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Lessee - Narrative (Details)
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Lessee, Lease, Description [Line Items]      
Operating Lease, Weighted Average Remaining Lease Term 9 years 6 months 8 years 10 months 24 days 9 years
Operating Lease, Weighted Average Discount Rate, Percent 3.90% 4.00% 4.00%
Real Estate [Member]      
Lessee, Lease, Description [Line Items]      
Lessee, Operating Lease, Description ●    
Vehicles [Member]      
Lessee, Lease, Description [Line Items]      
Lessee, Operating Lease, Description ●    
Minimum [Member]      
Lessee, Lease, Description [Line Items]      
Remaining lease terms, Lessee, Operating Lease 1 year    
Options to extend the term, Lessee, Operating Lease 3 years    
Option to terminate within, Lessee, Operating Lease 1 years    
Maximum [Member]      
Lessee, Lease, Description [Line Items]      
Remaining lease terms, Lessee, Operating Lease 83 years    
Options to extend the term, Lessee, Operating Lease 30 years    
Option to terminate within, Lessee, Operating Lease 10 years    
Commonwealth Edison Co [Member]      
Lessee, Lease, Description [Line Items]      
Operating Lease, Weighted Average Remaining Lease Term 1 year 3 years 3 months 18 days 3 years 9 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent 2.60% 2.80% 3.00%
Commonwealth Edison Co [Member] | Real Estate [Member]      
Lessee, Lease, Description [Line Items]      
Lessee, Operating Lease, Description ●    
Commonwealth Edison Co [Member] | Vehicles [Member]      
Lessee, Lease, Description [Line Items]      
Lessee, Operating Lease, Description ●    
Commonwealth Edison Co [Member] | Minimum [Member]      
Lessee, Lease, Description [Line Items]      
Remaining lease terms, Lessee, Operating Lease 1 year    
Options to extend the term, Lessee, Operating Lease N/A years    
Option to terminate within, Lessee, Operating Lease 1 years    
Commonwealth Edison Co [Member] | Maximum [Member]      
Lessee, Lease, Description [Line Items]      
Remaining lease terms, Lessee, Operating Lease 3 years    
Options to extend the term, Lessee, Operating Lease N/A years    
Option to terminate within, Lessee, Operating Lease 1 years    
PECO Energy Co [Member]      
Lessee, Lease, Description [Line Items]      
Operating Lease, Weighted Average Remaining Lease Term 5 years 6 months 6 years 1 month 6 days 4 years 2 months 12 days
Operating Lease, Weighted Average Discount Rate, Percent 2.30% 2.20% 2.90%
PECO Energy Co [Member] | Real Estate [Member]      
Lessee, Lease, Description [Line Items]      
Lessee, Operating Lease, Description ●    
PECO Energy Co [Member] | Vehicles [Member]      
Lessee, Lease, Description [Line Items]      
Lessee, Operating Lease, Description ●    
PECO Energy Co [Member] | Minimum [Member]      
Lessee, Lease, Description [Line Items]      
Remaining lease terms, Lessee, Operating Lease 1 year    
PECO Energy Co [Member] | Maximum [Member]      
Lessee, Lease, Description [Line Items]      
Remaining lease terms, Lessee, Operating Lease 11 years    
Baltimore Gas and Electric Company [Member]      
Lessee, Lease, Description [Line Items]      
Operating Lease, Weighted Average Remaining Lease Term 70 years 10 months 24 days 13 years 8 months 12 days 8 years 3 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent 4.50% 4.00% 3.80%
Baltimore Gas and Electric Company [Member] | Real Estate [Member]      
Lessee, Lease, Description [Line Items]      
Lessee, Operating Lease, Description ●    
Baltimore Gas and Electric Company [Member] | Vehicles [Member]      
Lessee, Lease, Description [Line Items]      
Lessee, Operating Lease, Description ●    
Baltimore Gas and Electric Company [Member] | Minimum [Member]      
Lessee, Lease, Description [Line Items]      
Remaining lease terms, Lessee, Operating Lease 1 year    
Option to terminate within, Lessee, Operating Lease N/A years    
Baltimore Gas and Electric Company [Member] | Maximum [Member]      
Lessee, Lease, Description [Line Items]      
Remaining lease terms, Lessee, Operating Lease 83 years    
Option to terminate within, Lessee, Operating Lease N/A years    
Pepco Holdings LLC [Member]      
Lessee, Lease, Description [Line Items]      
Operating Lease, Weighted Average Remaining Lease Term 6 years 9 months 18 days 7 years 6 months 8 years 2 months 12 days
Finance Lease, Weighted Average Remaining Lease Term 5 years 6 months 6 years 1 month 6 days 6 years 6 months
Operating Lease, Weighted Average Discount Rate, Percent 4.20% 4.20% 4.20%
