Regulatory Matters - Narrative (Details) $ in Millions			3 Months Ended	36 Months Ended
	Sep. 27, 2022	Feb. 03, 2022	Mar. 31, 2023 USD ($)	Dec. 31, 2025 USD ($)	Mar. 31, 2022 USD ($)
Regulatory Matters Additional Narrative Information [Line Items]
Basis points for ComEd's Revenue Requirement		580
Commonwealth Edison Co [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets			$ 547
Beneficial electrification planned expenditure				$ 300
Maximum increase of revenue requirement			105.00%
Basis Points - ComEd Symmetrical Performance Adjustments	32
Beneficial electrification planned expenditure, annual				100
Beneficial electrification approved annual spending				$ 77
Commonwealth Edison Co [Member] | Carbon Mitigation Credit rider
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets			$ 275
Regulatory Assets			1,118
Commonwealth Edison Co [Member] | Electric Distribution Formula Rate Annual Reconciliations
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets			143
PECO Energy Co [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets			44
Increase (Decrease) in Regulatory Liabilities			45
PECO Energy Co [Member] | Nuclear Decommissioning [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Liabilities			28
PECO Energy Co [Member] | Electric Energy and Natural Gas Cost [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Liabilities			31
PECO Energy Co [Member] | Deferred Income Tax Charge [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets			48
Baltimore Gas and Electric Company [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets			66
Baltimore Gas and Electric Company [Member] | Under-recovered revenue decoupling
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets			54
Delmarva Power and Light Company [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets			(17)
Delmarva Power and Light Company [Member] | Electric Energy and Natural Gas Cost [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets			(18)
Atlantic City Electric Company [Member]
Regulatory Matters Additional Narrative Information [Line Items]
Contract Termination Liability			118		$ 203
Increase (Decrease) in Regulatory Assets			(18)
Increase (Decrease) in Regulatory Liabilities			(19)
Gain (Loss) on Contract Termination			19
Atlantic City Electric Company [Member] | Other Current Liabilities
Regulatory Matters Additional Narrative Information [Line Items]
Contract Termination Liability			87
Atlantic City Electric Company [Member] | Other Noncurrent Liabilities
Regulatory Matters Additional Narrative Information [Line Items]
Contract Termination Liability			31
Atlantic City Electric Company [Member] | Electric Energy Costs
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets			(35)
Atlantic City Electric Company [Member] | Over-recovered revenue decoupling
Regulatory Matters Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Liabilities			$ 9