Entity Central Index Key Entity Central Index Key Energy supply and hedging activities credit exposure total Credit Derivative, Maximum Exposure, Undiscounted PEO Name PEO Name Beginning Balance as of January 1, Ending Balance as of December 31, Asset Retirement Obligation TOTAL OPERATING REVENUES Positive incentives Total operating revenues Revenues Energy efficiency and other clean energy programs Deferred Tax Liabilities, Energy Efficiency Programs And Energy Programs Deferred Tax Liabilities, Energy Efficiency Programs And Energy Programs Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Debenture Series 2017B, 3.125% Due 2027 Debenture Series Two Thousand Seventeen B Three Point One Two Five Percent Due Two Thousand Twenty Seven [Member] Debenture Series Two Thousand Seventeen B Three Point One Two Five Percent Due Two Thousand Twenty Seven [Member] Contributions to subsidiaries Payments to Acquire Interest in Subsidiaries and Affiliates Regulatory Liabilities [Line Items] Regulatory Liability [Line Items] Net utility plant reconciliations Average Net Utility Plant Rates Deferred regulatory asset (liability) Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Futures Defined Benefit Plan, Derivative [Member] Defined Benefit Plan [Table] Defined Benefit Plan [Table] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Steam Public Utilities Property Plant And Equipment Steam Public Utilities Property Plant And Equipment Steam Percentage limitation for income available for dividends (not more than) Percentage Limitation For Income Available For Dividends Percentage limitation for income available for dividends Exercise Price Award Exercise Price Long-term Contract for Purchase of Electric Power [Domain] Long-Term Contract for Purchase of Electric Power [Domain] Entity Filer Category Entity Filer Category Debenture 2025A, 5.99%, Due 1955 Debenture 2025A, 5.99 Percent, Due 1955 [Member] Debenture 2025A, 5.99 Percent, Due 2055 Compensation expense to be recognized Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount Benefits paid Defined Benefit Plan, Benefit Obligation, Benefits Paid Reconciliation to rate level Effect of Reconciliation to Rate Level Effect of Reconciliation to Rate Level U.S. Federal Statutory Tax Rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Subsequent Event Type [Axis] Subsequent Event Type [Axis] Equity investments Deferred Tax Assets, Equity Method Investments Real Estate and Other Alternatives Defined Benefit Plan, Real Estate And Other Alternatives [Member] Defined Benefit Plan, Real Estate And Other Alternatives TOTAL PERIODIC BENEFIT CREDIT Periodic Benefit Cost After Amortization Of Regulatory Asset Total Periodic Benefit Cost After Amortization of Regulatory Asset Year 4 Rate Plan for Year 4 [Member] Rate Plan for Year 4 [Member] Deferrals for property taxes limitation from rates (percent) Property Tax Deferrals, Limitation From Rate Property Tax Deferrals, Limitation From Rate Prescription Medications Prescription Medications [Member] Prescription Medications Consideration the project is sold Disposal Group, Including Discontinued Operation, Consideration Debenture Series 2024 D, 5.125% Due 2035 Debenture Series Two Thousand Twenty Four D Five Point One Three Percent Due Two Thousand Thirty Five [Member] Debenture Series Two Thousand Twenty Four D Five Point One Three Percent Due Two Thousand Thirty Five TOTAL LONG-TERM DEBT TOTAL LONG-TERM DEBT Long-Term Debt, Excluding Current Maturities Nonrelated Party Nonrelated Party [Member] Debenture Series 2005A, 5.30% Due 2035 Debenture Series Two Thousand Fivea Five Point Three Zero Percent Due Two Thousand Thirty Five [Member] Debenture Series Two Thousand Five A Five Point Three Zero Percent Due Two Thousand Thirty Five [Member] Cash and temporary cash investments Disposal Group, Including Discontinued Operation, Cash and Cash Equivalents Deferred Project Costs Deferred Project Costs [Member] Energy Efficiency Energy Efficiency [Member] Energy Efficiency [Member] Gross asset Finite-Lived Intangible Assets, Gross Debenture 2021B, 3.17%, Due 2051 Debenture 2021B, 3.170 Percent, Due 2051 [Member] Debenture 2021B, 3.170 Percent, Due 2051 Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Entity Address, Address Line One Entity Address, Address Line One Deferred storm costs Deferred Storm Costs [Member] Deferred Storm Costs [Member] Investments Valued Using NAV Per Share Defined Benefit Plan, Investments Valued Using Net Asset Value [Member] Defined Benefit Plan, Investments Valued Using Net Asset Value [Member] Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Year 5 Rate Plan for Year 5 [Member] Rate Plan for Year 5 [Member] Percent of total customer bill impact per commodity (no more than) Percent Of Total Customer Bill Impact Per Commodity Percent Of Total Customer Bill Impact Per Commodity Accounts receivable – customers, net allowance for uncollectible accounts Accounts Receivable, Allowance for Credit Loss, Current Disposal group, including discontinued operation, operating income (loss) Disposal Group, Including Discontinued Operation, Operating Income (Loss) Regulatory assets, amortization period (in years) Regulatory Asset, Amortization Period Ownership [Axis] Ownership [Axis] Derivative Instruments and Hedging Activities Derivative Instruments and Hedging Activities Disclosure [Text Block] Recognition of prior service credit Recognition of prior service credit Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] Fair Value as of Grant Date Award Grant Date Fair Value Deferred derivative losses, noncurrent, recovery period (in years) Regulatory Assets, Deferred Derivative Losses, Noncurrent, Recovery Period Regulatory Assets, Deferred Derivative Losses, Noncurrent, Recovery Period Debenture Series 2024C, 4.825% Due 2027 Debenture Series Two Thousand Twenty Four C Four Point Two Five Four Percent Due Two Thousand Twenty Seven [Member] Debenture Series Two Thousand Twenty Four C Four Point Two Five Four Percent Due Two Thousand Twenty Seven Property tax reconciliation Property Tax Reconciliation [Member] Regulatory Asset for reconciliation of actual property tax expense to the level allowed in rates. Undistributed earnings, basic Undistributed Earnings, Basic U.S. Equity Defined Benefit Plan, Equity Securities, US [Member] Disposal Group, Held-for-sale, Not Discontinued Operations Disposal Group, Held-for-Sale, Not Discontinued Operations [Member] Debenture 2012A, 4.20%, Due 2042 Debenture 2012A, 4.20 Percent, Due 2042 [Member] Debenture 2012A, 4.20 Percent, Due 2042 [Member] Accrued income taxes Accrued Income Taxes Operating loss carryforwards Operating Loss Carryforwards Changes in unrecognized tax benefits Effective Income Tax Rate Reconciliation, Tax Contingency, Amount Fair Value, Inputs, Level 1 and 2 Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] Schedule of Long-Term Debt Maturities Schedule of Long-Term Debt Instruments [Table Text Block] Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period TOTAL SHAREHOLDERS' EQUITY BEFORE ACCUMULATED OTHER COMPREHENSIVE INCOME TOTAL SHAREHOLDER'S EQUITY BEFORE ACCUMULATED OTHER COMPREHENSIVE INCOME Common Stock Equity Before Accumulated Comprehensive Income Loss Common stock equity before accumulated comprehensive income loss. Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Related Party Transaction [Line Items] Related Party Transaction [Line Items] Electric base rate percentage Electric Base Rate Percentage Electric Base Rate Percentage Current Derivative Financial Instruments Current Liabilities [Member] Derivative Financial Instruments Current Liabilities [Member] Electric Distribution Electric Distribution [Member] Schedule of Commodity Derivatives Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] LONG-TERM DEBT Long-term debt, fair value Long-Term Debt, Fair Value Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Counterparty Name [Domain] Counterparty Name [Domain] Post-65 Medical Post-65 Medical [Member] Post-65 Medical Electric Electric Transmission Electric Transmission [Member] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Tax-Exempt Debt Tax Exempt Debt [Member] Tax Exempt Debt [Member] Condensed Financial Information Disclosure [Abstract] Condensed Financial Information Disclosure [Abstract] Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Remediation cost estimate Site Contingency, Loss Exposure Not Accrued, Best Estimate Public utilities, requested return on equity, percentage Public Utilities, Requested Return on Equity, Percentage Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount 2028 Defined Benefit Plan, Expected Future Benefit Payment, Year Three Other current liabilities Disposal Group, Including Discontinued Operation, Other Liabilities, Current Interest Expense Interest and Debt Expense Shares purchased on the open market (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Purchased for Award Non-PEO NEO Non-PEO NEO [Member] Capital Stock Expense Capital Stock Expense Other Changes Stockholders Equity [Member] Other Changes Stockholders Equity Ending Balance 2029 Lessee, Operating Lease, Liability, to be Paid, Rolling Year Four Lease not yet commenced, term (in years) Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract Schedule of Offsetting of Assets Offsetting Assets [Table Text Block] Schedule of Regulatory Liabilities Schedule of Regulatory Liabilities [Table Text Block] Award Type [Domain] Award Type [Domain] OTHER NONCURRENT ASSETS Disposal Group, Including Discontinued Operation, Assets, Noncurrent [Abstract] Equity Awards Adjustments Equity Awards Adjustments [Member] Other non-cash items, net Other Noncash Income (Expense) Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Other income Other Income Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Compensation Amount Outstanding Recovery Compensation Amount Contract term (years) Term Of Contract Term Of Contract Total fair value of derivative liabilities Derivative Financial Instruments, Liabilities [Member] Subsegments [Domain] Subsegments [Domain] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Fair Value Estimate of Fair Value Measurement [Member] Retirement Plan Type [Domain] Retirement Plan Type [Domain] Reporting Unit [Domain] Reporting Unit [Domain] Schedule of Roll forward of Allowance for Credit Losses Accounts Receivable, Allowance for Credit Loss [Table Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Investment gains or losses is recognized in expense period Investment Gains or Losses Is Recognized In Expense Period Investment Gains or Losses Is Recognized In Expense Period Arrears Relief Program Deferral Arrears Relief Program Deferral [Member] Arrears Relief Program Deferral Stock purchase plan Employee Stock [Member] System peak reduction and energy efficiency programs System Peak Reduction And Energy Efficiency Programs [Member] System Peak Reduction And Energy Efficiency Programs [Member] OPERATING REVENUES OPERATING REVENUES Revenues [Abstract] Depreciation expense, other deferred charges and noncurrent assets and prepayments Depreciation Expense, Other Deferred Charges And Noncurrent Assets And Prepayments Depreciation Expense, Other Deferred Charges And Noncurrent Assets And Prepayments Documents Incorporated by Reference Documents Incorporated by Reference [Text Block] BALANCE AT END OF PERIOD EXCLUDING HELD FOR SALE Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Excluding Cash Held For Sale Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Excluding Cash Held For Sale Cash Value of Life Insurance Policies Fair Value Other [Member] Fair Value Other [Member] Maximum deferral (percent) Public Utilities, Maximum Deferral Percentage Public Utilities, Maximum Deferral Percentage O&R O&R Orange And Rockland Utilities Inc [Member] Orange And Rockland Utilities Inc. [Member] Accumulated other comprehensive income TOTAL ACCUMULATED OTHER COMPREHENSIVE INCOME, NET OF TAXES TOTAL ACCUMULATED