Debt and Credit Agreements (All Registrants) - Issuance of Long-Term Debt (Details) $ in Millions	Jun. 30, 2026 USD ($)
Corporate \| Notes495DueMar2036 \| Senior Notes
Debt Instrument [Line Items]
Interest Rate	4.95%
Amount	$ 775
Commonwealth Edison Co \| FMB455DueJun2031 \| First Mortgage
Debt Instrument [Line Items]
Interest Rate	4.55%
Amount	$ 600
Commonwealth Edison Co \| FMB585DueJune2056 \| First Mortgage
Debt Instrument [Line Items]
Interest Rate	5.85%
Amount	$ 825
Baltimore Gas and Electric Company \| Notes515DueJun2033 \| Notes Payable to Banks
Debt Instrument [Line Items]
Interest Rate	5.15%
Amount	$ 500
Baltimore Gas and Electric Company \| Notes605DueJune2056 \| Notes Payable to Banks
Debt Instrument [Line Items]
Interest Rate	6.05%
Amount	$ 425
Potomac Electric Power Company \| FMB500DueMar2036 \| First Mortgage
Debt Instrument [Line Items]
Interest Rate	5.00%
Amount	$ 110
Potomac Electric Power Company \| FMB530DueMar2041 \| First Mortgage
Debt Instrument [Line Items]
Interest Rate	5.30%
Amount	$ 60
Potomac Electric Power Company \| FMB574DueMar2056 \| First Mortgage
Debt Instrument [Line Items]
Interest Rate	5.74%
Amount	$ 130
Delmarva Power and Light Company \| FMB574DueMar2056 \| First Mortgage
Debt Instrument [Line Items]
Interest Rate	5.74%
Amount	$ 75
Delmarva Power and Light Company \| FMB500DueSep2036 \| First Mortgage
Debt Instrument [Line Items]
Interest Rate	5.00%
Amount	$ 75
Atlantic City Electric Company \| FMB495DueMar2036 \| First Mortgage
Debt Instrument [Line Items]
Interest Rate	4.95%
Amount	$ 100