Debt and Credit Agreements (All Registrants) - Issuance of Long-Term Debt (Details) - USD ($) $ in Millions	Mar. 31, 2024	Mar. 20, 2024
Corporate | Notes515DueMar2029 | Notes Payable to Banks
Debt Instrument [Line Items]
Interest Rate	5.15%
Debt instrument, face amount	$ 650
Corporate | Notes545DueMar2034 | Notes Payable to Banks
Debt Instrument [Line Items]
Interest Rate	5.45%
Debt instrument, face amount	$ 650
Corporate | Note560DueMar2053 | Notes Payable to Banks
Debt Instrument [Line Items]
Interest Rate	5.60%
Debt instrument, face amount	$ 400
Potomac Electric Power Company | Note520DueMar2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	5.20%
Debt instrument, face amount	$ 375
Potomac Electric Power Company | Notes550DueMar2054 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	5.50%
Debt instrument, face amount	$ 300
Delmarva Power and Light Company | Notes524DueMar2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	5.24%
Debt instrument, face amount	$ 100
Delmarva Power and Light Company | Notes555DueMar2054 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	5.55%
Debt instrument, face amount	$ 75
Atlantic City Electric Company | Notes555DueMar2054 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate	5.55%
Debt instrument, face amount	$ 75
Atlantic City Electric Company | Notes529DueAug2034 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate		5.29%
Debt instrument, face amount		$ 75
Atlantic City Electric Company | Notes549DueAug2039 | First Mortgage Bonds
Debt Instrument [Line Items]
Interest Rate		5.49%
Debt instrument, face amount		$ 100