OTHER COMPREHENSIVE INCOME, NET OF TAXES Accumulated Other Comprehensive Income (Loss), Net of Tax Fuel oil, gas in storage, materials and supplies, at average cost Fuel oil, gas in storage, materials and supplies, at average cost Energy Related Inventory Fuel Oil Gas And Materials And Supplies Cost Energy related inventory, fuel oil, gas and materials and supplies, cost Weighted average interest rate (percent) Weighted Average Interest Rate Of Commercial Paper Weighted Average Interest Rate Of Commercial Paper Uncollecetible expenses, threshold amount Public Utilities, Uncollecetible Expenses, Threshold Amount Public Utilities, Uncollecetible Expenses, Threshold Amount 2026 Long-Term Debt, Maturity, Year One Debenture 2021A, 2.31%, Due 2031 Debenture 2021A, 2.31 Percent, Due 2031 [Member] Debenture 2021A, 2.31 Percent, Due 2031 Total deferred tax liabilities Deferred Tax Liabilities, Gross 2030 Long-Term Debt, Maturity, Year Five Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Carrying value of tax equity interest Carrying Value Of Tax Equity Interest Carrying Value Of Tax Equity Interest Environmental Remediation Site [Axis] Environmental Remediation Site [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Minimum Minimum [Member] Income Tax Authority, Name [Domain] Income Tax Authority, Name [Domain] Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Company Selected Measure Name Company Selected Measure Name Accrued liability Accrual for Environmental Loss Contingencies Fair Value Measurement [Domain] Fair Value Measurement [Domain] Change In Contract With Customer [Roll Forward] Change In Contract With Customer [Roll Forward] Change In Contract With Customer Asset Retirement Obligations Asset Retirement Obligation Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Accounts payable Accounts payable Accounts payable to affiliated companies Accounts Payable, Current Operating lease cash flows Operating Lease, Payments Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Issuance of common shares for dividend reinvestment Dividends Payable Generation Public Utilities, Property, Plant and Equipment, Generation or Processing Trend Rates [Axis] Trend Rates [Axis] Trend Rates Cost of long-term debt (percent) Percentage Of Debt Securities Amortized Cost Based Percentage Of Debt Securities Amortized Cost Based Debenture Series 2016C, 4.30% Due 2056 Debenture Series 2016C, 4.30% Due 2056 [Member] Debenture Series 2016C, 4.30% Due 2056 [Member] Impairment charges Impairment of Intangible Assets (Excluding Goodwill) Expected share price volatility, minimum (percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum Material Contingencies Commitments and Contingencies Disclosure [Text Block] Regulated Operation, Regulatory Asset [Table] Regulated Operation, Regulatory Asset [Table] OTHER NONCURRENT ASSETS OTHER NONCURRENT ASSETS Other Assets, Noncurrent [Abstract] Superfund and other environmental costs Deferred Tax Liabilities, Superfund And Other Environmental Costs Deferred tax assets superfund and environmental costs. Distribution Public Utilities, Property, Plant and Equipment, Distribution AVERAGE NUMBER OF SHARES OUTSTANDING — DILUTED (in shares) Adjusted weighted average common shares outstanding – diluted (in shares) Average Number Of Shares Outstanding—Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Agreement [Domain] Agreement [Domain] Agreement [Domain] Entity Small Business Entity Small Business Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Interest expense and no penalties Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Other operating and maintenance expenses Other Cost and Expense, Operating Non-utility capital expenditures Payments Non Utility Construction Expenditures Payments Non Utility Construction Expenditures Tax expense due to affiliates Related Party Tax Expense, Due to Affiliates, Current Amount of costs that will not recover from customers Loss Contingency, Loss in Period Current Current State and Local Tax Expense (Benefit) Deferral of net increase (decrease) to regulatory assets Deferred Expense Recognized Deferred Expense Recognized Document Transition Report Document Transition Report Steam Steam Steam Plant [Member] Deferred derivative gains Deferred Derivative Gains Current [Member] Regulatory Liability for reserve of change in fair value of derivative instrument. Schedule of Reconciliation of Beginning and Ending Net Balances for Assets and Liabilities Measured at Level 3 Fair Value Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block] Total future minimum lease payments Finance Lease, Liability, to be Paid Underlying Securities Award Underlying Securities Amount Debenture 2010B, 5.50%, Due 2040 Debenture 2010B, 5.50 Percent, Due 2040 [Member] Debenture 2010B, 5.50 Percent, Due 2040 [Member] Schedule of Employer Contribution to Defined Savings Plan Defined Contribution Plan Disclosures [Table Text Block] Equity Component [Domain] Equity Component [Domain] 2027 Finance Lease, Liability, to be Paid, Rolling Year Two Borrowing under term loan Borrowing under term loan Proceeds From Borrowing Under Term Loan Proceeds From Borrowing Under Term Loan Document Period End Date Document Period End Date Derivatives in net asset position additional cash collateral Additional Collateral For Derivative Net Assets The additional collateral that would be required for derivative instruments that are net assets. Late payment charges and fees Revenue From Contracts With Customer, Late Payment Charges And Fees Revenue From Contracts With Customer, Late Payment Charges And Fees Deferral, annual maximum (not more than) (percent) Property Tax Deferrals Limitation From Rate, Annual Maximum Property Tax Deferrals Limitation From Rate, Annual Maximum Income Tax Income Tax Disclosure [Text Block] Beginning Balance Ending Balance Accounts Receivable, Allowance for Credit Loss Actual return on common equity, percent Public Utilities, Return on Equity, Percentage Public Utilities, Return on Equity, Percentage Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Gain (loss) on disposition of stock in subsidiary, after tax Gain (Loss) On Disposition Of Stock In Subsidiary, After Tax Gain (Loss) On Disposition Of Stock In Subsidiary, After Tax Remediation costs incurred Environmental Remediation Expense, before Recovery Debt Securities Debt Securities Defined Benefit Plan, Debt Security [Member] Electric Electric Generation Electricity Generation Plant, Non-Nuclear [Member] BALANCE AS OF BEGINNING OF PERIOD BALANCE AS OF END OF PERIOD Total Shareholders' Equity (See Consolidated Statement of Shareholders' Equity) Equity, Including Portion Attributable to Noncontrolling Interest Amount of cost recovery Public Utilities, Property, Plant And Equipment, Base Rate, Amount Of Cost Recovery Public Utilities, Property, Plant And Equipment, Base Rate, Amount Of Cost Recovery Debenture 2021C, 3.20 Percent, Due 2051 Debenture 2021C, 3.200 Percent, Due 2051 [Member] Debenture 2021C, 3.200 Percent, Due 2051 Document Type Document Type Level 3 Level 3 Fair Value, Inputs, Level 3 [Member] Name Outstanding Recovery, Individual Name Loss Contingencies [Table] Loss Contingencies [Table] Additional paid-in-capital Additional Paid in Capital Product and Service [Axis] Product and Service [Axis] LESS: CASH AND RESTRICTED CASH BALANCES HELD FOR SALE Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Held For Sale, Period Increase (Decrease), Including Exchange Rate Effect Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Held For Sale, Period Increase (Decrease), Including Exchange Rate Effect Shortfall in revenue Public Utilities, Shortfalls In Revenue Public Utilities, Shortfalls In Revenue Revenues from contracts with customers Revenue from Contract with Customer, Excluding Assessed Tax Less: Accumulated depreciation Less: Accumulated depreciation Public Utilities, Property, Plant and Equipment, Accumulated Depreciation TOTAL CURRENT ASSETS Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Debenture 2020C, 3.00%, Due 2060 Debenture 2020C, 3.00 Percent, Due 2060 [Member] Debenture 2020C, 3.00 Percent, Due 2060 Tax cuts and jobs act of 2017, change in tax rate, regulatory asset, income tax benefit Tax Cuts And Jobs Act Of 2017, Change In Tax Rate, Regulatory Asset, Income Tax Benefit Tax Cuts And Jobs Act Of 2017, Change In Tax Rate, Regulatory Asset, Income Tax Benefit Debenture 2008B, 6.75%, Due 2038 Debenture 2008B, 6.75 Percent, Due 2038 [Member] Debenture 2008B, 6.75 Percent, Due 2038 [Member] Loss contingency accrual Loss Contingency Accrual Other receivables, net allowance for uncollectible accounts Other Receivables, Net, Current Regulatory Asset [Domain] Regulatory Asset [Domain] Depreciation and amortization, before tax Disposal Group, Including Discontinued Operation, Depreciation and Amortization Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Disposal Group Name [Axis] Disposal Group Name [Axis] Debenture 2020A, 3.35%, Due 2030 Debenture 2020A, 3.35 Percent, Due 2030 [Member] Debenture 2020A, 3.35 Percent, Due 2030 Other Nonqualified Supplemental Defined Benefit Pension Other Pension, Postretirement and Supplemental Plans [Member] Pension and Retiree Benefits – Asset Deferred Tax Liabilities, Pensions And Retiree Benefits Deferred Tax Liabilities, Pensions And Retiree Benefits Legacy Meters Deferred Tax Liabilities Legacy Meters Deferred Tax Liabilities Legacy Meters Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Net deferred or recognized gains (losses) Net Deferred Gain Loss Net deferred gain/(loss) Regulatory assets Regulatory assets Regulatory assets – current Regulatory Asset, Current Insurance receivable Insurance Settlements Receivable Assets under finance leases Direct Financing Lease, Residual Value of Leased Asset CURRENT LIABILITIES CURRENT LIABILITIES Current Liabilities Liabilities, Current [Abstract] TOTAL OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAXES Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Debenture Series 2003A, 5.875% Due 2033 Debenture Series Two Thousand Threea Five Point Eight Seven Five Percent Due Two Thousand Thirty Three [Member] Debenture Series Two Thousand Three A Five Point Eight Seven Five Percent Due Two Thousand Thirty Three [Member] Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Schedule of Realized and Unrealized Gains or Losses on Commodity Derivatives Derivative Instruments, Gain (Loss) [Table Text Block] TOTAL OPERATING EXPENSES Cost of services received Operating Expenses Debenture 2014A, 4.45%, Due 2044 Debenture 2014A, 4.45 Percent, Due 2044 [Member] Debenture 2014A, 4.45 Percent, Due 2044 [Member] Transferred (in shares) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Transferred In Period Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Transferred In Period Risk-free interest rate, minimum (percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum Level 1 Fair Value, Inputs, Level 1 [Member] Total cash, temporary cash investments and restricted cash Cash, Cash Equivalents, Restricted Cash, Excluding Held-For-Sale Cash, Cash Equivalents, Restricted Cash, Excluding Held-For-Sale Income (loss) from equity method Investments, after tax OCI, Equity Method Investment, after Tax Related Party Transaction [Table] Related Party Transaction [Table] Net income per common share — diluted (in dollars per share) Net income per common share — diluted (in dollars per share) Net Income Per Share – Diluted (in dollars per share) Earnings Per Share, Diluted Accounts receivable – customers, net allowance for uncollectible accounts of $507 and $620 in 2025 and 2024, respectively Accounts receivable Accounts receivable from affiliated companies Accounts Receivable, after Allowance for Credit Loss, Current Schedule of Assumptions Schedule of Actuarial Assumptions Defined Benefit Plan, Assumptions [Table Text Block] Additions Unbilled Contracts Receivable, Revenue Recognized Unbilled Contracts Receivable, Revenue