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Debt and Credit Agreements (All Registrants) - Summary of Revolving Credit Agreements (Details) - Revolving Credit Facility
$ in Millions
Sep. 30, 2024
USD ($)
Commonwealth Edison Co  
Line of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity $ 1,000
Line of credit facility, interest rate at period end 1.00%
PECO Energy Co  
Line of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity $ 600
Line of credit facility, interest rate at period end 0.90%
Baltimore Gas and Electric Company  
Line of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity $ 600
Line of credit facility, interest rate at period end 0.90%
Potomac Electric Power Company  
Line of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity $ 300
Line of credit facility, interest rate at period end 1.075%
Delmarva Power and Light Company  
Line of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity $ 300
Line of credit facility, interest rate at period end 1.00%
Atlantic City Electric Company  
Line of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity $ 300
Line of credit facility, interest rate at period end 1.00%
Corporate, Non-Segment  
Line of Credit Facility [Line Items]  
Line of credit facility, maximum borrowing capacity $ 900
Line of credit facility, interest rate at period end 1.275%