Trading Arrangements, by Individual
Trading Arrangements, by Individual [Table]
Trading Arrangement:
Trading Arrangement [Axis]
Purchases, sales, issuances and settlements
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases, (Sales), Issuances, (Settlements) [Abstract]
Maximum [Member]
Maximum [Member]
Alternative revenue programs
Alternative revenue programs [Member]
Alternative revenue programs
Portion at Fair Value Measurement [Member]
Portion at Fair Value Measurement [Member]
Short-term Debt, Type [Axis]
Short-Term Debt, Type [Axis]
Title of 12(b) Security
Title of 12(b) Security
Reported Value Measurement [Member]
Reported Value Measurement [Member]
Commitments And Contingencies Additional Narrative Information [Line Items]
Commitments And Contingencies Additional Narrative Information [Line Items]
Commitments And Contingencies Additional Narrative Information [Line Items]
Small commercial & industrial
Small Commercial & Industrial [Member]
Small Commercial & Industrial [Member]
Adjustment to Compensation, Amount
Adjustment to Compensation Amount
Schedule of Other Nonoperating Income, by Component
Schedule of Other Nonoperating Income, by Component [Table Text Block]
Schedule of Unrecognized Tax Benefits Roll Forward
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
Segment Reporting [Abstract]
Segment Reporting [Abstract]
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent
Retirement Benefits (All Registrants)
Retirement Benefits [Text Block]
Loss Contingency Accrual
Loss Contingency Accrual
Guarantor Obligations, Maximum Exposure, Undiscounted
Guarantor Obligations, Maximum Exposure, Undiscounted
Derivative, by Nature [Axis]
Derivative Instrument [Axis]
Derivative Instrument [Axis]
Nontaxable or nondeductible items
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount
Measurement Frequency [Axis]
Measurement Frequency [Axis]
Debt Instrument, Convertible, Conversion Price
Debt Instrument, Convertible, Conversion Price
Unrecognized Tax Benefits, Period Increase (Decrease)
Unrecognized Tax Benefits, Period Increase (Decrease)
Consolidated Entities [Axis]
Consolidated Entities [Axis]
Entity Common Stock Shares Outstanding
Entity Common Stock, Shares Outstanding
Debt Instrument, Convertible, Conversion Premium
Debt Instrument, Convertible, Conversion Premium
Debt Instrument, Convertible, Conversion Premium
AFUDC - Equity
AFUDC - Equity
Public Utilities, Allowance for Funds Used During Construction, Capitalized Cost of Equity
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Reclassification [Table]
Reclassification [Table]
Other comprehensive income, net of income taxes
Other Comprehensive Income (Loss), Net of Tax [Abstract]
Purchases of accounts receivable
Purchases of Accounts Receivable [Table Text Block]
Purchases of accounts receivable [Table Text Block]
Consolidated Entities [Domain]
Consolidated Entities [Domain]
Related Party Transactions (All Registrants)
Related Party Transactions Disclosure [Text Block]
Fair Value Assets And Liabilities Measured On Recurring Basis Financial Statement Captions [Line Items]
Fair Value Assets And Liabilities Measured On Recurring Basis Financial Statement Captions [Line Items]
Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. 0
Other Commitment, to be Paid, Year Four
Other Commitment, to be Paid, Year Four
Public Utility, Property, Plant and Equipment [Table]
Public Utility, Property, Plant and Equipment [Table]
Long-term incentive plan
Employee Benefit and Share-Based Payment Arrangement, Noncash
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Nature of Uncertainty [Domain]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Nature of Uncertainty [Domain]
Retirement Benefits [Abstract]
Retirement Benefits [Abstract]
Investments
Long-Term Investments
Outstanding Aggregate Erroneous Compensation Amount
Outstanding Aggregate Erroneous Compensation Amount
Collaborative Arrangement and Arrangement Other than Collaborative [Domain]
Collaborative Arrangement and Arrangement Other than Collaborative [Domain]
Number of reportable segments
Number of Reportable Segments
Total current liabilities
Total current liabilities
Liabilities, Current
Subsegments Consolidation Items [Axis]
Subsegments Consolidation Items [Axis]
Taxes other than income taxes
Taxes, Miscellaneous
Taxes, Miscellaneous
Schedule of Derivative Instruments
Schedule of Derivative Instruments [Table Text Block]
Mark-to-market derivative liabilities
Mark-to-market derivative liabilities (current liabilities)
Derivative Liability, Current
Short-term Debt, Type [Domain]
Short-Term Debt, Type [Domain]
Entity Address, City or Town
Entity Address, City or Town
Error Correction, Other
Error Correction, Other [Member]
Total mark-to-market derivative net assets (liabilities)
Derivative, Fair Value, Net
Statement of Financial Position [Abstract]
Statement of Financial Position [Abstract]
Energy efficiency and demand response programs
Energy Efficiency and Demand Response Programs [Member]
Energy Efficiency and Demand Response Programs
Equity Distribution Agreement
Equity Distribution Agreement
Equity Distribution Agreement
Interest Rate Derivative Assets
Interest Rate Derivative Assets [Member]
Interest Rate Derivative Assets
Peer Group Total Shareholder Return Amount
Peer Group Total Shareholder Return Amount
Inventories, net
Inventory, net
Inventory, Net [Abstract]
Proceeds from employee stock plans
Proceeds from Stock Plans
Fair Value, Inputs, Level 2 [Member]
Fair Value, Inputs, Level 2 [Member]
Other income and (deductions)
Nonoperating Income (Expense) [Abstract]
Total Shareholder Return Vs Peer Group
Total Shareholder Return Vs Peer Group [Text Block]
Distributions to member
Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Declared
Fair Value Reconciliation of Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Table Text Block]
This element represents, for the fair value measurement of assets and liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes during the period attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (net); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs).
Other comprehensive income
Other comprehensive income, net of income taxes
Other Comprehensive Income (Loss), Net of Tax
Non-Rule 10b5-1 Arrangement Terminated
Non-Rule 10b5-1 Arrangement Terminated [Flag]
Effective Income Tax Rate Reconciliation, Tax Credit, Percent
Effective Income Tax Rate Reconciliation, Tax Credit, Percent
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]
Contributions from parent
Adjustments to Additional Paid in Capital, Other
Schedule of Long-term Debt Instruments [Table]
Schedule of Long-Term Debt Instruments [Table]
Schedule of Energy Efficiency Formula Rate Updates [Line Items]
Schedule of Energy Efficiency Formula Rate Updates [Line Items]
Schedule of Energy Efficiency Formula Rate Updates [Line Items]
Tax Refunds
Tax Refunds [Member]
Tax Refunds
Total realized / unrealized gains (losses)
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Liability Gain Loss [Abstract]
This element represents total gains or losses for the period (realized and unrealized), arising from assets and liabilities measured at fair value on a recurring basis using unobservable inputs (Level 3).
Analysis and reconciliation of reportable segment information
Segment Reporting [Table Text Block]
FMB360DueJan2031
FMB360DueJan2031 [Member]
FMB360DueJan2031
Related Party [Axis]
Related and Nonrelated Parties [Axis]
Annual Reconciliation Increase (Decrease)
Revenue
Expected adjustment to revenue to be recorded in the prior year.
Public Utilities, Amount of Allowance for Earnings on Equity Capitalized for Rate Making Purposes
Public Utilities, Amount of Allowance for Earnings on Equity Capitalized for Rate Making Purposes
Document Period End Date
Document Period End Date
Amount
Debt Instrument, Face Amount
PHI Merger Commitments
Long-Term Purchase Commitment [Table Text Block]
Exelon Business Services Co Affiliate
Exelon Business Services Co Affiliate [Member]
Exelon Business Services Co Related Party Affiliate
Long-term incentive plan activity
Shares Issued, Value, Share-Based Payment Arrangement, before Forfeiture
Accumulated other comprehensive loss, net
Accumulated Other Comprehensive Income (Loss), Net of Tax
Accumulated Other Comprehensive Income (Loss), Net of Tax
Entity Shell Company
Entity Shell Company
Consolidation Items [Domain]
Consolidation Items [Domain]
Schedule of Forward Contracts Indexed to Issuer's Equity
Schedule of Forward Contracts Indexed to Issuer's Equity [Table Text Block]
Schedule of Forward Contracts Indexed to Issuer's Equity
Allowance for credit loss rollforward
Accounts Receivable, Allowance for Credit Loss [Table Text Block]
Increase (Decrease) in Obligation, Other Postretirement Benefits
Increase (Decrease) in Obligation, Other Postretirement Benefits
Unbilled customer revenue
Unbilled Contracts Receivable
Earnings Per Share [Abstract]
Earnings Per Share [Abstract]
Document Fiscal Period Focus
Document Fiscal Period Focus
Renewable energy credit obligations
Renewable Energy Credit Obligation, Current
Renewable Energy Credit Obligation, Current
Peer Group Issuers, Footnote
Peer Group Issuers, Footnote [Text Block]
Total liabilities
Total liabilities
Liabilities
Trading Symbol
Trading Symbol
Capital expenditures
Payments to Acquire Property, Plant, and Equipment
Schedule of Interest Rate Derivatives
Schedule of Interest Rate Derivatives [Table Text Block]
Company Selected Measure Name
Company Selected Measure Name
ATM Forward Contracts Not Settled [Table]
Schedule of 2025 ATM Forward Contracts Not Settled [Table Text Block]
ATM Forward Contracts Not Settled [Table]
Income Tax Disclosure [Abstract]
Income Tax Disclosure [Abstract]
Debt Instrument, Convertible Terms of Conversion [Domain]
Debt Instrument, Convertible Terms of Conversion [Domain]
Debt Instrument, Convertible Terms of Conversion [Domain]
Tax Year 2025
Tax Year 2025 [Member]
Cash, restricted cash, and cash equivalents - Held for Sale
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Discontinued Operation
Electric Distribution Formula Rate Asset
Electric Distribution Formula Rate Annula Reconciliations [Member]
Electric Distribution Formula Rate Annula Reconciliations
Environmental Liability - Anacostia
Environmental Liability - Anacostia
Environmental Liability - Anacostia
Credit Facility [Domain]
Credit Facility [Domain]
Cash flows from operating activities
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]
Other accounts receivable, net
Other accounts receivable, net
Other Receivables, Net, Current
Legislative Energy Relief Refund
Legislative Energy Relief Refund [Member]
Legislative Energy Relief Refund
Equity Valuation Assumption Difference, Footnote
Equity Valuation Assumption Difference, Footnote [Text Block]
Transfers out of Level 3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3
Line of Credit Facility [Table]
Line of Credit Facility [Table]
Contract Liabilities [Roll Forward]
Movement in Deferred Revenue [Roll Forward]
Deferred income taxes and amortization of investment tax credits
Deferred Income Taxes and Tax Credits
Accounts receivable
Accounts Receivable, after Allowance for Credit Loss, Current [Abstract]
Collaborative Arrangement and Arrangement Other than Collaborative [Axis]
Collaborative Arrangement and Arrangement Other than Collaborative [Axis]
Tax Credit Carryforward, Name [Domain]
Tax Credit Carryforward, Name [Domain]
Public authorities & electric railroads
Public Authorities & Electric Railroads [Member]
Public Authorities & Electric Railroads [Member]
Other assets and liabilities
Increase (Decrease) in Other Operating Assets and Liabilities, Net
Award Timing Predetermined
Award Timing Predetermined [Flag]
Collateral (paid) received, net
Collateral (paid) received, net
Increase (Decrease) Cash Collateral from Counterparties
Adjustment To PEO Compensation, Footnote
Adjustment To PEO Compensation, Footnote [Text Block]
Fair Value, Inputs, Level 1 [Member]
Fair Value, Inputs, Level 1 [Member]
Effective Income Tax Rate Reconciliation, Tax Credit, Amount