Recognized Treasury shares (in shares) BALANCE AS OF BEGINNING OF PERIOD (in treasury shares) BALANCE AS OF END OF PERIOD (in treasury shares) Treasury Stock, Common, Shares State Income Tax Paid, State and Local, after Refund Received Consolidation Items [Domain] Consolidation Items [Domain] General Business Description and Basis of Presentation [Text Block] Margin deposit liability Margin Deposit Liability Margin Deposit Liability Auditor Location Auditor Location Electric Energy Electric Energy Derivative [Member] Electric Energy Derivative [Member] Prepayments Increase (Decrease) in Prepaid Expense Debenture Series 2018E, 4.65% Due 2048 Debenture Series 2018E, 4.650% Due 2048 [Member] Debenture Series 2018E, 4.650% Due 2048 [Member] Included in regulatory assets and liabilities Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Regulatory Assets and Liabilities Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Regulatory Assets and Liabilities Prepayments Prepaid Expense Year 10 Rate Plan For Year 10 [Member] Rate Plan For Year 10 Superfund Sites Superfund Sites [Member] Superfund Sites [Member] Condensed Balance Sheet Statement [Table] Condensed Balance Sheet Statement [Table] Public Utilities General Disclosures [Table] Public Utilities General Disclosures [Table] Net actuarial loss (gain) Net actuarial (gain)/loss Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss) Domestic Tax Jurisdiction [Member] Domestic Tax Jurisdiction [Member] Participant contributions Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant Plan amendments Defined Benefit Plan, Benefit Obligation, Increase (Decrease) for Plan Amendment Regulatory Liability [Domain] Regulatory Liability [Domain] Included in earnings Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings Less: imputed interest Lessee, Operating Lease, Liability, Undiscounted Excess Amount Schedule of Aggregate Fair Value of Companies' Derivative Instruments with Credit-Risk-Related Contingent Features Disclosure of Credit Derivatives [Table Text Block] Intangible assets, less accumulated amortization Disposal Group, Including Discontinued Operation, Intangible Assets Cash and Cash Equivalents [Line Items] Cash and Cash Equivalents [Line Items] Deferred credits, noncurrent liabilities and other regulatory liabilities Deferred credits, noncurrent liabilities and other regulatory liabilities Increase (Decrease) in Deferred Liabilities Tax Credit Carryforward [Axis] Tax Credit Carryforward [Axis] Total cash paid for income taxes (net of refunds) Income Taxes Paid, Net Environmental Matters Environmental Loss Contingency Disclosure [Text Block] Other Other Regulatory Liabilities [Member] Other regulatory liabilities. Assets held for sale TOTAL CURRENT ASSETS Disposal Group, Including Discontinued Operation, Assets, Current TOTAL PROJECT DEBT Long-Term Debt, Gross Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Base rate changes Base Rate Increase Decrease Base rate increase decrease. Accrued wages Accrued wages Employee-related Liabilities, Current Total future minimum lease payments Lessee, Operating Lease, Liability, to be Paid Subsidiaries Subsidiaries [Member] Unobservable Inputs Range (dollar per unit) Derivative Asset, Measurement Input Over Two Years Over Two Years [Member] Over Two Years Unrecognized pension and other postretirement costs period Unrecognized Pension And Other Postretirement Costs Period Unrecognized Pension And Other Postretirement Costs Period Distributions to noncontrolling interests Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Inter- segment revenues Intersegment Eliminations [Member] Expiration Date Trading Arrangement Expiration Date Other current liabilities Other current liabilities Increase (Decrease) in Other Operating Liabilities Debenture 2023C, 5.90%, Due 2053 Debenture 2023C, 5.90 Percent, Due 2053 [Member] Debenture 2023C, 5.90 Percent, Due 2053 Schedule of Investment Assets Equity Method Investments [Table Text Block] NET PLANT Property, Plant and Equipment, Net Debenture 2019C, 3.46%, Due 2039 Debenture 2019C, 3.46 Percent, Due 2039 [Member] Debenture 2019C, 3.46 Percent, Due 2039 [Member] Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Accounts receivable – customers, net Increase (Decrease) in Accounts Receivable Entity Current Reporting Status Entity Current Reporting Status Settlement of gas proceedings Settlement of Gas Proceedings [Member] Settlement of Gas Proceedings [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Revenue from External Customers [Table] Segment Reporting, Revenue from External Customer, Product and Service [Table] Consolidated Entities [Domain] Consolidated Entities [Domain] Downgrade to Below Investment Grade from Current Ratings Additional Collateral Aggregate Fair Value Down Below Investment Grade [Member] Additional Collateral Aggregate Fair Value Down Below Investment Grade [Member] Total Funds For Retiree Health Benefits Total Funds For Retiree Health Benefits [Member] Total Funds For Retiree Health Benefits Con Edison Transmission Con Edison Transmission [Member] Con Edison Transmission [Member] U.S. Federal Statutory Tax Rate Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Deferred tax assets: Deferred Tax Assets, Gross [Abstract] Non-NY State Income taxes related to the Clean Energy Businesses, net of federal income taxes Effective Income Tax Rate Reconciliation, Non NY State Taxes Related To The Clean Energy Businesses, Net Of Federal Income Taxes, Amount Effective Income Tax Rate Reconciliation, Non NY State Taxes Related To The Clean Energy Businesses, Net Of Federal Income Taxes, Amount Debentures Debentures [Member] Debentures [Member] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Executive Category: Executive Category [Axis] Over Fifteen Years Over Fifteen Years [Member] Over Fifteen Years Number of people injured in explosion and fire incident (more than) Number of People Injured in Explosion and Fire Incident Number of people injured in explosion and fire incident. Hedge Funds Hedge Funds [Member] Asset retirement obligations Asset retirement obligations Asset Retirement Obligations, Noncurrent TOTAL SHAREHOLDERS' EQUITY BEFORE ACCUMULATED OTHER COMPREHENSIVE INCOME (in shares) TOTAL EQUITY BEFORE ACCUMULATED OTHER COMPREHENSIVE LOSS (in shares) Common Stock Equity Shares Common Stock Equity Shares Repayment of term loan Repayment of term loan Repayments of debt Repayments of Debt State income taxes, net of federal income taxes Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent Cost of removal Effective Income Tax Rate Reconciliation Cost Of Removal, Percent Effective Income Tax Rate Reconciliation, cost of removal Production Tax Credit   Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Amount Other current liabilities Finance Lease, Liability, Current Accumulated benefit obligation Defined Benefit Plan, Accumulated Benefit Obligation Issuance of long-term debt Issuance of long-term debt Proceeds from Issuance of Long-Term Debt NET INTEREST EXPENSE Interest expense Interest Expense, Operating and Nonoperating Current Fiscal Year End Date Current Fiscal Year End Date Initial Cost Trend Rate Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year Difference between fair value and expected market related value of plan assets (percent) Difference Between Fair Value And Expected Market Related Value Of Plan Assets Difference between fair value and expected market related value of plan assets Percentage of revenue reserve Percentage of Revenue Reserve Percentage of Revenue Reserve Expected term (years) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Rockland Electric Company (RECO) Rockland Electric Company (RECO) [Member] Rockland Electric Company (RECO) Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Workers' Compensation Workers' Compensation Insurance [Member] Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Schedule of Total Guarantees Schedule of Guarantor Obligations [Table Text Block] Net Amounts of Assets/ (Liabilities) Derivative liabilities Derivative Liability Legacy Meters Legacy Meters [Member] Legacy Meters Maximum percentage allowed to invest (not more than) (in percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Maximum Employee Subscription Rate Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] 2030 Finance Lease, Liability, to be Paid, Rolling Year Five Depreciation and amortization, after tax Disposal Group, Including Discontinued Operation, Depreciation And Amortization, After Tax Disposal Group, Including Discontinued Operation, Depreciation And Amortization, After Tax Unrecognized pension and other postretirement costs Unrecognized Pension And Other Postretirement Costs [Member] Regulatory Asset for difference between Liability to Fair Value of Plan Assets and Projected Benefit Obligation. Provision for injuries and damages Provision for injuries and damages Provision For Injuries And Damages Provision for injuries and damages. Distributions from equity investments Proceeds from Equity Method Investment, Distribution Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block] Condensed Balance Sheet Statements, Captions [Line Items] Condensed Balance Sheet Statements, Captions [Line Items] Unrecognized tax benefits Balance at beginning of period Balance at end of period Unrecognized Tax Benefits Recovery of energy efficiency and savings program costs Public Utilities, Energy and Efficiency Savings Program, Recovery Costs Public Utilities, Energy and Efficiency Savings Program, Recovery Costs Site Contingency [Line Items] Site Contingency [Line Items] Unrecorded unconditional purchase obligation Unrecorded Unconditional Purchase Obligation Period 1 Period 1 [Member] Period 1 Number of deferred projects Number Of Deferred Projects Number Of Deferred Projects 2027 Long-Term Debt, Maturity, Year Two Supplemental retirement income plan assets Supplemental Retirement Income Plan Assets Supplemental Retirement Income Plan Assets Inter-Zonal Forward Price Curves Measurement Input, Commodity Inter-Zonal Forward Price Curve [Member] Measurement Input, Commodity Inter-Zonal Forward Price Curve [Member] O&R Merger O R Merger [Member] O&R Merger [Member] Leases Lessee, Operating Leases [Text Block] NET CASH FLOWS FROM (USED IN) FINANCING ACTIVITIES Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Measure: Measure [Axis] Non-employee director deferred stock compensation Non Employee Director Stock Compensation [Member] Non Employee Director Deferred Stock Compensation [Member] Subsegments Consolidation Items [Axis] Subsegments Consolidation Items [Axis] Valuation Approach and Technique [Axis] Valuation Approach and Technique [Axis] Dividends received Proceeds from Dividends Received Net Amounts of Assets/ (Liabilities) Derivative, Fair Value, Net Guarantor Obligations, Term [Domain] Guarantor Obligations, Term [Domain] [Domain] for Guarantor Obligations, Term [Axis] Investment gains and losses recognized, time period (years) Pension Investment Gains And Losses Recognized Time Period Pension investment gains and losses recognized time period. Stock Awards Stock awards Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Other Other Services [Member] Other Services [Member] Operating costs Operating costs Cost of Product and Service Sold TSR Portion Tsr Portion [Member] TSR Portion [Member] Customer Account Deferrals Deferred Tax Liabilities, Customer Account Deferrals Deferred Tax Liabilities, Customer Account Deferrals Disposal Group Classification [Domain] Disposal Group Classification [Domain] Downgrade One Level from Current Ratings Additional Collateral Aggregate Fair Value Down One Level [Member] Additional Collateral Aggregate Fair Value Down One Level [Member] Statement of Financial Position Location, Activity, Accrual [Domain] Statement of Financial Position Location, Activity, Accrual [Domain] CET Gas Con Edison Gas Pipeline and Storage, LLC [Member] Con Edison Gas Pipeline