Regulatory Matters- Narrative (Details)				12 Months Ended	48 Months Ended			72 Months Ended
	Feb. 02, 2022	Dec. 02, 2021 USD ($)	Feb. 15, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2024 USD ($)	Jun. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jul. 10, 2023 USD ($)	Jul. 09, 2021 USD ($)	Jul. 02, 2021 USD ($)
Regulatory Matters Additional Narrative Information [Line Items]
Carbon mitigation credit				54,500,000
Texas-based generating assets
Regulatory Matters Additional Narrative Information [Line Items]
Other Cost and Expense, Operating				$ 800,000,000
Market Payment Shortfall in Collections				17,000,000
ERCOT
Regulatory Matters Additional Narrative Information [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount			$ 9,000
Market Payment Shortfall in Collections				3,000,000,000
Market-wide Limit Recovery of Default				2,500,000
System-Wide Offer Cap		$ 5,000
ERCOT | Public Utility Commission of Texas
Regulatory Matters Additional Narrative Information [Line Items]
Securitized Funds Allocation				$ 2,100,000,000
Commonwealth Edison Co [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Carbon mitigation credit				54,500,000
Maximum increase of revenue requirement				5.00%
Basis points for ComEd's Electric Distribution rates	580
Commonwealth Edison Co [Member] | Minimum [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Basis points for ComEd's Electric Distribution rates				20
Commonwealth Edison Co [Member] | Maximum [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Basis points for ComEd's Electric Distribution rates				60
Baltimore Gas and Electric Company [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Maryland Relief Act Funds										$ 50,000,000
Potomac Electric Power Company [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Maryland Relief Act Funds										$ 12,000,000
Potomac Electric Power Company [Member] | Forecast [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Proposed Capital Expenditure								$ 500,000,000
Delmarva Power & Light Company [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Maryland Relief Act Funds									$ 8,000,000
Atlantic City Electric Company [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Proposed Capital Expenditure					$ 220,000,000
Atlantic City Electric Company [Member] | Forecast [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Proposed Capital Expenditure							$ 338,000,000
Public Utilities, Approved Rate Increase (Decrease), Amount						$ 96,000,000