Soliciting Material Soliciting Material Written Communications Written Communications Baltimore Gas and Electric Company [Member] Baltimore Gas and Electric Company [Member] Document [Domain] Document [Domain] Local Phone Number Local Phone Number Document Information [Line Items] Document Information [Line Items] Amendment Flag Amendment Flag Potomac Electric Power Company [Member] Potomac Electric Power Company [Member] Potomac Electric Power Company [Member] PECO Energy Co [Member] PECO Energy Co [Member] PECO Energy Co [Member] Entity Emerging Growth Company Entity Emerging Growth Company Entity File Number Entity File Number Security Exchange Name Security Exchange Name Entity Address, State or Province Entity Address, State or Province Entity Address, Address Line One Entity Address, Address Line One Entity Address, Address Line Two Entity Address, Address Line Two DELAWARE DELAWARE City Area Code City Area Code DISTRICT OF COLUMBIA DISTRICT OF COLUMBIA Delmarva Power and Light Company [Member] Delmarva Power and Light Company [Member] Delmarva Power and Light Company [Member] Cover page. Cover [Abstract] Document Period End Date Document Period End Date Document Information [Table] Document Information [Table] Geographical [Axis] Geographical [Axis] Pre-commencement Tender Offer Pre-commencement Tender Offer Pepco Holdings LLC [Member] Pepco Holdings LLC [Member] Pepco Holdings LLC [Member] Commonwealth Edison Co [Member] Commonwealth Edison Co [Member] Commonwealth Edison Co [Member] Entity Central Index Key Entity Central Index Key Document Information, Document [Axis] Document Information, Document [Axis] Pre-commencement Issuer Tender Offer Pre-commencement Issuer Tender Offer Legal Entity [Axis] Legal Entity [Axis] Entity Tax Identification Number Entity Tax Identification Number Entity Registrant Name Entity Registrant Name Entity [Domain] Entity [Domain] Trading Symbol Trading Symbol VIRGINIA VIRGINIA Geographical [Domain] Geographical [Domain] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Title of 12(b) Security Title of 12(b) Security Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Address, City or Town Entity Address, City or Town Atlantic City Electric Company [Member] Atlantic City Electric Company [Member] Atlantic City Electric Company [Member] Document Type Document Type