and Storage, LLC [Member] Notional amount Derivative, Nonmonetary Notional Amount Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Common stock received upon vesting (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Shares Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Shares Public Utilities, General Disclosures [Line Items] Public Utilities, General Disclosures [Line Items] Entity Tax Identification Number Entity Tax Identification Number Discounted Cash Flow Valuation Technique, Discounted Cash Flow [Member] Weighted average share price per share, on shares purchased on open market (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Per Share Weighted Average Price of Shares Purchased Decrease in allowance for uncollectible accounts Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease) Tax Credits Effective Income Tax Rate Reconciliation, Tax Credit, Percent 2028 Contractual Obligation, to be Paid, Year Three Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] Fair Value, Concentration of Risk, Financial Statement Captions [Line Items] Credit Availability Through March 2028 Credit Availability Through March 2028 [Member] Credit Availability Through December 2022 [Member] Tax-Exempt Debt Series 2005A, 3.40% Due 2039 Tax Exempt Debt Series 2005A Due 2039 [Member] Tax Exempt Debt Series 2005A Due 2039 [Member] Debenture 2009C, 5.50%, Due 2039 Debenture 2009C, 5.50 Percent, Due 2039 [Member] Debenture 2009C, 5.50 Percent, Due 2039 [Member] Debenture 2019B, 2.94%, Due 2029 Debenture 2019B, 2.94 Percent, Due 2029 [Member] Debenture 2019B, 2.94 Percent, Due 2029 [Member] Common Stock, Shares, Issued Common Stock, Shares, Issued TOTAL NONCURRENT LIABILITIES Liabilities, Other than Long-Term Debt, Noncurrent Asbestos Suits Asbestos Suits [Member] Asbestos Suits [Member] Derivative asset, statement of financial position [Extensible Enumeration] Derivative Asset, Statement of Financial Position [Extensible Enumeration] Weighted Average Remaining Lease Term, Operating leases (in years) Operating Lease, Weighted Average Remaining Lease Term 2029 Long-Term Debt, Maturity, Year Four Total Regulatory Liabilities Regulatory liabilities Regulatory Liability Goodwill Goodwill and Intangible Assets Disclosure [Text Block] Other earnings incentives Other Incentive Revenue Other Incentive Revenue Regulatory Liabilities Non Current Regulatory Liabilities Non Current [Member] Deferred Derivative Gains Non Current [Member] Entity Public Float Entity Public Float Trading Arrangement: Trading Arrangement [Axis] Restricted cash Disposal Group, Including Discontinued Operation, Restricted Cash, Current Disposal Group, Including Discontinued Operation, Restricted Cash, Current Reduction in income taxes payable Increase (Decrease) in Income Taxes Payable Fair value of derivative assets Fair value of derivative assets Derivative Asset, Current Total Shareholder Return Amount Total Shareholder Return Amount Clean Energy Businesses Clean Energy Businesses [Member] Clean Energy Businesses [Member] Gain (loss) on Level 3 energy derivative assets and liabilities Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings Loss Contingencies [Line Items] Loss Contingencies [Line Items] Period 2 Period 2 [Member] Period 2 Other Segment Reporting, Reconciling Item, Corporate Nonsegment [Member] Security Exchange Name Security Exchange Name Defined Benefit Plan, Plan Assets, Fair Value by Hierarchy and NAV [Extensible List] Defined Benefit Plan, Plan Assets, Fair Value by Hierarchy and NAV [Extensible Enumeration] Income tax paid, foreign, after refund received Income Tax Paid, Foreign, after Refund Received Debenture Series 2005B, 5.25% Due 2035 Debenture Series Two Thousand Five B Five Point Two Five Percent Due Two Thousand Thirty Five [Member] Debenture Series Two Thousand Five B Five Point Two Five Percent Due Two Thousand Thirty Five [Member] Superfund and other environmental costs, net Superfund and other environmental costs, net Other Increase (Decrease) in Environmental Liabilities Defined Contribution Savings Plan Other Pension Plan [Member] 2027 Contractual Obligation, to be Paid, Year Two Noncurrent liabilities Liabilities, Noncurrent General Plant General General Utility [Member] General Utility Nontaxable or Nondeductible items Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount Non-TSR Portion Non Tsr Portion [Member] Non tsr portion. Equipment acquired but unpaid as of end of period Capital Expenditures Incurred but Not yet Paid Maximum borrowing capacity Line of Credit Facility, Maximum Borrowing Capacity Defined Benefit Plan, Plan Assets, Category [Domain] Defined Benefit Plan, Plan Assets, Category [Domain] Issuance of common shares - public offering Proceeds from Issuance Initial Public Offering Prepayments Prepayments Prepaid Expense, Current OPERATING EXPENSES OPERATING EXPENSES Operating Expenses [Abstract] Other current liabilities Other current liabilities Other Liabilities, Current Participant contributions Defined Benefit Plan, Plan Assets, Contributions by Plan Participant Asset Class [Domain] Asset Class [Domain] Service cost – excluding administrative expenses Defined Benefit Plan Service Cost Excluding Administrative Expenses Defined Benefit Plan Service Cost Excluding Administrative Expenses Discount rate, net periodic benefit cost (percent) Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Adjustment percentage used for Performance awards Share Based Compensation Arrangement Percentage of RSU Share Based Compensation Arrangement Percentage of RSU Pensions and retiree benefits Pensions and retiree benefits Liability, Defined Benefit Plan, Noncurrent Statement [Line Items] Statement [Line Items] Operating lease liabilities Disposal Group, Including Discontinued Operation, Operating Lease Liabilities, Current Disposal Group, Including Discontinued Operation, Operating Lease Liabilities, Current Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and temporary cash investments Cash and temporary cash investments Cash and Cash Equivalent Estimated project cost (in percent) Percentage Of Estimated Costs On Projects Percentage of estimated costs on projects. Risk-free interest rate, maximum (percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum Increase to net deferred income tax liabilities Increase (Decrease) in Deferred Income Taxes Common Stock Common Stock Common Stock [Member] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Deferred derivative losses - long term Derivative Losses Long Term [Member] Regulatory Asset for deferral of change in fair value of derivative instrument. Sale of natural gas Sales Of Natural Gas Propane Ngls And Condensate And Affiliates Sales Of Natural Gas Propane Ngls And Condensate And Affiliates Finance Leases Finance Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Regulatory assets not earning return Regulatory Assets Not Earning Return Regulatory Assets Not Earning Return NET CHANGE FOR THE PERIOD Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation November 2025 Credit Agreement Variable Rate 364 Day Revolving Credit Agreement November 2025 Credit Agreement Variable Rate 364 Day Revolving Credit Agreement [Member] November 2025 Credit Agreement Variable Rate 364 Day Revolving Credit Agreement Repurchased Con Edison Stock Repurchased Con Edison Stock [Member] Repurchased Con Edison Stock Notes payable Notes payable Notes Payable, Current Guarantor Obligations [Line Items] Guarantor Obligations [Line Items] Summary of Significant Accounting Policies and Other Matters Significant Accounting Policies [Text Block] MTA Surcredit amortization, net of federal income taxes Effective Income Tax Rate Reconciliation, Nondeductible Expense, MTA Surcredit Amortization Of Excess Deferred Federal Income Taxes, Percent Effective Income Tax Rate Reconciliation, Nondeductible Expense, MTA Surcredit Amortization Of Excess Deferred Federal Income Taxes, Percent Benefits paid and administrative expenses, net of subsidies Defined Benefit Plan Benefits Paid And Administrative Expenses Defined Benefit Plan, benefits paid and administrative expenses Other operations and maintenance Other operations and maintenance Oil and Gas, Operation and Maintenance [Member] Statistical Measurement [Domain] Statistical Measurement [Domain] Unrecognized pension and other postretirement costs Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Postretirement Benefits Other comprehensive (income) loss, prior service cost Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Reclassification Adjustment from AOCI, after Tax Other operations and maintenance Other Operations and Maintenance Other Operations and Maintenance Average rate base Regulatory Matters Average Base Rate Regulatory Matters Average Base Rate NET PLANT Disposal Group, Including Discontinued Operation, Property, Plant and Equipment Related Party Transaction [Axis] Related Party Transaction [Axis] Pending Activities Pending Activities [Member] Pending Activities Asset Class [Axis] Asset Class [Axis] Maximum employer contribution match (up to) Share Based Compensation Arrangement By Share Based Payment Award Maximum Employer Contribution Share-based Compensation Arrangement by Share-based Payment Award, Maximum employer contribution Valuation Approach and Technique [Domain] Valuation Approach and Technique [Domain] Long-Lived and Intangible Assets and Assets Held for Sale Impairment or Disposal of Long-Lived Assets, Policy [Policy Text Block] Income (loss) from equity method investments Income (Loss) from Equity Method Investments Leases [Abstract] Leases [Abstract] Additions based on tax positions of prior years Unrecognized Tax Benefits, Increase Resulting from Prior Period Tax Positions Notes Notes Payable to Banks [Member] Beginning balance Ending balance Unbilled contracts receivable Unbilled Contracts Receivable Schedule of Capitalization, Long-term Debt [Line Items] Schedule of Capitalization, Long-Term Debt [Line Items] Aggregate project cost Aggregate Project Cost Aggregate Project Cost Accounts payable Accounts payable Increase (Decrease) in Accounts Payable Schedule of Disposal Groups, Including Discontinued Operations Disposal Groups, Including Discontinued Operations [Table Text Block] Downward price adjustment, after tax Disposition Of Stock In Subsidiary, Downward Price Adjustment, After Tax Disposition Of Stock In Subsidiary, Downward Price Adjustment, After Tax Payment for settlement of vested units Payment For Settlement Of Vested Units Payment For Settlement Of Vested Units Operating lease right-of-use asset Disposal Group, Including Discontinued Operation, Operating Lease Right-Of-Use Asset Disposal Group, Including Discontinued Operation, Operating Lease Right-Of-Use Asset Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Net income per common share — basic (in dollars per share) Net income per common share — basic (in dollars per share) Net Income Per Share – Basic (in dollars per share) Earnings Per Share, Basic Disposal group, including discontinued operation, asset retirement obligations Asset retirement obligations Disposal Group, Including Discontinued Operation, Asset Retirement Obligations Disposal Group, Including Discontinued Operation, Asset Retirement Obligations Schedule of Health Care Cost Trend Rates Schedule of Health Care Cost Trend Rates [Table Text Block] Less: Held for sale project debt, net Long-Term Debt, Held For Sale Long-Term Debt, Held For Sale Liabilities settled Asset Retirement Obligation, Liabilities Settled Actual net expenses amount Actual Net Expenses Amount Actual Net Expenses Amount Additional collateral Additional Collateral, Aggregate Fair Value Potential offsetting credit adjustments Potential Offsetting Credit Adjustments Potential Offsetting Credit Adjustments Changes in unrecognized tax benefits Effective Income Tax Rate Reconciliation, Tax Contingency, Percent Discount rate, benefit obligations (percent) Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Investment