Effective Income Tax Rate Reconciliation, Tax Credit, Amount
Unamortized energy contract liabilities
Energy Marketing Contract Liabilities, Noncurrent
Other deferred debits (noncurrent assets)
Derivative Asset, Noncurrent
Effective Income Tax Rate Reconciliation, Percent
Effective Income Tax Rate Reconciliation, Percent
Debt Instrument, Convertible, Conversion Ratio
Debt Instrument, Convertible, Conversion Ratio
2025
2025 [Member]
Period increase or decrease goes into effect 2025
Commonwealth Edison Co
Commonwealth Edison Co [Member]
Commonwealth Edison Co [Member]
Assumed exercise and/or distributions of stock-based awards (in shares)
Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements
Other allowance for credit losses
Allowance for Credit Loss, Receivable, Other, Current
PECO Energy Co 2026 Electric Distribution Rate Case
PECO Energy Co 2026 Electric Distribution Rate Case [Member]
PECO Energy Co 2026 Electric Distribution Rate Case
Regulated Operations [Abstract]
Regulated Operations [Abstract]
Discounted Cash Flow [Member]
Valuation, Income Approach [Member]
Debt Conversion Terms Two
Debt Conversion Terms Two [Member]
Debt Conversion Terms Two
Property, plant and equipment
Depreciation
Scenario [Domain]
Scenario [Domain]
Other Affiliate
Other Affiliates [Member]
Revenues from alternative revenue programs
True-up adjustments to decoupling mechanisms and formula rates
True-up Adjustments to Decoupling Mechanisms and Formula Rates
True-up Adjustments to Decoupling Mechanisms and Formula Rates
US Treasury (UST) Interest Rate
US Treasury (UST) Interest Rate [Member]
Fair Value Disclosures [Abstract]
Fair Value Disclosures [Abstract]
Debt Instrument, Name [Domain]
Debt Instrument, Name [Domain]
Long-term debt due within one year
Long-term debt due within one year
Long-Term Debt and Lease Obligation, Current
Reclassification, Type [Domain]
Reclassification, Type [Domain]
Dividends paid on common stock
Payments of Ordinary Dividends, Common Stock
Expiration Date
Trading Arrangement Expiration Date
InterestRateSwapNotional5YR
InterestRateSwapNotional5YR [Member]
InterestRateSwapNotional5YR
Increase in cash, restricted cash, and cash equivalents
Decrease in cash, restricted cash, and cash equivalents
(Decrease) increase in cash, restricted cash, and cash equivalents
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Excluding Exchange Rate Effect, Including Discontinued Operation
Hedging Relationship [Axis]
Hedging Relationship [Axis]
Transportation
Transportation [Member]
Transportation [Member]
Cash and Cash Equivalents, Fair Value Disclosure
Cash equivalents
Cash and Cash Equivalents, Fair Value Disclosure
Beginning balance
Ending balance
Equity, Including Portion Attributable to Noncontrolling Interest
Mgp Site Contingency Monitoring Count
Number Of Former Manufactured Gas Plant Sites
Number Of Former Manufactured Gas Plant Sites
Nonrelated Party
Nonrelated Party [Member]
Affiliated Entity
Affiliated Entity [Member]
Aggregate Pension Adjustments Service Cost
Aggregate Pension Adjustments Service Cost [Member]
Derivative [Table]
Derivative [Table]
Distribution Base Rate Case Proceedings [Line Items]
Distribution Base Rate Case Proceedings [Line Items]
Distribution Base Rate Case Proceedings [Line Items]
Issuance of common stock
Proceeds from Issuance of Common Stock
Common stock (in dollars)
Common Stock, No Par Value
Large commercial & industrial
Large Commercial & Industrial [Member]
Large Commercial & Industrial [Member]
Cash flows from investing activities
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract]
Related Party Transaction [Axis]
Related Party Transaction [Axis]
Accrued environmental liabilities
Schedule of Environmental Loss Contingencies by Site [Table Text Block]
Separation Cash Payment
Separation Cash Payment
Separation Cash Payment
Segments [Domain]
Segments [Domain]
Interest Rate Swap
Interest Rate Swap [Member]
Increase (Decrease) in Regulatory Liabilities
Increase (Decrease) in Regulatory Liabilities
2025
2024 [Member]
Period increase or decrease goes into effect 2024
Debt and Credit Agreements (All Registrants)
Debt Disclosure [Text Block]
Scenario [Axis]
Scenario [Axis]
PPA termination obligation
Contractual Obligation
PECO Energy Co
PECO Energy Co [Member]
PECO Energy Co
PEO Actually Paid Compensation Amount
PEO Actually Paid Compensation Amount
Secured Debt
Secured Debt [Member]
Schedule of Energy Efficiency Formula Rate Updates [Table]
Schedule of Energy Efficiency Formula Rate Updates [Table]
Schedule of Energy Efficiency Formula Rate Updates [Table]
Change in Unrecognized Tax Benefits, Percent
Change in Unrecognized Tax Benefits, Percent
Change in Unrecognized Tax Benefits, Percent
Fair Value Assets Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Table]
Fair Value Assets Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Table]
Summarization of information required and determined to be provided for purposes of reconciling beginning and ending balances of fair value measurements of assets and liabilities using significant unobservable inputs (Level 3). Such reconciliation, separately presenting changes during the period, at a minimum, may include: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issuances, and settlements (net); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs).
Total operating expenses
Costs and Expenses
Site Contingency [Table]
Site Contingency [Table]
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Liability Gain Loss Change In Collateral
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Liability Gain Loss Change In Collateral
Fair value measurement with unobservable inputs reconciliation recurring basis asset liability gain loss change in collateral.
Interest Rate
Debt Instrument, Interest Rate, Stated Percentage
Common stock dividends
Dividends, Common Stock, Cash
Membership Interest
Membership Interest [Member]
An ownership interest in a limited liability company.
Total shareholders’ equity
Total shareholders’ equity
Beginning Balance
Ending Balance
Equity, Attributable to Parent
Other Commitment, to be Paid, Year Two
Other Commitment, to be Paid, Year Two
Settlement charges
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement
Regulatory Matters Additional Narrative Information [Table]
Regulatory Matters Additional Narrative Information [Table]
Regulatory Matters Additional Narrative Information [Table]
Current Receivables From/Payables To Affiliates
Related Party Transactions - Current Receivables From/Payables To Affiliates [Table Text Block]
Related Party Transactions - Current Receivables From/Payables To Affiliates [Table Text Block]
Effective Income Tax Rate Reconciliation, Amortization Of Excess Deferred Taxes, Amount
Effective Income Tax Rate Reconciliation, Amortization Of Excess Deferred Taxes, Amount
Effective Income Tax Rate Reconciliation, Amortization Of Excess Deferred Taxes, Amount
District of Columbia 2023 Electric Distribution Base Rate Case
District of Columbia 2023 Electric Distribution Base Rate Case [Member]
District of Columbia 2023 Electric Distribution Base Rate Case
Prepaid pension asset
Prepaid pension asset
Assets for Plan Benefits, Defined Benefit Plan
Convertible Senior Notes [Table]
Convertible Senior Notes [Table]
Convertible Senior Notes [Table]
ASSETS
Assets [Abstract]
Requested Return on Equity, Percentage
Public Utilities, Requested Return on Equity, Percentage
Insider Trading Policies and Procedures [Line Items]
Customer allowance for credit losses
Accounts Receivable, Allowance for Credit Loss, Current
Regulatory assets
Regulatory Asset, Current
Tax Credit Carryforward [Axis]
Tax Credit Carryforward [Axis]
Return on borrowed funds
Return on borrowed funds [Member]
Return on borrowed funds
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Table]
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Table]
Entity Central Index Key
Entity Central Index Key
Accumulated depreciation and amortization
Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization
Amortization of regulatory assets
Amortization of Regulatory Asset
Schedule of Guarantor Obligations [Table]
Guarantor Obligation [Table]
Equity [Abstract]
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]
State and Local Jurisdictions
State and Local Jurisdictions [Table Text Block]
State and Local Jurisdictions
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount
electric energy and natural gas costs
Electric Energy and Natural Gas Costs [Member]
Electric Energy and Natural Gas Costs
OCI before reclassifications
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax
Receivable from PHI intercompany money pool
Other Receivables, Related Party
Other Receivables, Related Party
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV [Axis]
Expected return on assets
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-Term Rate of Return on Plan Assets
Designated as Hedging Instrument [Member]
Designated as Hedging Instrument [Member]
Merger related obligation
Broker-Dealer, Payable to Customer
Convertible Senior Notes Due Mar2029
Convertible Senior Notes Due Mar2029 [Member]
Convertible Senior Notes Due Mar2029
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]
Schedule of Income Taxes Allocated to Other Comprehensive Income (Loss) Components
Schedule Of Other Comprehensive Income Loss Tax [Table Text Block]
Schedule Of Other Comprehensive Income Loss Tax
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Included In Regulatory assets
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Included In Regulatory assets
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Included In Regulatory assets
Debt instrument, interest rate terms
Debt Instrument, Basis Spread on Variable Rate
Changes in Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income Loss [Text Block]
Accumulated Other Comprehensive Loss, net
Total
AOCI Attributable to Parent [Member]
Customer deposits
Contract with Customer, Refund Liability, Current
All Individuals
All Individuals [Member]
Delmarva Power and Light Company
Delmarva Power and Light Company [Member]
Delmarva Power and Light Company [Member]
Jurisdiction [Axis]
Statutory Accounting Practice, Jurisdiction [Axis]
Regulatory Liability [Domain]
Regulatory Liability [Domain]
Statement [Line Items]
Statement [Line Items]
BSC and PHISCO Service Companies
Related Party Transactions - BSC and PHISCO Service Companies [Table Text Block]
Related Party Transactions - BSC and PHISCO Service Companies (Details) [Table Text Block]
Total assets
Total assets
Assets
Schedule of Defined Benefit Plans Disclosures [Table]
Defined Benefit Plan [Table]
Deferred credits and other liabilities
Other Liabilities, Noncurrent [Abstract]
Increase in PP&E related to ARO update
(Decrease) Increase in PP&E Related to ARO Update
(Decrease) Increase in PP&E Related to ARO Update
Actuarial losses reclassified to periodic benefit cost
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, after Tax
Convertible Debt
Convertible Debt [Member]
Pennsylvania 2024 Gas Distribution Base Rate Case
Pennsylvania 2024 Gas Distribution Base Rate Case [Member]
Pennsylvania 2024 Gas Distribution Base Rate Case
Fixed Income Investments [Member]
Fixed Income Investments [Member]
Operating Segment
Operating Segments [Member]
Constellation Energy Corp
Constellation Energy Corp [Member]
Constellation Energy Corp
PEO
PEO [Member]
Public Utilities Transmission Rate Filings [Table Text Block]
Public Utilities Transmission Rate Filings [Table Text Block]
Public Utilities Transmission Rate Filings [Table Text Block]
Line of credit facility, maximum amount outstanding during period
Line of Credit Facility, Maximum Amount Outstanding During Period
Estimated Percent of Gas Purchases Being Hedged
Estimated Percent of Gas Purchases Being Hedged
The expected/target percentage of future gas purchases being hedged at a gas distribution company. The percentage is calculated as the amount of hedging products divided by the planned natural gas purchases in support of projected firm sales.
