Amount of contribution received by defined benefit plan from employer which increases plan assets.

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+ Details

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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+ Details

Retirement Benefits - Defined Contribution Savings Plans (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	$ 33	$ 30	$ 97	$ 86
Commonwealth Edison Co
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	17	12	41	34
PECO Energy Co
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	5	4	14	12
Baltimore Gas and Electric Company
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	3	3	9	9
Pepco Holdings LLC
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	3	5	15	15
Potomac Electric Power Company
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	1	1	4	4
Delmarva Power and Light Company
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	1	1	3	3
Atlantic City Electric Company
Defined Benefit Plan Disclosure [Line Items]
Savings Plan Employer Contributions	$ 0	$ 1	$ 2	$ 2