plan, term (in years) Public Utilities, Infrastructure Investment Plan, Period Public Utilities, Infrastructure Investment Plan, Period Other comprehensive income (loss) Other comprehensive income (loss) Other Comprehensive Income (Loss), Net of Tax Schedule of Financial Data for Business Segments Schedule of Segment Reporting Information, by Segment [Table Text Block] Disposal of noncontrolling interest Gain (Loss) on Disposition of Stock in Subsidiary Long-term Contract for Purchase of Electric Power [Axis] Long-Term Contract for Purchase of Electric Power [Axis] Measurement Input Type [Domain] Measurement Input Type [Domain] Changes in estimated cash flows Asset Retirement Obligation, Revision of Estimate Gain on the sale of an interest in a solar electric production project Gain (Loss) on Sale of Project Commodity Fair Value Commodity [Member] Fair Value Commodity [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Number of buildings destroyed by fire Number of Buildings Destroyed by Fire Number of Buildings Destroyed by Fire Earnings sharing, threshold limit Revenue Sharing Threshold Limit Revenue Sharing Threshold Limit Fuel Fuel Fuel [Member] Accounts and Financing Receivables [Table] Accounts and Financing Receivables [Table] NY Transco NY Transco [Member] NY Transco [Member] Payments to acquire equity method investments Payments to Acquire Equity Method Investments Issuance of common shares for stock plans Shares Issued, Value, Share-Based Payment Arrangement, before Forfeiture Stock-based compensation expense Share-Based Payment Arrangement, Expense Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Finance Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Increase in regulatory liability resulting from TCJA Tax Cuts And Jobs Act Of 2017, Change In Tax Rate, Regulatory Liabilities, Income Tax Benefit Tax Cuts And Jobs Act Of 2017, Change In Tax Rate, Regulatory Liabilities, Income Tax Benefit Virginia Tax Equity Interest Virginia Tax Equity Interest [Member] Virginia Tax Equity Interest CURRENT ASSETS CURRENT ASSETS Current Assets Assets, Current [Abstract] Capitalized Cost of Utility Plant Public Utility Property, Plant, and Equipment [Table Text Block] TOTAL LIABILITIES AND EQUITY Liabilities and Equity LTIP LTIP [Member] LTIP [Member] Unamortized investment tax credits Deferred Tax Liabilities, Investment in Noncontrolled Affiliates Common equity ratio Common Equity Ratio, Percentage Common Equity Ratio, Percentage Pension and other postretirement benefits deferrals Pension And Other Post Retirement Benefits Deferrals [Member] Regulatory Asset for reconciliation of actual pension and other postretirement benefit expenses to the level allowed in rates. NONCURRENT LIABILITIES Disposal Group, Including Discontinued Operation, Liabilities, Noncurrent [Abstract] Gas average excluding AMI Gas Excluding AMI [Member] Gas Excluding AMI [Member] OTHER INCOME (DEDUCTIONS) OTHER INCOME (DEDUCTIONS) Other Nonoperating Income (Expense) [Abstract] Electric average excluding AMI Electric Excluding AMI [Member] Electric Excluding AMI [Member] Gross Amounts of Recognized Assets/ (Liabilities) Gross Amounts of Recognized Assets (Liabilities) Gross Amounts of Recognized Assets Liabilities Real Estate and Other Alternatives Employee Benefit Plan, Real Estate [Member] Fair value of derivative assets Offsetting Derivative Assets [Abstract] Other Deferred Tax Assets, Other Investment Holdings [Table] Credit Derivative [Table] Regulatory assets, recovery period Regulatory Assets, Recovery Period Regulatory Assets, Recovery Period Equity Method Investment [Table] Equity Method Investment [Table] General Business Tax Credit General Business Tax Credit Carryforward [Member] Commingled Trust Fund Defined Benefit Plan, Commingled Trust Fund [Member] Defined Benefit Plan, Commingled Trust Fund Capital expenditures Segment, Expenditure, Addition to Long-Lived Assets Accounting Policies [Abstract] Accounting Policies [Abstract] Public Utility [Axis] Public Utility [Axis] Accrued taxes Accrued taxes Accrued taxes to affiliated companies Increase (Decrease) in Property and Other Taxes Payable Natural Gas Natural Gas Derivative [Member] Natural Gas Derivative [Member] Schedule of Operating Leases, Future Minimum Lease Payments Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block] Other revenue sources Public Utilities, Potential Incentive Related To Service Termination Public Utilities, Potential Incentive Related To Service Termination Treasury Stock Treasury Stock, Common [Member] Pay vs Performance Disclosure [Line Items] Total Operating Lease, Liability All years thereafter Lessee, Operating Lease, Liability, to be Paid, after Rolling Year Five Year 6 Rate Plan For Year 6 [Member] Rate Plan For Year 6 [Member] Depreciation and amortization Depreciation and amortization Depreciation and amortization Depreciation, Depletion and Amortization, Nonproduction Amount employee contribution for employer match Share Based Compensation Arrangement By Share Based Payment Award Contribution Amount By Employee For Matching Share-based Compensation Arrangement by Share-based Payment Award, contribution amount by employee for matching Factor used for adjustment of Performance awards, low end (percent) Share Based Compensation Arrangement By Share Based Payment Award Performance Rsu S Factor Used Low Range Share-based Compensation Arrangement by Share-based Payment Award, Performance RSU's, Factor used, low range Netting Adjustment Fair Value, Concentration of Risk, Market Risk Management, Reporting Date Value at Risk [Member] Other noncurrent liabilities Other Liabilities, Noncurrent Site Contingency [Table] Site Contingency [Table] Period [Domain] Period [Domain] [Domain] for Period [Axis] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] Non-utility property, net accumulated depreciation of $25 in 2025 and 2024 Disposal Group, Including Discontinued Operation, Property, Plant And Equipment, Non-Utility Plant, Net, Noncurrent Tangible assets that are held by an entity for use other than utility production; net of accumulated depreciation. Storm reserve passback Storm Reserve Passback [Member] Storm Reserve Passback Variable Interest Entity [Table] Variable Interest Entity [Table] Return on regulatory assets Return On Regulatory Assets Return On Regulatory Assets Less: Long-term debt due within one year Long-Term Debt, Current Maturities Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount Employer contributions Defined Benefit Plan, Plan Assets, Contributions by Employer COMPREHENSIVE INCOME Comprehensive Income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Measurement Input Type [Axis] Measurement Input Type [Axis] 2030 Contractual Obligation, to be Paid, Year Five Disposal Group Name [Domain] Disposal Group Name [Domain] Name Measure Name Number of miles in pipeline construction Number Of Miles In Pipeline Construction Number Of Miles In Pipeline Construction Expected return on plan assets (percent) Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets 2027 Lessee, Operating Lease, Liability, to be Paid, Rolling Year Two Total investments Defined Benefit Plan, Investments [Member] Defined Benefit Plan, Investments [Member] Schedule of Estimated Capacity and Other Fixed Payments Schedule Of Fixed Capacity Payment Commitments Table [Table Text Block] Schedule Of Fixed Capacity Payment Commitments Table [Text Block] CURRENT LIABILITIES Disposal Group, Including Discontinued Operation, Liabilities, Current [Abstract] Income Tax Contingency [Table] Income Tax Contingency [Table] TOTAL DEBENTURES TOTAL Long-Term Debt Legal Entity [Axis] Legal Entity [Axis] TOTAL ASSETS Total assets Assets INVESTING ACTIVITIES INVESTING ACTIVITIES Cash Provided by (Used in) Investing Activity, Continuing Operation [Abstract] Future income tax Deferred Income Tax Charge [Member] Total deferred or recognized gains (losses) Deferred Gain Loss Liability Deferred gain/(loss), liability Capitalization Capitalization [Text Block] Capitalization [Text Block] Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Deferred derivative losses, current, recovery period (in years) Regulatory Assets, Deferred Derivative Losses, Current, Recovery Period Regulatory Assets, Deferred Derivative Losses, Current, Recovery Period Pension and other postretirement benefit plan liability adjustments, net of taxes Pension and other postretirement benefit plan liability adjustments, net of taxes Accumulated Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax Fair Value, Concentration of Risk [Table] Fair Value, Concentration of Risk [Table] Cost of the program, recovery period Contract With Customer, Cost Of Program, Recovery Period Contract With Customer, Cost Of Program, Recovery Period Regulatory Liability [Axis] Regulatory Liability [Axis] Federal Income Tax/State Income Tax Income Tax, Policy [Policy Text Block] Allowance for cost of removal less salvage Asset Retirement Obligation Costs [Member] Receivable Type [Axis] Receivable Type [Axis] R&D credit and ITC amortization Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent SUPPLEMENTAL DISCLOSURE OF CASH INFORMATION SUPPLEMENTAL DISCLOSURE OF CASH INFORMATION Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract] Other regulatory assets Deferred Tax Liabilities Other Regulatory Assets Deferred tax liabilities other regulatory assets. Payment Guarantee by CET Electric of Contributions to New York Transco LLC Payment Guarantee by CET Electric of Contributions to New York Transco LLC [Member] Payment Guarantee by CET Electric of Contributions to New York Transco LLC [Member] Transferred (in dollars per share) Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Transfers, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Transfers, Weighted Average Grant Date Fair Value Private Equity Private Equity Funds [Member] Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Dividends Declared Per Share (in dollars per share) Common Stock, Dividends, Per Share, Declared Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Right-of-use asset obtained in exchange for operating lease liability Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Time-based restricted stock Time Based Restricted Stock [Member] Time Based Restricted Stock [Member] Pensions and retiree benefits obligations, net Pensions and retiree benefits obligations, net Increase (Decrease) in Obligation, Pension and Other Postretirement Benefits Revenue taxes Revenue Taxes [Member] Regulatory Asset for timing differences between taxes collected and paid by the Utilities to fund mass transportation. Level 2 Level 2 Fair Value, Inputs, Level 2 [Member] Document Financial Statement Error Correction [Flag] Document Financial Statement Error Correction [Flag] State income taxes, net of federal income taxes Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Schedule of Regulatory Assets Schedule of Regulatory Assets [Table Text Block] Short-Term Borrowing Short-Term Debt [Text Block] Equity method investments Equity method investment Equity Method Investments Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Business Combination [Domain] Business Combination [Domain] Schedule of Utilities Rate Plans Public Utilities General Disclosures [Table Text Block] Operating Leases Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] Related Party Related Party [Member] CHANGE IN PLAN ASSETS Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward] Aggregate fair value – net liabilities Credit Risk Derivatives, at Fair Value, Net Schedule of Components of Income Tax Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Plan Name [Axis] Plan Name [Axis] Plant and Depreciation Utility Plant / Non-Utility Plant Property, Plant and Equipment, Policy [Policy Text Block] Regulatory assets usefull life Regulatory Assets Usefull Life Regulatory Assets Usefull Life Document Information [Table] Document Information [Table] PEO