Financing trust guarantees
Guarantee of Indebtedness of Others [Member]
Other
Other Liabilities, Noncurrent
Goodwill
Goodwill
Retirement Plan Type [Axis]
Retirement Plan Type [Axis]
Forgone Recovery due to Violation of Home Country Law, Amount
Forgone Recovery due to Violation of Home Country Law, Amount
FMB495DueMar2036
FMB495DueMar2036 [Member]
FMB495DueMar2036
Retained Earnings
Undistributed (Losses)/Gains
Retained Earnings [Member]
Revolving Credit Facility
Revolving Credit Facility [Member]
Actuarial losses
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]
ComEd 2024 Energy Efficiency Formula Rate
ComEd 2024 Energy Efficiency Formula Rate [Member]
ComEd 2024 Energy Efficiency Formula Rate
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common stock, shares outstanding (in shares)
Common Stock, Shares, Outstanding
Award Timing Disclosures [Line Items]
Supplemental Cash Flow Information [Line Items]
Supplemental Cash Flow Information [Line Items]
Supplemental Cash Flow Information [Line Items]
Fair Value of Financial Liabilities Recorded at Amortized Cost
Fair Value, by Balance Sheet Grouping [Table Text Block]
Earnings Per Share, Diluted
Earnings Per Share, Diluted
Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Collaborative Arrangement, Transaction with Party to Collaborative Arrangement [Member]
Capitalized Ratemaking Amounts Not Recognized [Table Text Block]
Public Utilities General Disclosures [Table Text Block]
Intersubsegment Eliminations
Intersubsegment Eliminations [Member]
Amortization of intangible assets, net
Intangible Asset, Finite-Lived, Amortization Expense
First Mortgage Bonds
First Mortgage Bonds [Member]
Bonds that are backed by the first claim on the proceeds from the sale of a specific asset or set of assets in the event that the company is liquidated.
Maximum increase of revenue requirement
Maximum increase of revenue requirement
Maximum increase of revenue requirement
Shared service and other revenues
Service, Other [Member]
Defined Benefit Plan Amounts Recognized In Regulatory Assets Before Tax
Defined Benefit Plan Amounts Recognized In Regulatory Assets Before Tax
The aggregate net gain or loss and net prior service cost or credit recognized in regulatory assets, including amounts arising during the period and reclassification adjustments of regulatory assets as a result of being recognized as components of net periodic benefit cost for the period.
Surety Bonds
Surety Bond [Member]
PECO Trust IV
PECO Trust Four Affiliate [Member]
PECO Trust IV Related Party Affiliate
Potomac Electric Power Company
Potomac Electric Power Company [Member]
Potomac Electric Power Company [Member]
Deferred income taxes and unamortized investment tax credits
Deferred Income Taxes and Other Tax Liabilities, Noncurrent
Equity Awards Adjustments, Footnote
Equity Awards Adjustments, Footnote [Text Block]
Public Utilities Requested Rate Increase (Decrease), Prior Year Annual Reconciliation
Public Utilities Requested Rate Increase (Decrease), Prior Year Annual Reconciliation
Amount of public utility's requested rate increase (decrease) with regulatory agency, prior year annual reconciliation.
Sales
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales
Depreciation and amortization
Cost, Depreciation and Amortization
Purchased power and/or fuel
Cost, Direct Material
2023
2023 [Member]
Period increase or decrease goes into effect 2023
Materials and supplies
Inventory, Raw Materials and Supplies, Net of Reserves
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount
Lessor, Operating Lease, Term of Contract
Lessor, Operating Lease, Term of Contract
Other receivables
Other Receivables [Member]
Amount due from parties in nontrade transactions, classified as other.
Agreement Two
Agreement Two [Member]
Agreement Two
Incremental collateral for loss of investment grade credit rating
Incremental Collateral For Loss Of Investment Grade Credit Rating
Incremental collateral amount required to be provided related to its financial instruments, including derivatives, non-derivatives, normal purchase normal sales contracts and applicable payables and receivables, if the credit rating is downgraded below investment grade.
Other, Net [Abstract]
Other Nonoperating Income (Expense) [Abstract]
Public Utilities, Approved Debt Capital Structure, Percentage
Public Utilities, Approved Debt Capital Structure, Percentage
Derivative, Gain (Loss) on Derivative, Net
Derivative, Gain (Loss) on Derivative, Net
Operating income
Operating income
Operating Income (Loss)
Revenue, remaining performance obligation, amount
Revenue, Remaining Performance Obligation, Amount
Total members' equity
Beginning balance
Ending balance
Members' Equity
Changes in PHI intercompany money pool
Intercompany Money Pool Investments (Borrowings) PHI
Intercompany Money Pool Investments (Borrowings) PHI
Related Party Transaction [Domain]
Related Party Transaction [Domain]
Work Stoppage
Work Stoppage [Member]
Work Stoppage
ShortTermDebt03142024
ShortTermDebt03142024 [Member]
ShortTermDebt03142024
Basis points for ComEd's Revenue Requirement
Basis points for ComEd's Revenue Requirement
Maximum basis points that can be added to the average rate on 30-year treasury notes, to determine the allowed ROE for ComEd's revenue requirement.
Rule 10b5-1 Arrangement Adopted
Rule 10b5-1 Arrangement Adopted [Flag]
Service cost
Defined Benefit Plan, Service Cost
Regulatory Matters Pending Rate Cases [Line Items]
Regulatory Matters Pending Rate Cases [Line Items]
Line Items for Regulatory Matters Pending Rate Cases [Table]
Fair Value, Assets, Liabilities and Stockholders' Equity Measured on Recurring Basis [Abstract]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Beginning Balance
Ending Balance
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value
Description of Business and Basis of Presentation (All Registrants)
Business Description and Basis of Presentation [Text Block]
Product and Service [Domain]
Product and Service [Domain]
Receivable related to Regulatory Agreement Units
Offsetting receivable
Nontrade Receivables, Noncurrent
Compensation Actually Paid vs. Other Measure
Compensation Actually Paid vs. Other Measure [Text Block]
Natural Gas, US Regulated
Rate-regulated natural gas revenues
Natural Gas, US Regulated [Member]
Termination Date
Trading Arrangement Termination Date
Other Commitments [Axis]
Other Commitments [Axis]
Taxes Other Than Income Taxes
Schedule Of Taxes Excluding Income And Excise Taxes [Table Text Block]
This element may be used to capture the table showing the different components of taxes excluding income and excise taxes.
