Debt and Credit Agreements (All Registrants) - Summary of Revolving Credit Agreements (Details) - Revolving Credit Facility $ in Millions	6 Months Ended
	Jun. 30, 2025 USD ($)
Commonwealth Edison Co
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 1,000
Debt instrument, interest rate terms	1.00%
PECO Energy Co
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 600
Debt instrument, interest rate terms	0.90%
Baltimore Gas and Electric Company
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 600
Debt instrument, interest rate terms	0.90%
Potomac Electric Power Company
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 300
Debt instrument, interest rate terms	1.00%
Delmarva Power and Light Company
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 300
Debt instrument, interest rate terms	1.00%
Atlantic City Electric Company
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 300
Debt instrument, interest rate terms	1.00%
Corporate, Non-Segment
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 900
Debt instrument, interest rate terms	1.075%