PEO [Member] Net fair value derivative assets/(liabilities) Offsetting Derivative Assets and Liabilities [Abstract] Offsetting Derivative Assets and Liabilities [Abstract] Lease Contractual Term [Domain] Lease Contractual Term [Domain] Debenture 2019A, 3.73%, Due 2049 Debenture 2019A, 3.73 Percent, Due 2049 [Member] Debenture 2019A, 3.73 Percent, Due 2049 [Member] Recoverable Energy Costs/New York Independent System Operator (NYISO) Public Utilities, Policy [Policy Text Block] SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION SUPPLEMENTAL DISCLOSURE OF NON-CASH INFORMATION Noncash Investing and Financing Items [Abstract] Debenture Series 2018B, 4.35% Due 2048 Debenture Series 2018B, 4.350% Due 2048 [Member] Debenture Series 2018B, 4.350% Due 2048 [Member] Income Tax Paid, by Individual Jurisdiction [Line Items] Income Tax Paid, by Individual Jurisdiction [Line Items] New Jersey Board of Public Utilities New Jersey Board of Public Utilities [Member] New Jersey Board of Public Utilities Schedule of Total Excise Taxes Recorded in Operating Revenues Schedule Of Excise Taxes [Table Text Block] Schedule Of Excise Taxes [Table Text Block] CHANGES IN ASSETS AND LIABILITIES CHANGES IN ASSETS AND LIABILITIES Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Recoverable energy costs Recoverable Energy Costs [Member] Recoverable Energy Costs [Member] CURRENT ASSETS Disposal Group, Including Discontinued Operation, Assets, Current [Abstract] Property basis differences Deferred Tax Liabilities, Property, Plant and Equipment Charge to OCI Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), after Tax Retained Earnings Retained Earnings Retained Earnings [Member] Revenue from contracts with customer, late payment charges, annual cap, percent (in percent) Revenue From Contracts With Customer, Late Payment Charges, Annual Cap, Percent Revenue From Contracts With Customer, Late Payment Charges, Annual Cap, Percent Income Tax Jurisdiction [Axis] Income Tax Jurisdiction [Axis] General Public Utilities, Property, Plant and Equipment, General Public Utilities, Property, Plant and Equipment, General Share-based Payment Arrangement [Abstract] Share-Based Payment Arrangement [Abstract] BALANCE AT BEGINNING OF PERIOD BALANCE AT END OF PERIOD BALANCE AT BEGINNING OF PERIOD Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] Net Amounts of Assets/ (Liabilities) Derivative assets Fair Value of commodity derivatives Derivative Asset Estimated aggregate undiscounted potential liability related environmental contaminants (up to) Potential Undiscounted Liability For Environmental Loss Contingencies Gross Potential undiscounted liability for environmental loss contingencies gross. 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A noncurrent taxable temporary difference is a difference between the tax basis and the carrying amount of a noncurrent asset or liability in the financial statements prepared in accordance with generally accepted accounting principles. In a classified statement of financial position, an enterprise shall separate deferred tax liabilities and assets into a current amount and a noncurrent amount. Deferred tax liabilities and assets shall be classified as current or noncurrent based on the classification of the related asset or liability for financial reporting. A deferred tax liability or asset that is not related to an asset or liability for financial reporting, including deferred tax assets related to carryforwards, shall be classified according to the expected reversal date of the temporary difference. This is the remaining investment credit, which will reduce the cost of services collected from ratepayers by a ratable portion over the investment's regulatory life. 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[Member] Consolidated Edison Company of New York, Inc. 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Valuation allowance Deferred Tax Assets, Valuation Allowance Gas Gas Gas Transmission [Member] Debenture Series 2017A, 3.875% Due 2047 Debenture Series Two Thousand Seventeen A, Three Point Eight Seven Five Percent Due Two Thousand Forty Seven [Member] Debenture Series Two Thousand Seventeen A, Three Point Eight Seven Five Percent Due Two Thousand Forty Seven [Member] International Equity Defined Benefit Plan, Equity Securities, Non-US [Member] Financial Information by Business Segment Segment Reporting Disclosure [Text Block] Goodwill [Table] Goodwill [Table] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Pension and Other Postretirement Employee Benefit Deferrals Pension and Other Post Retirement Benefits Deferrals, Liabilities [Member] Pension and Other Post Retirement Benefits Deferrals, Liabilities [Member] Schedule of Fair Value of Plan Assets Schedule of Amounts Recognized in Balance Sheet [Table Text Block] Fair value of plan assets at beginning of year FAIR VALUE OF PLAN ASSETS AT END OF YEAR Investments value Total fair value of plan net assets Defined Benefit Plan, Plan Assets, Amount New York City New York City [Member] New York City [Member] Current Current Federal Tax Expense (Benefit) Debenture 2021A, 2.40%, Due 2031 Debenture 2021A, 2.40 Percent, Due 2031 [Member] Debenture 2021A, 2.40 Percent, Due 2031 Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Rolling average calculation of income available for dividends (years) Rolling Average Calculation Of Income Available For Dividends Rolling average calculation of income available for dividends Increase (decrease) in regulatory liabilities Increase (Decrease) in Regulatory Liabilities Schedule of Total Periodic 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Assets [Member] Derivative Financial Instruments Non Current Assets [Member] Schedule of Capitalization [Table] Schedule of Capitalization [Table] Debenture Series 2023B, 5.50% Due 2034 Debenture Series Two Thousand Twenty Three B Five Point Five Zero Percent Due Two Thousand Thirty Four [Member] Debenture Series Two Thousand Twenty Three B Five Point Five Zero Percent Due Two Thousand Thirty Four Weighted average grant date price per share (in dollars per share) Granted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Interest cost on projected benefit obligation Interest cost on projected benefit obligation Interest cost on accumulated other postretirement benefit obligation Defined Benefit Plan, Interest Cost Related Party [Axis] Related and Nonrelated Parties [Axis] Restatement Determination Date: Restatement Determination Date [Axis] Gross 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INTEREST EXPENSE (INCOME) INTEREST EXPENSE (INCOME) Interest Expense, Operating and Nonoperating [Abstract] Earnings Per Common Share Earnings Per Share, Policy [Policy Text Block] Non-utility property, less accumulated depreciation Non-utility property, net accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Accretion expense Asset Retirement Obligation, Accretion Expense Utility capital expenditures Payments for Construction in Process Total Finance Lease, Liability, Including Held-For-Sale Amounts Finance Lease, Liability, Including Held-For-Sale Amounts Equity in earnings of subsidiaries Income (Loss) from Subsidiaries, Net of Tax Gas Leak Backlog, Leak Prone Pipe and Service Terminations Leaks And Service Terminations [Member] Leaks And Service Terminations [Member] Schedule of Environmental Remediation Costs Environmental Remediation Costs Incurred Related To Super Fund Sites [Table Text Block] Environmental Remediation Costs Incurred Related To Super Fund Sites [Table Text Block] Gross Amounts Offset Derivative Liability, Subject to Master Netting Arrangement, Asset Offset All Executive Categories All Executive Categories [Member] Schedule of Differences on Deferred Tax Assets and Liabilities Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Common stock, $0.10 par value, 500 shares authorized, shares outstanding of 361 and 347, respectively Common stock, $2.50 par value, 340000000 shares authorized, shares outstanding of 235000000 Common Stock, Value, Issued Segment Reporting, as if Old Segmentation Basis [Axis] Segment Reporting, as if Old Segmentation Basis [Axis] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table] Income tax benefit to be credited to customers resulting from TCJA Tax Cuts And Jobs Act Of 2017, Income Tax Credit Tax Cuts And Jobs Act Of 2017, Income Tax Credit Over Three Years Over Three Years [Member] Over Three Years COMMITMENTS, CONTINGENCIES, AND GUARANTEES (Note B, Note G, and Note H) COMMITMENTS AND CONTINGENCIES (Note B, Note G and Note H) Commitments and Contingencies Failure to pay, maximum aggregate limit Debt Instrument, Covenant Compliance, Maximum Aggregate Limit Of Failure To Pay Debt Or Derivative Obligations Debt Instrument, Covenant Compliance, Maximum Aggregate Limit Of Failure To Pay Debt Or Derivative Obligations Schedule of Capacity, Energy and Other Fixed Payments Estimated Aggregate Amounts Of Minimum Fixed Payments On Purchase And Service Obligations Table [Table Text Block] Estimated Aggregate Amounts Of Minimum Fixed Payments On Purchase And Service Obligations Table [Text Block] Fair Value Measured at Net Asset Value Per Share Fair Value Measured at Net Asset Value Per Share [Member] Business Combination [Axis] Business Combination [Axis] Other Superfund Sites Other Superfund Sites [Member] Other Superfund Sites Unconditional charitable contribution, accrued amount Unconditional Charitable Contribution, Accrued Amount Unconditional Charitable Contribution, Accrued Amount Non-controlling Interest Noncontrolling Interest [Member] Debenture Series 2016B, 2.90% Due 2026 Debenture Series 2016B, 2.90% Due 2026 [Member] Debenture Series 2016B, 2.90% Due 2026 [Member] Equity method investment, ownership percent (in percent) Equity Method Investment, Ownership Percentage New Financial Accounting Standards Accounting Standards Update and Change in Accounting Principle [Text Block] Short-term Debt [Line Items] Short-Term Debt [Line Items] Revenue decoupling mechanism liabilities Revenue Decoupling Mechanism [Member] Revenue Decoupling Mechanism [Member] Deferred tax assets Deferred Tax Assets, Net Public utilities, rate adjustment mechanism Public Utilities, Rate Adjustment Mechanism Public Utilities, Rate Adjustment Mechanism Other deductions Other deductions Other Nonoperating Expense Project [Axis] Project [Axis] PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Plan Assets Percentage (percent) Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage Total fair value of derivative assets Derivative Financial Instruments, Assets [Member] Capital contribution by Con Edison Adjustments to Additional Paid in Capital, Contributions by Parent Adjustments to Additional Paid in Capital, Contributions by Parent Schedule of Accrued Liability for Asbestos Suits and Workers' Compensation Proceedings Accrued Liabilities For Asbestos Suits And Workers Compensation Proceedings [Table Text Block] Accrued liabilities for asbestos suits and workers compensation proceedings. Revenue from Contract with Customer [Abstract] Long-term debt due within one year Disposal Group, Including Discontinued Operation, Long-term Debt, Current Disposal Group, Including Discontinued Operation, Long-term Debt, Current Unbilled contract revenue Change in Contract with Customer, Asset [Abstract] Scenario [Axis] Scenario [Axis] Schedule of Unrecognized Tax Benefits Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] Debenture Series 2005 B 5.25% Due 2035 Debenture Series 2005 B 5.25% Due 2035 [Member] Debenture Series 2005 B 5.25% Due 2035 March 2023 Credit Agreement Variable Rate 364 Day Revolving Credit Agreement March 2023 Credit Agreement Variable Rate 364 Day Revolving Credit Agreement [Member] March 2023 Credit Agreement Variable Rate 364 Day Revolving Credit Agreement Amortization to income of net regulatory assets Amortization to income of net regulatory assets Amortization of Regulatory Asset Disposal