U.S. Federal statutory rate
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Compensation Actually Paid vs. Total Shareholder Return
Compensation Actually Paid vs. Total Shareholder Return [Text Block]
Other
Other
Other Liabilities, Current
Other current assets
Derivative Asset, Current
Contributions from parent
Contributions from parent
Equity Contributions From Parent
Equity Contributions From Parent
Accrued expenses
Accrued Liabilities, Current
Fair Value as of Grant Date
Award Grant Date Fair Value
Operating Activities [Axis]
Operating Activities [Axis]
Gain (Loss) on Disposition of Assets
Gain (Loss) on Disposition of Assets
Share Price
Forward Contract Indexed to Issuer's Equity, Forward Rate Per Share
Pay vs Performance Disclosure, Table
Pay vs Performance [Table Text Block]
Arrangement Duration
Trading Arrangement Duration
Consolidation Items [Axis]
Consolidation Items [Axis]
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
Entity Registrant Name
Entity Registrant Name
Insider Trading Policies and Procedures Not Adopted
Insider Trading Policies and Procedures Not Adopted [Text Block]
Interest expense to affiliates, net
Interest expense to affiliates, net
Interest Expense, Other
Total operating revenues
Total operating revenues
Total operating revenues
Revenues
Total deferred debits and other assets
Total deferred debits and other assets
Deferred Costs and Other Assets
Accounts payable and accrued expenses
Accounts payable and accrued expenses
Increase (Decrease) in Accounts Payable and Accrued Liabilities
Forgone Recovery due to Expense of Enforcement, Amount
Forgone Recovery due to Expense of Enforcement, Amount
Delaware 2022 Electric Distribution Base Rate Case
Delaware 2022 Electric Distribution Base Rate Case [Member]
Delaware 2022 Electric Distribution Base Rate Case
Effective Income Tax Rate Reconciliation, Amortization Of Excess Deferred Taxes, Percent
Effective Income Tax Rate Reconciliation, Amortization Of Excess Deferred Taxes, Percent
Effective Income Tax Rate Reconciliation, Amortization Of Excess Deferred Taxes, Percent
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
All Award Types
Award Type [Domain]
Derivatives Designated as Hedging Instruments Liabilities
Derivatives Designated as Hedging Instruments Liabilities [Member]
Derivatives Designated as Hedging Instruments Liabilities
Fair Value of Financial Assets and Liabilities (All Registrants)
Fair Value Disclosures [Text Block]
Fair Value, Inputs, Level 3 [Member]
Fair Value, Inputs, Level 3 [Member]
2021
2021 [Member]
Period increase or decrease goes into effect 2021
Defined Contribution Savings Plans
Defined Contribution Plan Disclosures [Table Text Block]
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger
Debt Instrument, Convertible, Threshold Percentage of Stock Price Trigger
Geographical [Axis]
Geographical [Axis]
Other Non-Cash Activity
Other Non-Cash Activity [Member]
Other Non-Cash Activity
Fair Value Measured at Net Asset Value Per Share [Member]
Fair Value Measured at Net Asset Value Per Share [Member]
Short-Term Debt [Table]
Short-Term Debt [Table]
Legal Entity [Axis]
Legal Entity [Axis]
Mutual Funds [Member]
Mutual Fund [Member]
Liability Class [Axis]
Liability Class [Axis]
Business Services Company
Business Services Company [Member]
Business Services Company [Member]
Distribution Base Rate Case Proceedings [Table]
Distribution Base Rate Case Proceedings [Table]
Distribution Base Rate Case Proceedings [Table]
Cash, restricted cash, and cash equivalents at beginning of period
Cash, restricted cash, and cash equivalents at end of period
Total cash, restricted cash, and cash equivalents
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Non-NEOs
Non-NEOs [Member]
Tax Matters Agreement [Domain]
Tax Matters Agreement [Domain]
Tax Matters Agreement [Domain]
Regulated and Unregulated Operation [Domain]
Regulated and Unregulated Operation [Domain]
Derivative Liability, Fair Value, Amount Not Offset Against Collateral
Derivative Liability, Subject to Master Netting Arrangement, before Offset of Collateral
Customer [Domain]
Customer [Domain]
Long-term Debt, Type [Domain]
Long-Term Debt, Type [Domain]
Beginning Balance - Contract Liabilities
Ending Balance - Contract Liabilities
Contract with Customer, Liability, Current
Illinois 2024 MRP Reconciliation Rate Case
Illinois 2024 MRP Reconciliation Rate Case [Member]
Illinois 2024 MRP Reconciliation Rate Case
Statistical Measurement [Axis]
Statistical Measurement [Axis]
Award Type
Award Type [Axis]
Interest Rate Contract
Interest Rate Contract [Member]
Named Executive Officers, Footnote
Named Executive Officers, Footnote [Text Block]
Retained earnings
Retained Earnings (Accumulated Deficit)
Product and Service [Axis]
Product and Service [Axis]
Debt Instrument, Convertible, Threshold Trading Days
Debt Instrument, Convertible, Threshold Trading Days
Awards Close in Time to MNPI Disclosures
Awards Close in Time to MNPI Disclosures [Table]
Short-term Debt [Line Items]
Short-Term Debt [Line Items]
Pension Plan, Defined Benefit [Member]
Pension Plan [Member]
Common Stock
Common Stock [Member]
DISTRICT OF COLUMBIA
DISTRICT OF COLUMBIA
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent
Period [Domain]
Period [Domain]
[Domain] for Period [Axis]
Amount of Impairment to Carrying Amount of Regulatory Assets
Amount of Impairment to Carrying Amount of Regulatory Assets
Changes in Accumulated Other Comprehensive Income [Abstract]
Changes in Accumulated Other Comprehensive Income [Abstract]
Changes in Accumulated Other Comprehensive Income [Abstract]
Interest rate and foreign currency derivative assets [Member]
Interest Rate and Foreign Currency Derivative Assets [Member]
Interest Rate and Foreign Currency Derivative Assets [Member]
Derivative, Name [Domain]
Derivative Contract [Domain]
Public Utilities General Disclosures [Table]
Public Utilities General Disclosures [Table]
ShortTermDebtAmend7 Mar142024
ShortTermDebt7Amend03142024 [Member]
ShortTermDebt7Amend03142024
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Total liabilities and shareholders’ equity
Total liabilities and shareholders’ equity
Liabilities and Equity
Realized Investment Gains (Losses)
Realized Investment Gains (Losses)
Employee Stock Option
Share-Based Payment Arrangement, Option [Member]
Purchases
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases
Capitalization, Equity [Table]
Capitalization, Equity [Table]
Segments [Axis]
Segments [Axis]
Additional 402(v) Disclosure
Additional 402(v) Disclosure [Text Block]
Asset Class [Axis]
Asset Class [Axis]
Receivables from and payables to affiliates, net
Increase (Decrease) in Receivables From Payables To Affiliates, Net
The net change in related receivables and payables from entities that are affiliated with the reporting entity by means of direct or indirect ownership. A positive value indicates a decrease in the net receivable or an increase in the net payable, while a negative value indicates an increase in the net receivable or a decrease in the net payable.
Related Party [Domain]
Related and Nonrelated Parties [Domain]
No Trading Symbol Flag
No Trading Symbol Flag
Tabular List, Table
Tabular List [Table Text Block]
Restricted cash included in other long-term assets
Restricted Cash and Cash Equivalent, Noncurrent
Other paid-in capital
Additional Paid in Capital
Notes Payable to Banks
Notes Payable to Banks [Member]
Accretion expense
Asset Retirement Obligation, Accretion Expense
Income Taxes Receivable, Current
Income Taxes Receivable, Current
Name
Awards Close in Time to MNPI Disclosures, Individual Name
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]
Operating and maintenance
Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses
New Jersey 2024 Electric Distribution Base Rate Case
New Jersey 2024 Electric Distribution Base Rate Case [Member]
New Jersey 2024 Electric Distribution Base Rate Case
Fair Value by Liability Class [Domain]
Fair Value by Liability Class [Domain]
DELAWARE
DELAWARE
Adjustment to Compensation:
Adjustment to Compensation [Axis]
Other accounts receivable
Other Receivables, Gross, Current
Amounts reclassified from AOCI
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax
Allocated Portion of Pension and Postretirement Benefit Costs
Schedule of Costs of Retirement Plans [Table Text Block]
Rule 10b5-1 Arrangement Terminated
Rule 10b5-1 Arrangement Terminated [Flag]
Aggregate Erroneous Compensation Amount
Aggregate Erroneous Compensation Amount
Prepaid utility taxes
Prepaid Taxes
Hedging Designation [Axis]
Hedging Designation [Axis]
Customer accounts receivable
Trade Accounts Receivable [Member]
Related party transaction capitalized costs support services
Related Party Transaction Capitalized Costs Support Services
Capitalized costs incurred for support services.
Credit Facility [Axis]
Credit Facility [Axis]
Assets, Fair Value Disclosure
Assets, Fair Value Disclosure
Maryland 2023 Gas Distribution Base Rate Case
Maryland 2023 Gas Distribution Base Rate Case [Member]
Maryland 2023 Gas Distribution Base Rate Case
Economic Hedges
Economic Hedges [Member]
Economic Hedges
Name
Measure Name
Illinois 2025 MRP Reconciliation Rate Case
Illinois 2025 MRP Reconciliation Rate Case [Member]
Illinois 2025 MRP Reconciliation Rate Case
Pay vs Performance Disclosure [Line Items]
Fair Value Inputs Forward Power Price
Fair Value Inputs Forward Power Price
Fair Value Inputs Forward Power Price
Fair Value Hierarchy and NAV [Domain]
Fair Value Hierarchy and NAV [Domain]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease)
Delaware 2025 Electric Distribution Base Rate Case
Delaware 2025 Electric Distribution Base Rate Case [Member]
Delaware 2025 Electric Distribution Base Rate Case
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Tax Matters Agreement [Axis]
Tax Matters Agreement [Axis]
Tax Matters Agreement
Other Paid-In Capital
Other Additional Capital [Member]
Corporate and Other
Corporate Segment and Other Operating Segment [Member]
Name
Trading Arrangement, Individual Name
Cash and cash equivalents
Cash and cash equivalents
Cash and Cash Equivalent
Regulatory Matters Assets and Liabilities [Line Items]
Regulatory Matters Assets and Liabilities [Line Items]
Regulatory Matters Assets and Liabilities [Line Items]
Illinois 2023 Electric Distribution Base Rate Case
Illinois 2023 Electric Distribution Base Rate Case [Member]
Illinois 2023 Electric Distribution Base Rate Case
Company Selected Measure Amount
Company Selected Measure Amount
Tax Period [Domain]
Tax Period [Domain]
Depreciation and amortization
Depreciation, Depletion and Amortization
Regulatory Matters Additional Narrative Information [Line Items]
Regulatory Matters Additional Narrative Information [Line Items]
Regulatory Matters Additional Narrative Information [Line Items]
Nuclear Production Tax Credits
Nuclear Production Tax Credits [Member]
Nuclear Production Tax Credits
Baltimore Gas and Electric Company
Baltimore Gas and Electric Company [Member]
Schedule of Accounts, Notes, Loans and Financing Receivable [Table]
Accounts and Financing Receivables [Table]
PECO Energy Co Affiliate
PECO Energy Co Affiliate [Member]
Peco Energy Co Related Party Affiliate
Non-PEO NEO
Non-PEO NEO [Member]
Increase (Decrease) in Regulatory Assets
Increase (Decrease) in Other Regulatory Assets
Award Timing Method
Award Timing Method [Text Block]
Supplemental Statement of Operations Information [Table]
Supplemental Statement of Operations Information [Table]
Schedule disclosing additional information about a registrants statement of operations.
Forecast [Member]
Forecast [Member]
Forgone Recovery, Explanation of Impracticability
Forgone Recovery, Explanation of Impracticability [Text Block]
Deferred Prosecution Agreement Liability, Current
Deferred Prosecution Agreement Liability, Current
Deferred Prosecution Agreement Liability, Current
Membership interest
Members' Capital
Actuarial loss
Defined Benefit Plan, Amortization of Gain (Loss)
Effective Income Tax Rate Reconciliation, Plant Flow Through, Percent
Effective Income Tax Rate Reconciliation, Plant Flow Through, Percent
Effective Income Tax Rate Reconciliation, Plant Flow Through, Percent
Long-term Debt, Type [Axis]
Long-Term Debt, Type [Axis]
Erroneous Compensation Analysis
Erroneous Compensation Analysis [Text Block]
Balance Sheet Location [Axis]
Location, Statement of Financial Position, Balance [Axis]
Environmental Remediation Site [Domain]
Environmental Remediation Site [Domain]
Public Utilities, Approved Return on Equity, Percentage
Public Utilities, Approved Return on Equity, Percentage
Restatement Determination Date:
Restatement Determination Date [Axis]
Schedule of Changes in Accumulated Other Comprehensive Income (Loss)
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
Remaining commitment
Remaining Commitment [Member]
Remaining Commitment [Member]
ComEd 2025 Energy Efficiency Formula Rate
ComEd 2025 Energy Efficiency Formula Rate [Member]
ComEd 2025 Energy Efficiency Formula Rate
Deferred Prosecution Agreement Payments
Litigation Settlement, Amount Awarded to Other Party
Decrease in capital expenditures not paid
Decrease in capital expenditures not paid
Change in Capital Expenditures Incurred But Not Yet Paid
The non cash impact of change in capital expenditures incurred but not yet paid.
