- Definition

Maximum basis points that can be added to the average rate on 30-year treasury notes, to determine the allowed ROE for ComEd's revenue requirement.

+ References

No definition available.

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- Definition

Amount of public utility's requested rate increase (decrease) with regulatory agency, prior year annual reconciliation.

+ References

No definition available.

+ Details

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- Definition

Schedule of Energy Efficiency Formula Rate Updates [Line Items]

+ References

No definition available.

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- Definition

Percentage of public utility's approved equity to capital, including debt and equity.

+ References

No definition available.

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- Definition

Percentage of public utility's approved return on equity.

+ References

No definition available.

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- Definition

Percentage of public utility's requested equity to capital, including debt and equity.

+ References

No definition available.

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- Definition

Amount of public utility's amended requested rate increase (decrease) with regulatory agency.

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No definition available.

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- Definition

Amount of public utility's requested rate increase (decrease) with regulatory agency.

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No definition available.

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- Definition

Percentage of public utility's requested return on equity.

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Regulatory Matters - Energy Efficiency Formula Rate (Details) - Commonwealth Edison Co [Member] $ in Millions			12 Months Ended
	May 26, 2023 USD ($)	Feb. 03, 2022	Dec. 31, 2022
Schedule of Energy Efficiency Formula Rate Updates [Line Items]
Basis points for ComEd's Revenue Requirement		580
ComEd 2023 Energy Efficiency Formula Rate [Domain]
Schedule of Energy Efficiency Formula Rate Updates [Line Items]
Public Utilities, Requested Rate Increase (Decrease), Amount	$ 87
Public Utilities Requested Rate Increase (Decrease), Prior Year Annual Reconciliation	31
Public Utilities, Requested Rate Increase (Decrease), Amended, Amount	$ 118
Public Utilities, Requested Equity Capital Structure, Percentage	6.48%
Requested Return on Equity, Percentage	8.91%
Basis points for ComEd's Revenue Requirement	580
ComEd 2022 Energy Efficiency Formula Rate [Domain]
Schedule of Energy Efficiency Formula Rate Updates [Line Items]
Public Utilities, Approved Equity Capital Structure, Percentage			7.48%
Public Utilities, Approved Return on Equity, Percentage			10.91%