of the Clean Energy Businesses Noncontrolling Interest, Decrease From Disposal Of Noncontrolling Interests Noncontrolling Interest, Decrease From Disposal Of Noncontrolling Interests CASH, TEMPORARY CASH INVESTMENTS, AND RESTRICTED CASH: CASH AND TEMPORARY CASH INVESTMENTS Cash and Cash Equivalent [Abstract] Schedule of Capitalization, Long-term Debt [Table] Capitalization, Long-Term Debt [Table] Derivative Contract [Domain] Derivative Contract [Domain] Proceeds from issuance of common stock Issuance of common shares - public offering Proceeds from Issuance of Common Stock 2030 Defined Benefit Plan, Expected Future Benefit Payment, Year Five Recovery of late payment charges, return on equity threshold rate Public Utilities, Recovery Of Late Payment Charges, Return On Equity Threshold Rate Public Utilities, Recovery Of Late Payment Charges, Return On Equity Threshold Rate All Individuals All Individuals [Member] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Performance RSUs Performance-based Restricted Stock Units [Member] Performance-based Restricted Stock Units [Member] Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Name Forgone Recovery, Individual Name Subtractions Unbilled Contracts Receivable, Decrease From Billings Unbilled Contracts Receivable, Decrease From Billings Other interest expense Other interest expense Interest Expense (Income), Other, Net Interest Expense (Income), Other, Net Regulatory Agency [Domain] Regulatory Agency [Domain] Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Accounts payable from (to) affiliated companies Increase (Decrease) in Due to Affiliates Number of registrants Number of Registrants Number of Registrants Disposal Group Classification [Axis] Disposal Group Classification [Axis] Issuance of common shares for stock plans Issuance of common shares for stock plans, net of repurchases Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Including Option Exercised 2013 LTIP 2013 LTIP [Member] 2013 LTIP [Member] Increase (decrease) in regulatory liabilities Increase (Decrease) in Regulatory Assets and Liabilities Production Tax Credit   Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Percent Equity Method Investee Equity Method Investee [Member] Debenture 2024B, 5.70%, Due 2054 Debenture 2024B, 5.70 Percent, Due 2054 [Member] Debenture 2024B, 5.70 Percent, Due 2054 Guarantor Obligations, Term [Axis] Guarantor Obligations, Term [Axis] Guarantor Obligations, Term [Axis] Equity Securities Equity Securities Equity Defined Benefit Plan, Equity Securities [Member] Schedule of Hedged Volume of Derivative Transactions Schedule of Derivative Instruments [Table Text Block] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Annual gas revenue requirement Annual Gas Revenue Requirement Annual Gas Revenue Requirement Intangible Asset, Finite-Lived [Table] Intangible Asset, Finite-Lived [Table] Mountain Valley Pipeline LLC Mountain Valley Pipeline Mountain Valley Pipeline LLC [Member] Mountain Valley Pipeline LLC [Member] Lessee, Lease, Description [Line Items] Lessee, Lease, Description [Line Items] Subtractions Contract with Customer, Liability, Decrease From Billings Contract with Customer, Liability, Decrease From Billings Asset retirement obligations Deferred Tax Assets Asset Retirement Obligations Deferred Tax Assets Asset Retirement Obligations Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Net deferred tax liabilities Deferred Tax Liabilities, Excluding Investment in Noncontrolled Affiliates, Net Deferred Tax Liabilities, Excluding Investment in Noncontrolled Affiliates, Net Pension and other postretirement benefit plan liability adjustments, net of taxes Pension and other postretirement benefit plan liability adjustments, net of taxes Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent Tax credits carryforward Deferred Tax Assets, Tax Credit Carryforwards Debenture 2016A, 3.85%, Due 2046 Debenture 2016A, 3.85 Percent, Due 2046 [Member] Debenture 2016A, 3.85 Percent, Due 2046 [Member] Electricity Electricity Swaps [Member] Electricity Swaps [Member] Number of people died in explosion and fire incident Number of People Died in Explosion and Fire Incident Number of people died in explosion and fire incident. Forward Capacity Prices Measurement Input, Commodity Forward Capacity Price [Member] Measurement Input, Commodity Forward Capacity Price [Member] Environmental Remediation Expense, Statement of Income or Comprehensive Income [Extensible Enumeration] Environmental Remediation Expense, before Recovery, Statement of Income or Comprehensive Income [Extensible Enumeration] Refundable energy costs current Refundable Energy Cost Current [Member] Refundable Energy Cost - Current [Member] Scenario, Forecast Forecast [Member] Average depreciation rates (percent) Public Utilities, Property, Plant and Equipment, Disclosure of Composite Depreciation Rate for Plants in Service Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] > 10 years Guarantee Duration Four To Ten Years [Member] Guarantee Duration Four To Ten Years [Member] Title of 12(b) Security Title of 12(b) Security Lessee, Lease, Description [Table] Lessee, Lease, Description [Table] Disposal Groups, Including Discontinued Operations [Table] Disposal Groups, Including Discontinued Operations [Table] Capital stock expense Capital Stock Expense Capital Stock Expense Superfund and other environmental costs Superfund and other environmental costs Accrued Liabilities: Accrued Environmental Loss Contingencies, Noncurrent Auditor Information [Abstract] Auditor Information Pension liability Liability, Defined Benefit Pension Plan TOTAL OTHER INCOME Other Income (deductions) Nonoperating Income (Expense) Ownership interest (in percent) Subsidiary, Ownership Percentage, Parent Debenture 2019A, 4.125%, Due 2049 Debenture 2019A, 4.125 Percent, Due 2049 [Member] Debenture 2019A, 4.125 Percent, Due 2049 [Member] Number of solar projects Number Of Solar Projects Number Of Solar Projects MTA Surcredit amortization, net of federal income taxes Effective Income Tax Rate Reconciliation, Nondeductible Expense, MTA Surcredit Amortization Of Excess Deferred Federal Income Taxes, Amount Effective Income Tax Rate Reconciliation, Nondeductible Expense, MTA Surcredit Amortization Of Excess Deferred Federal Income Taxes, Amount Debenture 2024A, 5.375 %, Due 2054 Debenture 2024A, 5.375 Percent, Due 2054 [Member] Debenture 2024A, 5.375 Percent, Due 2054 UTILITY PLANT, AT ORIGINAL COST UTILITY PLANT, AT ORIGINAL COST Public Utilities, Property, Plant and Equipment [Abstract] Tax credit carryovers Tax Credit Carryforward, Amount 2026 Contractual Obligation, to be Paid, Year One All years thereafter Finance Lease, Liability, to be Paid, after Rolling Year Five Downward price adjustment Disposition Of Stock In Subsidiary, Downward Price Adjustment Disposition Of Stock In Subsidiary, Downward Price Adjustment Investment plan Public Utilities, Infrastructure Investment Plan Public Utilities, Infrastructure Investment Plan Recovery of late payment charges, amount Public Utilities, Recovery Of Late Payment Charges, Amount Public Utilities, Recovery Of Late Payment Charges, Amount Adjustment percentage used for Performance awards (in percent) Share Based Compensation Arrangement By Share Based Payment Award Performance Rsu S Adjustment Percentage Share-based Compensation Arrangement by Share-based Payment Award, Performance RSU's, adjustment percentage Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] Common stock repurchases (in shares) Treasury Stock, Shares, Acquired Transferred (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Transferred, Weighted Average Grant Date Fair Value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Transferred, Weighted Average Grant Date Fair Value Schedule of Changes in Status of Performance RSUs Nonvested Restricted Stock Shares Activity [Table Text Block] Debenture 2015A, 4.50%, Due 2045 Debenture 2015A, 4.50 Percent, Due 2045 [Member] Debenture 2015A, 4.50 Percent, Due 2045 [Member] Award Timing Disclosures [Line Items] Operating Loss Carryforwards [Line Items] Operating Loss Carryforwards [Line Items] Debenture Series 2023A, 5.20% Due 2033 Debenture Series Two Thousand Twenty Three A Five Point Two Zero Percent Due Two Thousand Thirty Three [Member] Debenture Series Two Thousand Twenty Three A Five Point Two Zero Percent Due Two Thousand Thirty Three Schedule of Change in Asset Retirement Obligation Schedule of Change in Asset Retirement Obligation [Table Text Block] Service cost – including administrative expenses Service cost Defined Benefit Plan, Service Cost Debenture 2025A, 5.75 Percent, Due 2055 Debenture 2025A, 5.75 Percent, Due 2055 [Member] Debenture 2025A, 5.75 Percent, Due 2055 Measurement Frequency [Domain] Measurement Frequency [Domain] Recoveries Accounts Receivable, Allowance for Credit Loss, Recovery Lease, renewal term (in years) Lessee, Operating Lease, Renewal Term Unrecognized prior service credits Unrecognized prior service costs Defined Benefit Plan Unrecognized Prior Service Costs Defined Benefit Plan, Unrecognized prior service costs Number of tax equity projects Number Of Tax Equity Projects Number Of Tax Equity Projects Deferred Deferred State and Local Income Tax Expense (Benefit) Transmission Public Utilities, Property, Plant and Equipment, Transmission Debenture 2009B, 6.00%, Due 2039 Debenture 2009B, 6.00 Percent, Due 2039 [Member] Debenture 2009B, 6.00 Percent, Due 2039 [Member] Cash Value of Life Insurance Policies Fair Value, Concentration of Risk, Cash Surrender Value NET INCOME FOR COMMON STOCK NET INCOME Net Income (Loss) Attributable to Parent NONCURRENT LIABILITIES NONCURRENT LIABILITIES Liabilities, Noncurrent [Abstract] NET UTILITY PLANT Public Utilities, Property, Plant and Equipment, Net Period of liquidation (in years) Fair Value, Investments, Liquidating Investment, Period Of Liquidation Fair Value, Investments, Liquidating Investment, Period Of Liquidation Negative revenue adjustments Potential Penalty Expense Potential Penalty Expense Debenture Series 2016A. 3.88% Due 2046 Debenture Series 2016A. 3.88% Due 2046 [Member] Debenture Series 2016A. 3.88% Due 2046 [Member] Debenture Series 2017B, 4.825% Due 2027 Debenture Series Two Thousand Seventeen B Four Point Eight Two Five Percent Due Two Thousand Twenty Seven [Member] Debenture Series Two Thousand Seventeen B Four Point Eight Two Five Percent Due Two Thousand Twenty Seven Schedule of Income Tax Reconciliation Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Award vesting period (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Accounts Receivable, Allowance for Credit Loss [Roll Forward] Accounts Receivable, Allowance for Credit Loss [Roll Forward] Deferred tax assets, tax credit carryforwards, general business Deferred Tax Assets, Tax Credit Carryforwards, General Business Other Effective Income Tax Rate Reconciliation, Other Adjustments, Percent Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] State State and Local Income Tax Expense (Benefit), Continuing Operations [Abstract] Repurchase of common shares Repurchase of common shares Payments for Repurchase of Common Stock Adoption Date Trading Arrangement Adoption Date Reclassification Reclassification, Comparability Adjustment [Policy Text Block] Debenture 2024B, 5.700 %, Due 2054 Debenture 2024B, 5.700 Percent, Due 2054 [Member] Debenture 2024B, 5.700 Percent, Due 2054 Accrued unbilled revenue Accrued unbilled revenue Contract with Customer, Asset, after Allowance for Credit Loss Regulatory Assets Current Regulatory Assets Current [Member] Deferred Derivative Losses [Member] Schedule of Accrued Liabilities and Regulatory Assets Accrued Liabilities And Regulatory Assets [Table Text Block] Accrued Liabilities And Regulatory Assets [Table Text Block] Lease, term (in years) Lessee, Operating Lease, Term of Contract Customer [Axis] Customer [Axis] Debenture 2020B, 3.95%, Due 2050 Debenture 2020B, 3.95 Percent, Due 