Accounts receivable
Increase (Decrease) in Receivables
Debt Instrument, Convertible, Threshold Consecutive Trading Days
Debt Instrument, Convertible, Threshold Consecutive Trading Days
Fossil fuel
Energy Related Inventory, Natural Gas in Storage
Operating revenues
Revenues [Abstract]
Atlantic City Electric Company
Atlantic City Electric Company [Member]
Atlantic City Electric Company [Member]
Pension Benefits Adjustments, Footnote
Pension Benefits Adjustments, Footnote [Text Block]
Average shares of common stock outstanding:
Weighted Average Number of Shares Outstanding, Diluted [Abstract]
Statistical Measurement [Domain]
Statistical Measurement [Domain]
Forward Contract Indexed to Issuer's Equity, Type [Axis]
Forward Contract Indexed to Issuer's Equity, Type [Axis]
Document Fiscal Year Focus
Document Fiscal Year Focus
Pepco Holdings LLC Affiliate
Pepco Holdings LLC Affiliate [Member]
Pepco Holdings LLC Affiliate [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period
Customer [Axis]
Customer [Axis]
Common stock
Common Stock, Value, Issued
Depreciation, amortization, and accretion
Depreciation, amortization, and accretion
Depreciation, Amortization and Accretion, Net
Potomac Electric Power Co Affiliate
Potomac Electric Power Co Affiliate [Member]
Potomac Electric Power Co Affiliate [Member]
Public Utilities, General Disclosures [Line Items]
Public Utilities, General Disclosures [Line Items]
Schedule of Long-term Debt Instruments
Schedule of Long-Term Debt Instruments [Table Text Block]
Regulated Operation
Regulated Operation [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]
Prepaid renewable energy credits
Other Prepaid Expense, Current
Restatement Determination Date
Restatement Determination Date
Expected return on assets
Defined Benefit Plan, Expected Return (Loss) on Plan Assets
Regulatory Matters Completed Rate Cases [Table]
Regulatory Matters Completed Rate Cases [Table]
Regulatory Matters Completed Rate Cases [Table]
Schedule of Effective Income Tax Rate Reconciliation
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Beginning balance
Ending balance
Accounts Receivable, Allowance for Credit Loss
Regulatory liabilities
Regulatory Liability, Noncurrent
PHI Service Co Affiliate
PHI Service Co Affiliate [Member]
PHI Service Co Affiliate [Member]
Amendment Flag
Amendment Flag
Current liabilities
Liabilities, Current [Abstract]
Convertible debt converted (in shares)
Conversion of Stock, Shares Converted
Current period provision for expected credit losses
Allowance for credit losses
Accounts Receivable, Credit Loss Expense (Reversal)
Schedule of Notional Amounts of Outstanding Derivative Positions
Schedule of Notional Amounts of Outstanding Derivative Positions [Table Text Block]
2022
2022 [Member]
Period increase or decrease goes into effect 2022
Supplemental Cash Flow Information [Table]
Supplemental Cash Flow Information [Table]
Schedule disclosing additional information about a registrants statement of cash flows
Loss on sale of assets
Loss on sale of assets
Gain (Loss) on Disposition of Other Assets
Members' Equity [Abstract]
Members' Equity [Abstract]
Adjustment to Non-PEO NEO Compensation Footnote
Adjustment to Non-PEO NEO Compensation Footnote [Text Block]
Transfers into Level 3
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Transfers Into Level 3
Maryland 2023 Electric Distribution Base Rate Case
Maryland 2023 Electric Distribution Base Rate Case [Member]
Maryland 2023 Electric Distribution Base Rate Case
Entity Address, State or Province
Entity Address, State or Province
Economic Hedging Instrument Liabilites [Member]
Economic Hedging Instrument Liabilites [Member]
Economic Hedging Instrument Liabilites [Member]
Regulatory Matters (All Registrants)
Public Utilities Disclosure [Text Block]
PEO Total Compensation Amount
PEO Total Compensation Amount
Capital expenditures
Segment Reporting, Long-Lived Asset, Expenditure for Addition
Derivative, Notional Amount
Derivative, Notional Amount
Income Tax Contingency [Line Items]
Income Tax Contingency [Line Items]
Basic average shares of common stock outstanding (in shares)
Weighted Average Number of Shares Outstanding, Basic
Purchased power from affiliate
Related Party Transaction, Purchases from Related Party
Fair Value, by Balance Sheet Grouping [Table]
Fair Value, by Balance Sheet Grouping [Table]
Regulatory assets
Regulatory Asset, Noncurrent
Regulatory Liability [Axis]
Regulatory Liability [Axis]
Environmental Remediation Contingency [Domain]
Environmental Remediation Contingency [Domain]
Operating revenues
Electric and natural gas operating revenues
Revenue from Contract with Customer, Including Assessed Tax
Rabbi Trust Investments [Member]
Rabbi Trust Investments [Member]
This element represents the assets measured at fair value on a recurring basis related to rabbi trust investments.
Schedule of Cash Flow, Supplemental Disclosures
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
Amortization of operating ROU asset
Depreciation, Lessor Asset under Operating Lease
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan Disclosure [Line Items]
Accounts Receivable (All Registrants)
Loans, Notes, Trade and Other Receivables Disclosure [Text Block]
Commercial paper
Commercial Paper
Document Information [Line Items]
Document Information [Line Items]
Award Timing MNPI Disclosure
Award Timing MNPI Disclosure [Text Block]
Class of Stock [Axis]
Class of Stock [Axis]
6311 Life Insurance [Member]
6311 Life Insurance [Member]
Net income attributable to common shareholders
Net Income (Loss) Available to Common Stockholders, Basic
Increase (Decrease) in Obligation, Pension Benefits
Increase (Decrease) in Obligation, Pension Benefits
Receivables from affiliates
Accounts and Other Receivables, Net, Current
Indemnification for Taxes
Indemnification for Taxes [Member]
Indemnification for Taxes
Pension and non-pension postretirement benefit plans valuation adjustments
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), after Tax
Receivable [Domain]
Receivable [Domain]
Line of credit facility, maximum borrowing capacity
Line of Credit Facility, Maximum Borrowing Capacity
Collaborative Arrangement and Arrangement Other than Collaborative [Table]
Collaborative Arrangement and Arrangement Other than Collaborative [Table]
Maryland 2023 Electric Distribution Reconciliation Rate Case
Maryland 2023 Electric Distribution Reconciliation Rate Case [Member]
Maryland 2023 Electric Distribution Reconciliation Rate Case
ShortTermDebt4Amend03252026
ShortTermDebt350Term03252026 [Member]
ShortTermDebt350Term03252026
Treasury stock, at cost
Treasury Stock, Value
New Accounting Standards (All Registrants)
New Accounting Pronouncements, Policy [Policy Text Block]
Long-term Purchase Commitment, Minimum Energy Volume Required
Long-Term Purchase Commitment, Minimum Energy Volume Required
Change in Contract with Customer, Asset and Liability [Table]
Change in Contract with Customer, Asset and Liability [Table]
Change in Contract with Customer, Asset and Liability [Table]
Other Regulated Revenue
Other Regulated Revenue [Member]
Other Regulated Revenue [Member]
Loss on sales of assets
Gain (Loss) on Disposition of Property Plant Equipment
Loss on sales of assets
Gain (Loss) on Disposition of Property Plant Equipment
Other Legal Entities
Other Legal Entities [Member]
Other Legal Entities [Member]
Income taxes
Increase (Decrease) in Income Taxes Payable
Notes495DueMar2036
Notes495DueMar2036 [Member]
Notes495DueMar2036
Changes in assets and liabilities:
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract]
2025 Transmission Formula Rate Annual Update
2024 Transmission Formula Rate Annual Update [Member]
2024 Transmission Formula Rate Annual Update
Net cash flows used in investing activities
Cash Provided by (Used in) Investing Activity, Including Discontinued Operation
Equity Awards Adjustments, Excluding Value Reported in Compensation Table
Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member]
Unrecognized tax benefits
Unrecognized Tax Benefits
Commonwealth Edison Co Affiliate
Commonwealth Edison Co Affiliate [Member]
Commonwealth Edison Co Affiliate.
Income Tax Narrative Information [Line Items]
Income Tax Additional Narrative Information [Line Items]
Income Tax Additional Disclosure [Line Items]
Regulatory Assets
Regulatory Asset
Shareholders' Equity (Exelon)
Equity [Text Block]
Operating expenses
Costs and Expenses [Abstract]
Security Exchange Name
Security Exchange Name
FMB574DueMar2056
FMB574DueMar2056 [Member]
FMB574DueMar2056
Valuation Approach and Technique [Axis]
Valuation Approach and Technique [Axis]
Unamortized energy contract liabilities
Energy Marketing Contract Liabilities, Current
Consolidated Balance Sheet
Condensed Balance Sheet [Table Text Block]
Officers or Directors [Member]
Officers or Directors
Interest accrued
Interest Payable, Current
Name
Outstanding Recovery, Individual Name
Award Timing, How MNPI Considered
Award Timing, How MNPI Considered [Text Block]
Accrual for Environmental Loss Contingencies, Period Increase (Decrease)
Accrual for Environmental Loss Contingencies, Period Increase (Decrease)
Interest expense, net
Interest Expense,
Interest Expense, Borrowings
Public Utilities Approved Rate Increase (Decrease), Prior Year Annual Reconciliation
Public Utilities Approved Rate Increase (Decrease), Prior Year Annual Reconciliation
Amount of public utility's requested rate increase (decrease) with regulatory agency, prior year annual reconciliation.