Finance Lease, Weighted Average Discount Rate, Percent 2.30% 2.20% 2.50%
Pepco Holdings LLC [Member] | Real Estate [Member]      
Lessee, Lease, Description [Line Items]      
Lessee, Operating Lease, Description ●    
Pepco Holdings LLC [Member] | Vehicles [Member]      
Lessee, Lease, Description [Line Items]      
Lessee, Operating Lease, Description ●    
Pepco Holdings LLC [Member] | Minimum [Member]      
Lessee, Lease, Description [Line Items]      
Remaining lease terms, Lessee, Operating Lease 1 year    
Options to extend the term, Lessee, Operating Lease 3 years    
Pepco Holdings LLC [Member] | Maximum [Member]      
Lessee, Lease, Description [Line Items]      
Remaining lease terms, Lessee, Operating Lease 9 years    
Options to extend the term, Lessee, Operating Lease 30 years    
Potomac Electric Power Company [Member]      
Lessee, Lease, Description [Line Items]      
Operating Lease, Weighted Average Remaining Lease Term 8 years 1 month 6 days 8 years 7 months 6 days 9 years 1 month 6 days
Finance Lease, Weighted Average Remaining Lease Term 5 years 4 months 24 days 5 years 10 months 24 days 6 years 3 months 18 days
Operating Lease, Weighted Average Discount Rate, Percent 4.00% 4.00% 4.00%
Finance Lease, Weighted Average Discount Rate, Percent 2.30% 2.30% 2.60%
Potomac Electric Power Company [Member] | Real Estate [Member]      
Lessee, Lease, Description [Line Items]      
Lessee, Operating Lease, Description ●    
Potomac Electric Power Company [Member] | Vehicles [Member]      
Lessee, Lease, Description [Line Items]      
Lessee, Operating Lease, Description ●    
Potomac Electric Power Company [Member] | Minimum [Member]      
Lessee, Lease, Description [Line Items]      
Remaining lease terms, Lessee, Operating Lease 1 year    
Options to extend the term, Lessee, Operating Lease 5 years    
Potomac Electric Power Company [Member] | Maximum [Member]      
Lessee, Lease, Description [Line Items]      
Remaining lease terms, Lessee, Operating Lease 9 years    
Options to extend the term, Lessee, Operating Lease 5 years    
Delmarva Power & Light Company [Member]      
Lessee, Lease, Description [Line Items]      
Operating Lease, Weighted Average Remaining Lease Term 7 years 10 months 24 days 8 years 6 months 9 years 1 month 6 days
Finance Lease, Weighted Average Remaining Lease Term 5 years 6 months 6 years 1 month 6 days 6 years 6 months
Operating Lease, Weighted Average Discount Rate, Percent 4.00% 4.00% 4.00%
Finance Lease, Weighted Average Discount Rate, Percent 2.30% 2.10% 2.40%
Delmarva Power & Light Company [Member] | Real Estate [Member]      
Lessee, Lease, Description [Line Items]      
Lessee, Operating Lease, Description ●    
Delmarva Power & Light Company [Member] | Vehicles [Member]      
Lessee, Lease, Description [Line Items]      
Lessee, Operating Lease, Description ●    
Delmarva Power & Light Company [Member] | Minimum [Member]      
Lessee, Lease, Description [Line Items]      
Remaining lease terms, Lessee, Operating Lease 1 year    
Options to extend the term, Lessee, Operating Lease 3 years    
Delmarva Power & Light Company [Member] | Maximum [Member]      
Lessee, Lease, Description [Line Items]      
Remaining lease terms, Lessee, Operating Lease 9 years    
Options to extend the term, Lessee, Operating Lease 30 years    
Atlantic City Electric Company [Member]      
Lessee, Lease, Description [Line Items]      
Operating Lease, Weighted Average Remaining Lease Term 3 years 3 months 18 days 3 years 6 months 4 years
Finance Lease, Weighted Average Remaining Lease Term 5 years 7 months 6 days 6 years 3 months 18 days 6 years 6 months
Operating Lease, Weighted Average Discount Rate, Percent 3.30% 3.40% 3.50%
Finance Lease, Weighted Average Discount Rate, Percent 2.40% 2.10% 2.40%
Atlantic City Electric Company [Member] | Real Estate [Member]      
Lessee, Lease, Description [Line Items]      
Lessee, Operating Lease, Description ●    
Atlantic City Electric Company [Member] | Vehicles [Member]      
Lessee, Lease, Description [Line Items]      
Lessee, Operating Lease, Description ●    
Atlantic City Electric Company [Member] | Minimum [Member]      
Lessee, Lease, Description [Line Items]      
Remaining lease terms, Lessee, Operating Lease 1 year    
Options to extend the term, Lessee, Operating Lease 5 years    
Atlantic City Electric Company [Member] | Maximum [Member]      
Lessee, Lease, Description [Line Items]      
Remaining lease terms, Lessee, Operating Lease 7 years    
Options to extend the term, Lessee, Operating Lease 5 years