2050 [Member] Debenture 2020B, 3.95 Percent, Due 2050 FINANCING ACTIVITIES FINANCING ACTIVITIES Cash Provided by (Used in) Financing Activity, Continuing Operation [Abstract] OPERATING INCOME OPERATING INCOME Operating income Operating Income (Loss) Schedule of Offsetting of Liabilities Offsetting Liabilities [Table Text Block] Pension and Other Postretirement Benefits Compensation Related Costs, Policy [Policy Text Block] Retained earnings Retained Earnings (Accumulated Deficit) Schedule of Funded Status Schedule of Net Funded Status [Table Text Block] Revenue decoupling mechanism receivable Revenue decoupling mechanism receivable Revenue Decoupling Mechanism Receivable Revenue Decoupling Mechanism Receivable Debenture 2021B, 3.60%, Due 2061 Debenture 2021B, 3.60 Percent, Due 2061 [Member] Debenture 2021B, 3.60 Percent, Due 2061 Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] System benefit charge carrying charge System Benefit Charge Carrying Charge [Member] System Benefit Charge Carrying Charge [Member] Repayment under term loan Repayments of Medium-Term Note Held for future use Plant Held for Future Use Amount Subsequent Event Type [Domain] Subsequent Event Type [Domain] Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Other Deferred Tax Liabilities, Other Liabilities held for sale TOTAL CURRENT LIABILITIES Disposal Group, Including Discontinued Operation, Liabilities, Current Investment Holdings [Line Items] Credit Derivatives [Line Items] 2029 Contractual Obligation, to be Paid, Year Four Retirement Plan Type [Axis] Retirement Plan Type [Axis] Other income (deductions) Other Nonoperating Income (Expense) Statement [Table] Statement [Table] Actual return on plan assets Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss) Deferred income taxes Deferred income taxes Deferred Income Tax Expense (Benefit) PRINCIPAL NON-CASH CHARGES (CREDITS) TO INCOME PRINCIPAL NON-CASH CHARGES (CREDITS) TO INCOME Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Negative revenue adjustments Impact On Earnings Had Lag Period Been Adjusted Impact On Earnings Had Lag Period Been Adjusted Nontaxable or Nondeductible items Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent Segment Reporting, as if Old Segmentation Basis [Domain] Segment Reporting, as if Old Segmentation Basis [Domain] Other receivables Other Receivables [Member] Other Receivables [Member] Tropical Storm Henri Tropical Storm Henri [Member] Tropical Storm Henri Debenture Series 2024 D 5.125% Due 2035 Debenture Series 2024 D 5.125% Due 2035 [Member] Debenture Series 2024 D 5.125% Due 2035 Revenue decoupling mechanisms Beginning balance Ending balance Contract with Customer, Liability Deferred derivative losses - short term Derivative Losses Current [Member] Regulatory Asset for deferral of change in fair value of derivative instrument. Deferred unamortized ITC recognized on sale of subsidiary  Effective Income Tax Rate Reconciliation, State Taxes On Sale Of Subsidiary, Percent Effective Income Tax Rate Reconciliation, State Taxes On Sale Of Subsidiary, Percent Other noncurrent liabilities Finance Lease, Liability, Noncurrent All Adjustments to Compensation All Adjustments to Compensation [Member] Electric Electric Electricity [Member] Amendment Flag Amendment Flag Income tax benefit Share-Based Payment Arrangement, Expense, Tax Benefit Number of shares of common stock that can be awarded under the plan (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized Other deferred credits and noncurrent liabilities Other deferred credits and noncurrent liabilities Deferred Credits and Other Liabilities, Noncurrent Other Postretirement Benefits Other Postretirement Benefits Plan [Member] Schedule of Plan Assets Allocations Schedule of Allocation of Plan Assets [Table Text Block] Condensed Income Statements,Captions [Line Items] Condensed Income Statements, Captions [Line Items] Recovery of late payment charges, period (in years) Public Utility, Recovery Of Late Payment Charges, Period Public Utility, Recovery Of Late Payment Charges, Period Treasury stock, $0.10 par value, 34 shares Repurchased Con Edison Stock Treasury Stock, Common, Value Termination Date Trading Arrangement Termination Date Environmental Exit Cost [Line Items] Environmental Exit Cost [Line Items] Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Receivable [Domain] Receivable [Domain] Energy services Energy Service [Member] Reflects regulatory liability amortization Reflects Regulatory Liability Amortization Reflects Regulatory Liability Amortization Weighted Average Discount Rate, Operating leases (percent) Operating Lease, Weighted Average Discount Rate, Percent Recovery or refund of energy costs, deferral period (in months) Public Utilities, Recovery Costs, Deferral Period One Public Utilities, Recovery Costs, Deferral Period One AVERAGE NUMBER OF SHARES OUTSTANDING — BASIC (in shares) Weighted average common shares outstanding – basic (in shares) Average Number Of Shares Outstanding—Basic (in shares) Weighted Average Number of Shares Outstanding, Basic New Jersey NEW JERSEY Unrecognized net gain Unrecognized net gain Defined Benefit Plan Unrecognized Net Loss Defined Benefit Plan, Unrecognized net loss Unearned revenue Change in Contract with Customer, Liability [Abstract] Investments, Including Funds For Retiree Health Benefit Investments, Including Funds For Retiree Health Benefit [Member] Investments, Including Funds For Retiree Health Benefit Related Party Transaction [Domain] Related Party Transaction [Domain] Segment Reporting [Abstract] Segment Reporting [Abstract] Cost of long-term debt Long-Term Debt, Percentage Bearing Variable Interest, Percentage Rate Debt Disclosure [Abstract] Debt Disclosure [Abstract] Defined Benefit Plan, Plan Assets, Category [Axis] Defined Benefit Plan, Plan Assets, Category [Axis] Scenario [Domain] Scenario [Domain] Debenture 2023A, 6.59%, Due 2053 Debenture 2023A, 6.59 Percent, Due 2053 [Member] Debenture 2023A, 6.59 Percent, Due 2053 Write-offs Accounts Receivable, Allowance for Credit Loss, Writeoff Income Tax Authority, Name [Axis] Income Tax Authority, Name [Axis] Fair value of derivative liabilities Offsetting Derivative Liabilities [Abstract] Annually Annually [Member] Annually [Member] Unamortized debt discount Unamortized debt discount Debt Instrument, Unamortized Discount Debenture Series 1997F, 6.50% Due 2027 Debenture Series One Thousand Nine Hundred And Ninety Sevenf Six Point Five Zero Percent Due Two Thousand Twenty Seven [Member] Debenture Series One Thousand Nine Hundred And Ninety Sevenf Six Point Five Zero Percent Due Two Thousand Twenty Seven [Member] Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Consolidated Entities [Axis] Consolidated Entities [Axis] Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Non-utility Non-Utility Products And Services [Member] Non-Utility Products And Services [Member] 2026 Finance Lease, Liability, to be Paid, Next Rolling 12 Months Other customer-provided capital rate Other Customer Provided Capital Rate Other Customer Provided Capital Rate Taxes receivable Tax receivable Income Taxes Receivable, Current Environmental remediation costs Deferred Tax Liabilities Environmental Remediation Costs Deferred tax liabilities environmental redemption costs. 2031-2035 Defined Benefit Plan, Expected Future Benefit Payment, after Year Five for Next Five Years Production Production [Member] Production [Member] Debenture Series 2007A, 6.30% Due 2037 Debenture Series Two Thousand Sevena Six Point Three Zero Percent Due Two Thousand Thirty Seven [Member] Debenture Series Two Thousand Seven A Six Point Three Zero Percent Due Two Thousand Thirty Seven [Member] Accounts receivable and other receivables - net allowance for uncollectible accounts Disposal Group, Including Discontinued Operation, Accounts, Notes and Loans Receivable, Net Debenture Series 2017C, 4.00% Due 2057 Debenture Series Two Thousand Seventeen C, Four Point Zero Zero Percent Due Two Thousand Fifty Seven [Member] Debenture Series Two Thousand Seventeen C, Four Point Zero Zero Percent Due Two Thousand Fifty Seven [Member] Cost of removal less salvage Payments for (Proceeds from) Removal Costs Schedule of Changes in Status of Time-Based Awards Summary of Changes in Status of Time Based Awards Table [Table Text Block] Summary of Changes in Status of Time Based Awards Table [Text Block] Estimates Use of Estimates, Policy [Policy Text Block] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Debenture 2020A, 2.02%, Due 2030 Debenture 2020A, 2.02 Percent, Due 2030 [Member] Debenture 2020A, 2.02 Percent, Due 2030 Total Regulatory Assets Regulatory assets Regulatory Asset Construction work in progress Construction in Progress, Gross New York Transco, LLC New York Transco, LLC [Member] New York Transco, LLC [Member] Debenture 2025A , 5.75%, Due 2055 Debenture 2025A , 5.75%, Due 2055 [Member] Debenture 2025A , 5.75%, Due 2055 Gross Amounts Offset Derivative Asset, Subject to Master Netting Arrangement, Liability Offset Insider Trading Arrangements [Line Items] Regulatory liabilities Regulatory liabilities Regulatory liabilities—current Regulatory Liability, Current Agreement [Axis] Agreement [Axis] Agreement Debenture Series 2018A, 3.80% Due 2028 Debenture Series 2018A, 3.800% Due 2028 [Member] Debenture Series 2018A, 3.800% Due 2028 [Member] Other revenues Product and Service, Other [Member] Excise taxes Excise Taxes Collected Total Liabilities Liabilities Long-term debt due within one year Long-term debt due within one year Other Long-Term Debt, Current Settlements Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements Investment income Investment and other income Investment Income, Net Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Additions based on tax positions related to the current year Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Estimated future employer contributions Expected contributions Defined Benefit Plan, Expected Future Employer Contributions, Next Fiscal Year Generating capacity per day (in dekatherms) Generating Capacity Per Day Generating Capacity Per Day Ratio of consolidated debt to consolidated total capital Debt Instrument, Covenant Compliance, Consolidated Debt To Consolidated Total Capital Ratio Debt Instrument, Covenant Compliance, Consolidated Debt To Consolidated Total Capital Ratio Debenture Series 2006A, 5.85% Due 2036 Debenture Series Two Thousand Sixa Five Point Eight Five Percent Due Two Thousand Thirty Six [Member] Debenture Series Two Thousand Six A Five Point Eight Five Percent Due Two Thousand Thirty Six [Member] Issuance of common shares - public offering Stock Issued During Period, Value, New Issues Consolidation Items [Axis] Consolidation Items [Axis] Unamortized debt expense Unamortized Debt Issuance Expense Operating lease liabilities Disposal Group, Including Discontinued Operation, Operating Lease Liabilities, Noncurrent Disposal Group, Including Discontinued Operation, Operating Lease Liabilities, Noncurrent Counterparty Name [Axis] Counterparty Name [Axis] Debenture Series 2014C, 4.625% Due 2054 Debenture 2014C , 4.625%, Due 2054 [Member] Debenture Series Two Thousand Fourteenc Four Point Six Two Five Percent Due Two Thousand Fifty Four [Member] Environmental remediation costs Environmental Restoration Costs [Member] Tax Credit Carryforward, Name [Domain] Tax Credit Carryforward, Name [Domain] Manufactured gas plant sites Manufactured Gas Plant Sites Natural Gas Processing Plant [Member] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Additional Collateral Required Due To Loss Of Unsecured Credit Additional Collateral Required Due To Loss Of Unsecured Credit [Member] Additional Collateral Required Due To Loss of Unsecured Credit [Member] Non-NEOs Non-NEOs [Member] Corporate Bonds Debt Corporate Debt Securities [Member] RECO Rockland Electric Company [Member] Rockland Electric Company Collateral posted Collateral Already Posted, Aggregate Fair Value