Geographical [Domain]
Geographical [Domain]
Related party transaction, due from (to) related party, current
Due from (to) Related Party, Current
Due from (to) Related Party, Current
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]
Fair Value Reconciliation of Level 3 Assets and Liabilities Measured at Fair Value on a Recurring Basis, Valuation Technique
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis, Valuation Techniques [Table Text Block]
Pension Adjustments Prior Service Cost
Pension Adjustments Prior Service Cost [Member]
Accrual for Environmental Loss Contingencies, Component Amount
Accrual for Environmental Loss Contingencies, Component Amount
Schedule of Capitalization, Equity [Line Items]
Schedule of Capitalization, Equity [Line Items]
Approved Revenue Requirement Increase (Decrease)
Public Utilities, Approved Rate Increase (Decrease), Amount
Pension and Other Postretirement Benefits Costs
Pension and non-pension postretirement benefit costs
Pension and Other Postretirement Benefits Cost (Reversal of Cost)
Reclassification, Type [Axis]
Reclassification, Type [Axis]
Net fair value changes related to derivatives
Unrealized Gain (Loss) on Derivatives
Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Percent
Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Percent
Over-recovered credit loss expense
Over-recovered credit loss expense [Member]
Over-recovered credit loss expense
Pension and Non-Pension Postretirement Benefit Plan Items
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]
Asset Class [Domain]
Asset Class [Domain]
Related Party Transactions [Abstract]
Related Party Transactions [Abstract]
Error Correction, Type [Axis]
Error Correction, Type [Axis]
Beginning balance (in shares)
Ending balance (in shares)
Shares, Issued
Compensation Amount
Outstanding Recovery Compensation Amount
General Business Tax Credit Carryforward
General Business Tax Credit Carryforward [Member]
Individual:
Individual [Axis]
Diluted average shares of common stock outstanding (in shares)
Weighted Average Number of Shares Outstanding, Diluted
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Entity Emerging Growth Company
Entity Emerging Growth Company
Related Party Transaction [Line Items]
Related Party Transaction [Line Items]
Deferred Income Tax Charge
Deferred Income Tax Charge [Member]
Underlying Security Market Price Change
Underlying Security Market Price Change, Percent
Change in environmental liabilities
Environmental Expense and Liabilities
Commercial Paper
Commercial Paper [Member]
Derivative Financial Instruments (All Registrants)
Derivative Instruments and Hedging Activities Disclosure [Text Block]
Change in Contract with Customer, Asset and Liability [Line Items]
Change in Contract with Customer, Asset and Liability [Line Items]
Change in Contract with Customer, Asset and Liability [Line Items]
Regulatory Asset [Axis]
Regulatory Asset [Axis]
Period [Axis]
Period [Axis]
Period [Axis]
Short-term borrowings
Short-Term Debt
Agreement Four
Agreement Four [Member]
Agreement Four
Savings Plan Employer Contributions
Defined Benefit Plan, Plan Assets, Contributions by Employer
Statutory Accounting Practices, Jurisdiction [Domain]
Statutory Accounting Practice, Jurisdiction [Domain]
Revenue from Contract with Customer [Abstract]
Revenue from Contract with Customer [Abstract]
VIRGINIA
VIRGINIA
Derivative, cash received on hedge
Derivative, Cash Received on Hedge
Treasury Stock
Treasury Stock, Common [Member]
Residential
Residential [Member]
Residential [Member]
Commercial Commitments
Other Commitments [Table Text Block]
Pepco Holdings Inc [Member]
PEPCO Holdings Inc [Member]
PEPCO Holdings Inc [Member]
All Executive Categories
All Executive Categories [Member]
Valuation Approach and Technique [Domain]
Valuation Approach and Technique [Domain]
Payroll
Other Labor-related Expenses
Pension Adjustments Service Cost
Pension Adjustments Service Cost [Member]
Changes in Exelon intercompany money pool
Intercompany Money Pool Investments (Borrowings) Exelon
Intercompany Money Pool Investments (Borrowings) Exelon
Calculation of Net Periodic Benefit Costs
Schedule of Net Benefit Costs [Table Text Block]
Intercompany Money Pool Investments Contributions Exelon
Intercompany Money Pool Investments Contributions Exelon
Intercompany Money Pool Investments Contributions Exelon
Agreement Three
Agreement Three [Member]
Agreement Three
Collateral [Member]
Collateral [Member]
Collateral [Member]
PECO Trust III
PECO Trust Three Affiliate [Member]
PECO Trust III Related Party Affiliate
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation [Abstract]
Defined Benefit Plan Amounts Recognized In Regulatory Liabilities Before Tax
Defined Benefit Plan Amounts Recognized In Regulatory Liabilities Before Tax
Increase in regulatory liabilities due to updated valuation received by Exelon for its legacy pension and other postretirement benefit obligations.
Settlements
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Settlements
Debt Disclosure [Abstract]
Debt Disclosure [Abstract]
Segment Information (All Registrants)
Segment Reporting [Text Block]
Minimum [Member]
Minimum [Member]
Investments, Fair Value Disclosure
Investments, Fair Value Disclosure
Debt Instrument, Convertible Terms of Conversion [Axis]
Debt Instrument, Convertible Terms of Conversion [Axis]
Debt Instrument, Convertible Terms of Conversion
Non-Rule 10b5-1 Arrangement Adopted
Non-Rule 10b5-1 Arrangement Adopted [Flag]
Public Utilities, Regulatory Proceeding [Domain]
Public Utilities, Regulatory Proceeding [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]
Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Derivative [Member]
Derivative [Member]
Total liabilities
Financial Liabilities Fair Value Disclosure
Other Liabilities
Other Liabilities
Public Utilities, Requested Rate Increase (Decrease), Amount
Public Utilities, Requested Rate Increase (Decrease), Amount
Non-service net periodic benefit cost
Non-service net periodic benefit cost
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)
2025 Transmission Formula Rate Revenue Reduction
2024 Transmission Formula Rate Revenue Reduction [Member]
2024 Transmission Formula Rate Revenue Reduction
Common stock, shares authorized (in shares)
Common Stock, Shares Authorized
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Regulatory Matters Completed Rate Cases [Line Items]
Regulatory Matters Completed Rate Cases [Line Items]
[Line Items] for Regulatory Matters Completed Rate Cases [Table]
Baltimore City Conduit
Baltimore City Conduit [Member]
Baltimore City Conduit
Exercise Price
Award Exercise Price
Mark-to-Market Derivative Liabilities
Mark-to-Market Derivative Liabilities [Member]
Mark-to-Market Derivative Liabilities
Fair Value, Recurring [Member]
Fair Value, Recurring [Member]
Error Correction, Type [Domain]
Error Correction, Type [Domain]
Segment Reporting [Line Items]
Segment Reporting [Line Items]
InterestRateSwapNotionalTerminated
InterestRateSwapTerminated [Member]
InterestRateSwapTerminated
Document Quarterly Report
Document Quarterly Report
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]
Curtailment benefits
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment
Retirement of long-term debt
Repayments of Long-Term Debt
Repayments of Long-Term Debt
Operating Activities [Domain]
Operating Activities [Domain]
FMB500DueMar2036
FMB500DueMar2036 [Member]
FMB500DueMar2036
Other Commitment, to be Paid, Year Three
Other Commitment, to be Paid, Year Three
Awards Close in Time to MNPI Disclosures, Table
Awards Close in Time to MNPI Disclosures [Table Text Block]
Equity Component [Domain]
Equity Component [Domain]
Public Utilities, Requested Rate Increase (Decrease) Annual Reconciliation
Public Utilities, Requested Rate Increase (Decrease) Annual Reconciliation
Amount of public utility's requested rate increase (decrease) with regulatory agency, annual reconciliation.
Included in net income
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings
Payments for Environmental Liabilities
Payments for Environmental Liabilities
Property
Real Estate Tax Expense
Energy-related options
Energy Related Options
Represents the reclassification of energy-related option premiums to realized at settlement of contracts recorded in results of operations due to the settlement of the underlying transaction.
Customer accounts receivable
Accounts Receivable, before Allowance for Credit Loss, Current
Adoption Date
Trading Arrangement Adoption Date
Operating revenues from affiliates
Revenues from Related Parties
Revenues from Related Parties
Counterparty Name [Domain]
Counterparty Name [Domain]
Total other income and (deductions)
Nonoperating Income (Expense)
Nature of Uncertainty [Axis]
Nature of Uncertainty [Axis]
Title
Trading Arrangement, Individual Title
Forgone Recovery due to Disqualification of Tax Benefits, Amount
Forgone Recovery due to Disqualification of Tax Benefits, Amount
FMB578DueSep2055
FMB578DueSep2055 [Member]
FMB578DueSep2055
Accounting Policies [Abstract]
Accounting Policies [Abstract]
Restatement does not require Recovery
Restatement Does Not Require Recovery [Text Block]
Environmental Remediation Site [Axis]
Environmental Remediation Site [Axis]
Forward Contract Indexed to Issuer's Equity, Type [Domain]
Forward Contract Indexed to Issuer's Equity, Type [Domain]
Other financing activities
Proceeds from (Payment for) Other Financing Activity
Insider Trading Policies and Procedures Adopted
Insider Trading Policies and Procedures Adopted [Flag]
Income Tax Narrative Information [Table]
Income Tax Additional Narrative Information [Table]
Income Tax Additional Disclosure [Table]
Schedule of Revolving Credit Agreements
Schedule of Line of Credit Facilities [Table Text Block]
Fair Value Assets Liabilities Measured On Recurring Basis [Table]
Fair Value Assets Liabilities Measured On Recurring Basis [Table]
Summarization of information required and determined to be disclosed concerning assets and liabilities, including [financial] instruments that are classified in stockholders' equity, which are measured at fair value on a recurring basis.
