Revenue from Contracts with Customers (All Registrants) - Narrative (Details)	Jul. 01, 2020 extension	Dec. 31, 2023	Jul. 02, 2020 interest	Dec. 31, 2019
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		1 year
Potomac Electric Power Company | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		1 year
Potomac Electric Power Company | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		1 year
Potomac Electric Power Company | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		1 year
Potomac Electric Power Company | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		1 year
Potomac Electric Power Company | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		1 year
Potomac Electric Power Company | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Collaborative Arrangement, Rights And Obligations, Undivided Interest	60.00%
Potomac Electric Power Company | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-07-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period				35 years
Potomac Electric Power Company | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		31 years
Potomac Electric Power Company | the Buyer | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Collaborative Arrangement, Rights And Obligations, Undivided Interest			10.00%
Collaborative Arrangement, Rights And Obligations, Number of Additional Undivided Interests | interest			2
Collaborative Arrangement, Rights And Obligations, Period	3 years
Collaborative Arrangement, Rights And Obligations, Number of Extensions | extension	2
Collaborative Arrangement, Rights And Obligations, Extension Term	2 years
Delmarva Power & Light Company | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		1 year
Delmarva Power & Light Company | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		1 year
Delmarva Power & Light Company | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		1 year
Delmarva Power & Light Company | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		1 year
Delmarva Power & Light Company | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		1 year
Delmarva Power & Light Company | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Collaborative Arrangement, Rights And Obligations, Undivided Interest	60.00%
Delmarva Power & Light Company | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-07-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period				35 years
Delmarva Power & Light Company | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		31 years
Delmarva Power & Light Company | the Buyer | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Collaborative Arrangement, Rights And Obligations, Undivided Interest			10.00%
Collaborative Arrangement, Rights And Obligations, Number of Additional Undivided Interests | interest			2
Collaborative Arrangement, Rights And Obligations, Period	3 years
Collaborative Arrangement, Rights And Obligations, Number of Extensions | extension	2
Collaborative Arrangement, Rights And Obligations, Extension Term	2 years
Atlantic City Electric Company | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		1 year
Atlantic City Electric Company | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		1 year
Atlantic City Electric Company | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		1 year
Atlantic City Electric Company | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		1 year
Atlantic City Electric Company | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2028-01-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		1 year
Atlantic City Electric Company | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Collaborative Arrangement, Rights And Obligations, Undivided Interest	60.00%
Atlantic City Electric Company | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-07-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period				35 years
Atlantic City Electric Company | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period		31 years
Atlantic City Electric Company | the Buyer | Collaborative Arrangement, Transaction with Party to Collaborative Arrangement
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Collaborative Arrangement, Rights And Obligations, Undivided Interest			10.00%
Collaborative Arrangement, Rights And Obligations, Number of Additional Undivided Interests | interest			2
Collaborative Arrangement, Rights And Obligations, Period	3 years
Collaborative Arrangement, Rights And Obligations, Number of Extensions | extension	2
Collaborative Arrangement, Rights And Obligations, Extension Term	2 years