Footnotes To Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Abstract]
Footnotes To Fair Value Assets And Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Abstract]
Business Combination [Domain]
Business Combination [Domain]
Illinois Chamber of Commerce
Illinois Chamber of Commerce [Member]
Illinois Chamber of Commerce
DPL 2024 Natural Gas Distribution Base Rate Case
DPL DE 2024 Natural Gas Distribution Base Rate Case [Member]
DPL DE 2024 Natural Gas Distribution Base Rate Case
Letter of Credit
Letter of Credit [Member]
Customer Refund Liability, Current
Customer Refund Liability, Current
Commitments and Contingencies (All Registrants)
Commitments and Contingencies Disclosure [Text Block]
Compensation Actually Paid vs. Net Income
Compensation Actually Paid vs. Net Income [Text Block]
InterestRateSwapNotional10YR
InterestRateSwapNotional10YR [Member]
InterestRateSwapNotional10YR
FMB530DueMar2041
FMB530DueMar2041 [Member]
FMB530DueMar2041
Short-term bank loans and notes payable
Short-Term Bank Loans and Notes Payable
Notes payable, current
Notes Payable, Current
All Adjustments to Compensation
All Adjustments to Compensation [Member]
Corporate, Non-Segment
Corporate
Segment Reporting, Reconciling Item, Corporate Nonsegment [Member]
Business Combination [Axis]
Business Combination [Axis]
Proceeds from short-term borrowings with maturities greater than 90 days
Proceeds from Short-Term Debt, Maturing in More than Three Months
Net cash flows provided by operating activities
Cash Provided by (Used in) Operating Activity, Including Discontinued Operation
Shareholders’ equity
Equity, Attributable to Parent [Abstract]
Income Statement [Abstract]
Income Statement [Abstract]
2026
2026 [Member]
Period increase or decrease goes into effect 2026
Employee stock purchase plan activity (in shares)
Stock Issued During Period, Shares, Employee Stock Purchase Plans
Document Transition Report
Document Transition Report
Intersegment Eliminations
Intersegment Eliminations [Member]
Stock Appreciation Rights (SARs)
Stock Appreciation Rights (SARs) [Member]
Other Commitments [Domain]
Other Commitments [Domain]
City Area Code
City Area Code
Depreciation, Amortization and Accretion [Abstract]
Depreciation, Amortization and Accretion, Net [Abstract]
Document Information [Table]
Document Information [Table]
Basis points for Transmission Formula Rate
Basis points for Transmission Formula Rate
Basis points for Transmission Formula Rate
Long-term debt (including amounts due within one year)
Debt Instrument, Fair Value Disclosure
Pension obligations
Liability, Defined Benefit Pension Plan, Noncurrent
Name
Forgone Recovery, Individual Name
Non-GAAP Measure Description
Non-GAAP Measure Description [Text Block]
2027
2027 [Member]
Period increase or decrease goes into effect 2027
Entity [Domain]
Entity [Domain]
Pepco MD 2025 Electric Distribution Base Rate Case
Pepco MD 2025 Electric Distribution Base Rate Case [Member]
Pepco MD 2025 Electric Distribution Base Rate Case
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate [Line Items]
Effective Income Tax Rate Reconciliation [Line Items]
Prior service cost (credit)
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)
Fair Value, Net Asset (Liability)
Fair Value, Net Asset (Liability)
Employee stock purchase plan activity
Stock Issued During Period, Value, Employee Stock Purchase Plan
Issuance of Common Stock (in shares)
Stock Issued During Period, Shares, New Issues
Maryland 2022 Electric Distribution Base Rate Case
Maryland 2022 Electric Distribution Base Rate Case [Member]
Maryland 2022 Electric Distribution Base Rate Case
Operating and maintenance from affiliates
Related Party Transaction Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses
Related Party Transaction Utilities Operating Expense, Maintenance, Operations, and Other Costs and Expenses
Arithmetic Average [Member]
Arithmetic Average [Member]
Measurement Basis [Axis]
Measurement Basis [Axis]
Cash Equivalents [Member]
Cash Equivalents [Member]
Repayments on short-term borrowings with maturities greater than 90 days
Repayments of Short-Term Debt, Maturing in More than Three Months
Interest Rate Derivative Liabilities
Interest Rate Derivative Liabilities [Member]
Interest Rate Derivative Liabilities
Product Information [Line Items]
Product Information [Line Items]
Revenues recognized
Contract with Customer, Liability, Revenue Recognized
Taxes accrued
Taxes Payable, Current
Erroneously Awarded Compensation Recovery
Erroneously Awarded Compensation Recovery [Table]
Pennsylvania 2024 Electric Distribution Base Rate Case
Pennsylvania 2024 Electric Distribution Base Rate Case [Member]
Pennsylvania 2024 Electric Distribution Base Rate Case
Accumulated Other Comprehensive Income (Loss) [Table]
Accumulated Other Comprehensive Income (Loss) [Table]
Entity Current Reporting Status
Entity Current Reporting Status
Net cash flows provided by financing activities
Net cash flows provided by financing activities
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation
Total Shareholder Return Amount
Total Shareholder Return Amount
Cash Flow Hedging
Cash Flow Hedging [Member]
Contributions from member
Proceeds from Contributions from Affiliates
Deferred debits and other assets
Other Assets, Noncurrent [Abstract]
Changes in short-term borrowings
Proceeds from (Repayments of) Short-Term Debt, Maturing in Three Months or Less
Line of Credit Facility [Line Items]
Line of Credit Facility [Line Items]
PECO Energy Co 2026 Gas Distribution Rate Case
PECO Energy Co 2026 Gas Distribution Rate Case [Member]
PECO Energy Co 2026 Gas Distribution Rate Case
Baltimore Gas And Electric Company Affiliate
Baltimore Gas And Electric Company Affiliate [Member]
Baltimore Gas and Electric Related Party Affiliate
Allocation Of Federal Tax Benefit Under Tax Sharing Agreement
Allocation Of Federal Tax Benefit Under Tax Sharing Agreement
Allocation Of Federal Tax Benefit Under Tax Sharing Agreement
Cash collateral held with external counterparties
Cash collateral held with external counterparties [Table Text Block]
Cash collateral held with external counterparties
Utilities Operating Expense, Maintenance and Operations
Utilities Operating Expense, Maintenance and Operations
Compensation-related accruals
Accrued Compensation Current
Carrying value as of the balance sheet date of obligations incurred and payable for payroll, employee benefits, incentive compensation and vacation. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).
Adjustments to reconcile net income to net cash flows provided by operating activities:
Adjustments to reconcile net income to net cash flows provided by operating activities:
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract]
Calvin G. Butler, Jr. [Member]
Calvin G. Butler, Jr.
Writeoffs, net of recoveries
Accounts Receivable, Allowance for Credit Loss, Writeoff
Property, plant and equipment, net
Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization
Cash flows from financing activities
Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]
Other Commitment, to be Paid, Year Five and Beyond
Other Commitment, to be Paid, Year Five
Interest cost
Defined Benefit Plan, Interest Cost
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Accounts, Notes, Loans and Financing Receivable, Gross, Allowance, and Net [Abstract]
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Table Text Block]
Atlantic City Electric Co Affiliate
Atlantic City Electric Co Affiliate [Member]
Atlantic City Electric Co Affiliate [Member]
Total deferred credits and other liabilities
Total deferred credits and other liabilities
Deferred Credits and Other Liabilities
Proceeds from sales of assets
Proceeds from Sale, Property, Held-for-Sale
Total derivative assets
Derivative Asset
Other Income
Other Income
Underlying Securities
Award Underlying Securities Amount
Estimate of Fair Value Measurement [Member]
Estimate of Fair Value Measurement [Member]
Revenue from Contracts with Customers (All Registrants)
Revenue from Contract with Customer [Text Block]
Issuance of Common Stock
Stock Issued During Period, Value, New Issues
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Customer, Extent of Reliance [Line Items]
Other investing activities
Payment for (Proceeds from) Other Investing Activity
Inventories
Increase (Decrease) in Inventories
External Counterparties
External Counterparties [Member]
External Counterparties
Segment Reporting [Table]
Segment Reporting [Table]
Pension and other post retirement benefit [Member]
Pension and other post retirement benefit [Member]
Pension and other post retirement benefit [Member]
Schedule of Related Party Transactions, by Related Party [Table]
Related Party Transaction [Table]
Long Term Debt to Financing Trusts
Related Party Transactions - Long Term Debt to Financing Trusts [Table Text Block]
Related Party Transactions - Long Term Debt to Financing Trusts [Table Text Block]
Other
Other Assets, Current
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Abstract]
All Trading Arrangements
All Trading Arrangements [Member]
Other Performance Measure, Amount
Other Performance Measure, Amount
Award Timing MNPI Considered
Award Timing MNPI Considered [Flag]
Convertible Senior Notes [Line Items]
Convertible Senior Notes [Line Items]
Convertible Senior Notes [Line Items]
Electricity, US Regulated
Rate-regulated electric revenues
Electricity, US Regulated [Member]
Current Fiscal Year End Date
Current Fiscal Year End Date
Other Commitment, to be Paid, Remainder of Fiscal Year
Other Commitment, to be Paid, Remainder of Fiscal Year
Non-PEO NEO Average Total Compensation Amount
Non-PEO NEO Average Total Compensation Amount
Derivative [Line Items]
Derivative [Line Items]
Long-term incentive plan activity (in shares)
Shares Issued, Shares, Share-Based Payment Arrangement, before Forfeiture
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]
Common stock dividends (in dollars per share)
Common Stock, Dividends, Per Share, Declared
Entity File Number
Entity File Number
Guaranteed lease residual values
Guarantee Obligations [Member]
Recovery of Erroneously Awarded Compensation Disclosure [Line Items]
Measure:
Measure [Axis]
Treasury stock, common (in shares)
Treasury Stock, Common, Shares
Asset retirement obligations
Asset Retirement Obligations, Noncurrent
ShortTermDebtAmend2 Mar142024
ShortTermDebt2Amend03142024 [Member]
ShortTermDebt2Amend03142024
Equity Components [Axis]
Equity Components [Axis]
Related Party
Related Party [Member]
Regulatory assets and liabilities, net
Increase (Decrease) in Regulatory Assets and Liabilities
Under Recovered Energy and Natural Gas Costs
Under Recovered Energy and Natural Gas Costs [Member]
Under Recovered Energy and Natural Gas Costs
First Mortgage
First Mortgage [Member]
Tax Year 2023
Tax Year 2023 [Member]
Entity Interactive Data Current
Entity Interactive Data Current
Deferred Compensation Liability, Current and Noncurrent
Deferred Compensation Liability, Current and Noncurrent
Contributions from parent
Proceeds from Contributions from Parent
Settlement with Taxing Authority
Settlement with Taxing Authority [Member]
Entity Small Business
Entity Small Business
Movement in Accumulated Other Comprehensive Income [Roll Forward]
Movement in Accumulated Other Comprehensive Income [Roll Forward]
Movement in Accumulated Other Comprehensive Income [Roll Forward]
Comprehensive income
Comprehensive income
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate [Table]
Effective Income Tax Rate Reconciliation [Table]
MNPI Disclosure Timed for Compensation Value
MNPI Disclosure Timed for Compensation Value [Flag]
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount
Other
Other Assets, Noncurrent
Document Type
Document Type
Environmental Liability - Buzzard Point
Environmental Liability - Buzzard Point
Environmental Liability - Buzzard Point
Site Contingency [Line Items]
Site Contingency [Line Items]
Public Utilities Energy Efficiency Revenue [Table Text Block]
Public Utilities Energy Efficiency Revenue [Table Text Block]
Public Utilities Energy Efficiency Revenue
ComEd Financing III
ComEd Financing Three Affiliate [Member]
ComEd Financing III Related Party Affiliate
ShortTermDebt3Amend03252026
ShortTermDebt150Term03252026 [Member]
ShortTermDebt150Term03252026
Statement of Stockholders' Equity [Abstract]
Statement of Stockholders' Equity [Abstract]
Issuance of long-term debt
Proceeds from Issuance of Long-Term Debt
Local Phone Number
Local Phone Number
Other Postretirement Benefit Plan, Defined Benefit [Member]
Other Postretirement Benefits Plan [Member]
Supplemental Financial Information (All Registrants)
Additional Financial Information Disclosure [Text Block]
Public Utilities, Approved Equity Capital Structure, Percentage
Public Utilities, Approved Equity Capital Structure, Percentage
Letters of Credit
Financial Standby Letter of Credit [Member]
Commitments and contingencies
Commitments and Contingencies
PHI Service Company
PHI Service Company [Member]
PHI Service Company [Member]
Changed Peer Group, Footnote
Changed Peer Group, Footnote [Text Block]
Illinois 2024 Electric Distribution Reconciliation Rate Case
Illinois 2024 Electric Distribution Reconciliation Rate Case [Member]
Illinois 2024 Electric Distribution Reconciliation Rate Case
Income Tax Contingency [Table]
Income Tax Contingency [Table]
Executive Category:
Executive Category [Axis]
Receivable Type [Axis]
Receivable Type [Axis]
Other Comprehensive Income (Loss), Tax
Other Comprehensive Income (Loss), Tax
Debt Conversion Terms One
Debt Conversion Terms One [Member]
Debt Conversion Terms One
Counterparty Name [Axis]
Counterparty Name [Axis]
LIABILITIES AND SHAREHOLDERS’ EQUITY
Liabilities and Equity [Abstract]
Other Commitments [Table]
Other Commitments [Table]
Under/Over Recovered Transmission Costs
Under/Over Recovered Transmission Costs [Member]
Under/Over Recovered Transmission Costs
Inventories, net
Inventory, Net
Non-PEO NEO Average Compensation Actually Paid Amount
Non-PEO NEO Average Compensation Actually Paid Amount
Supplemental cash flow information
Supplemental Cash Flow Information [Abstract]
Accrual For MGP Investigation And Remediation
Accrual For MGP Investigation And Remediation [Member]
Represents the portion of the total environmental investigation and remediation reserve related to manufactured gas plant investigation and remediation.
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table]
PEO Name
PEO Name
Carbon Mitigation Credit rider
Carbon Mitigation Credit rider [Member]
Carbon Mitigation Credit rider
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Long-term debt to financing trusts
Long-term debt to Financing Trusts
Long-term debt to Financing Trusts
Regulatory Matters Pending Rate Cases [Table]
Regulatory Matters Pending Rate Cases [Table]
Regulatory Matters Pending Rate Cases [Table]
Stock Price or TSR Estimation Method
Stock Price or TSR Estimation Method [Text Block]
Entity Tax Identification Number
Entity Tax Identification Number
Derivative Instruments and Hedging Activities Disclosures [Table]
Derivative Instruments and Hedging Activities Disclosures [Table]
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Changes in PHI intercompany money pool
Intercompany Money Pool Investments Contributions PHI
Intercompany Money Pool Investments Contributions PHI
Unrealized (loss) on cash flow hedges
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax
Other Commitments [Line Items]
Other Commitments [Line Items]
Regulation Status [Axis]
Regulation Status [Axis]
Commitments And Contingencies Additional Narrative Information [Table]
Commitments And Contingencies Additional Narrative Information [Table]
Commitments And Contingencies Additional Narrative Information [Table]
Public Utilities, Requested Equity Capital Structure, Percentage
Public Utilities, Requested Equity Capital Structure, Percentage
Delmarva Power and Light Co Affiliate
Delmarva Power and Light Co Affiliate [Member]
Delmarva Power and Light Co Affiliate [Member]
Supplemental Statement of Operations Information [Line Items]
Supplemental Statement of Operations Information [Line Items]
Supplemental Statement of Operations Information Line Item
Tax Year 2024
Tax Year 2024 [Member]
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
Accounts Receivable, Purchase
Accounts Receivable, Purchase
Aggregate Erroneous Compensation Not Yet Determined
Aggregate Erroneous Compensation Not Yet Determined [Text Block]
Material Terms of Trading Arrangement
Material Terms of Trading Arrangement [Text Block]
Restricted cash and cash equivalents
Restricted cash
Restricted Cash and Cash Equivalent, Current
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]
Public Utilities, Property, Plant and Equipment, Amount of Disallowed Costs for Recently Completed Plant
Public Utilities, Property, Plant and Equipment, Amount of Disallowed Costs for Recently Completed Plant
Pepco Maryland 2023 Electric Distribution Base Rate Case
Pepco Maryland 2023 Electric Distribution Base Rate Case [Member]
Pepco Maryland 2023 Electric Distribution Base Rate Case
Comprehensive income
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest
Measurement Frequency [Domain]
Measurement Frequency [Domain]
Debt Instrument [Axis]
Debt Instrument [Axis]
Utility taxes
Utilities Operating Expense, Taxes
Settling Shareholders' Attorney Fees
Settling Shareholders' Attorney Fees
Settling Shareholders' Attorney Fees
Tax Period [Axis]
Tax Period [Axis]
Public Utilities, Regulatory Proceeding [Axis]
Public Utilities, Regulatory Proceeding [Axis]
Subsegments Consolidation Items [Domain]
Subsegments Consolidation Items [Domain]
Earnings Per Share, Basic
Earnings Per Share, Basic
Maryland 2023 Gas Distribution Reconciliation Rate Case
Maryland 2023 Gas Distribution Reconciliation Rate Case [Member]
Maryland 2023 Gas Distribution Reconciliation Rate Case
Tax credit carryforward, valuation allowance
Tax Credit Carryforward, Valuation Allowance
Total current assets
Total current assets
Assets, Current
Insider Trading Arrangements [Line Items]
Long-term debt
Long-Term Debt, Excluding Current Maturities
Amortization of:
Amortization of Prior Service Cost (Benefit) and Actuarial Loss [Abstract]
Amortization of Prior Service Cost (Benefit) and Actuarial Loss [Abstract]
Customer accounts receivable, net
Customer accounts receivable, net
Accounts Receivable, after Allowance for Credit Loss, Current
Commodity Contract [Member]
Commodity Contract [Member]
Schedule of Commercial Paper Borrowings
Schedule of Short-Term Debt [Table Text Block]
Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table
Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member]
Fair Value Measurement [Domain]
Fair Value Measurement [Domain]
Compensation Actually Paid vs. Company Selected Measure
Compensation Actually Paid vs. Company Selected Measure [Text Block]
Cover [Abstract]
Cover [Abstract]
Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Amount
Effective Income Tax Rate Reconciliation, Tax Credit, Investment, Amount
Fair Value Measurement Inputs and Valuation Techniques [Table]
Fair Value Measurement Inputs and Valuation Techniques [Table]
Illinois 2024 RBA Reconciliation
Illinois 2024 RBA Reconciliation [Member]
Illinois 2024 RBA Reconciliation
Short-term debt, weighted average interest rate, at point in time
Short-Term Debt, Weighted Average Interest Rate, at Point in Time
Equity Awards Adjustments
Equity Awards Adjustments [Member]
Hedging Relationship [Domain]
Hedging Relationship [Domain]
Mark-to-market derivative liabilities
Mark-to-market derivative liabilities (noncurrent liabilities)
Mark-to-market derivative liabilities (noncurrent liabilities)
Derivative Liability, Noncurrent
Regulatory Asset [Domain]
Regulatory Asset [Domain]
Accumulated Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Tax
Accumulated Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), after Tax
Supplemental Balance Sheet Information [Line Items]
Supplemental Balance Sheet Information [Line Items]
Supplemental Balance Sheet Information.
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unbilled customer revenue
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
Supplemental Balance Sheet Information [Table]
Supplemental Balance Sheet Information [Table]
Schedule disclosing additional information about a registrants assets and liabilities in their statement of financial position.
Agreement Five
Agreement Five [Member]
Agreement Five
Other, net
Other Nonoperating Income (Expense)
Income Taxes Receivable, Noncurrent
Income Taxes Receivable, Noncurrent
Total environmental investigation and remediation reserve
Accrual for Environmental Loss Contingencies, Gross
Debt Instrument, Convertible, Carrying Amount of Equity Component
Debt Instrument, Convertible, Carrying Amount of Equity Component
Other
Other [Member]
Other [Member]
Derivatives, Fair Value [Line Items]
Derivatives, Fair Value [Line Items]
Regulatory Liabilities
Regulatory Liability
Public Utilities Distribution Rate Cases, Pending
Public Utilities Distribution Rate Cases, Pending [Table Text Block]
Public Utilities Distribution Rate Cases, Pending
Environmental Remediation
Environmental Remediation [Member]
Hedging Designation [Domain]
Hedging Designation [Domain]
Class of Stock [Domain]
Class of Stock [Domain]
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability
Statement of Cash Flows [Abstract]
Statement of Cash Flows [Abstract]
Pension and non-pension postretirement benefit contributions
Payment for Pension and Other Postretirement Benefits
Payment for Pension and Other Postretirement Benefits
Other Commitment
Other Commitment
Aggregate Available
Trading Arrangement, Securities Aggregate Available Amount
Income Taxes (All Registrants)
Income Tax Disclosure [Text Block]
Accounts payable
Accounts payable
Accounts Payable, Current
Other non-cash operating activities
Other Noncash Income (Expense)
Deferred Storm Costs
Deferred Storm Costs [Member]
Deferred Storm Costs
Pepco Maryland 2023 Electric Distribution Reconciliation Rate Case
Pepco Maryland 2023 Electric Distribution Reconciliation Rate Case [Member]
Pepco Maryland 2023 Electric Distribution Reconciliation Rate Case
Pay vs Performance Disclosure
Pay vs Performance Disclosure [Table]
Retirement Plan Type [Domain]
Retirement Plan Type [Domain]
Entity Filer Category
Entity Filer Category
Public Utilities Distribution Rate Cases [Table Text Block]
Public Utilities Distribution Rate Cases [Table Text Block]
Public Utilities Distribution Rate Cases [Table Text Block]
Discount rate
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate
Stock Issued During Period, Shares, New Issues
Forward Contract Indexed to Issuer's Equity, Indexed Shares
Other Commitment, to be Paid, Year One
Other Commitment, to be Paid, Year One
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)
Effective Income Tax Rate Reconciliation, Plant Flow Through
Effective Income Tax Rate Reconciliation, Plant Flow Through, Amount
Effective Income Tax Rate Reconciliation, Plant Flow Through, Amount
Entity Address, Address Line Two
Entity Address, Address Line Two
Net income
Net income
Net income (loss) attributable to common shareholders
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Distributions to member
Payments of Distributions to Affiliates
Current assets
Assets, Current [Abstract]
Total mark-to-market derivative liabilities
Total mark-to-market derivative liabilities
Derivative Liability
Senior Notes
Senior Notes [Member]
Entity Address, Address Line One
Entity Address, Address Line One
Income taxes
Income Tax Expense (Benefit)
Other Non-Cash Operating Activities [Abstract]
Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Noncash Item [Abstract]
Notes payable, noncurrent
Notes Payable, Noncurrent
Nuclear Decommissioning [Member]
Nuclear Decommissioning [Member]
Represents estimated future nuclear decommissioning costs that exceed (regulatory asset) or are less than (regulatory liability) the associated decommissioning trust fund assets.
Statement [Table]
Statement [Table]
Supplemental Financial Information [Abstract]
Supplemental Financial Information [Abstract]
Supplemental Financial Information [Abstract]
Regulatory liabilities
Regulatory Liability, Current
Derivative, term of contract
Derivative, Contract Term
Transaction Price Allocated to Remaining Performance Obligations
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table Text Block]
Pepco Holdings LLC
Pepco Holdings LLC [Member]
Pepco Holdings LLC [Member]
Debt Conversion, Converted Instrument, Amount
Debt Conversion, Converted Instrument, Amount
Public Utility, Property, Plant and Equipment [Line Items]
Public Utility, Property, Plant and Equipment [Line Items]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Change in Contract with Customer, Asset and Liability
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]
Regulatory Matters Assets and Liabilities [Table]
Regulatory Matters Assets and Liabilities [Table]
Regulatory Matters Assets and Liabilities [Table]
Accrued Expenses [Abstract]
Accrued Liabilities [Abstract]
Significant Accounting Policies (All Registrants)
Basis of Presentation and Significant Accounting Policies [Text Block]
Non-pension postretirement benefit obligations
Liability, Other Postretirement Defined Benefit Plan, Noncurrent
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Secured Overnight Financing Rate (SOFR) [Member]