Income Taxes - Narrative (Details) - USD ($) $ in Millions		6 Months Ended
	Aug. 16, 2022	Jun. 30, 2023
Income Tax Additional Narrative Information [Line Items]
Income Tax Credits and Adjustments		$ 15
Income Taxes Receivable, Current		17
Notes Payable, Current		8
Notes Payable, Noncurrent		524
Tax Credit Carryforward, Valuation Allowance		0
US Treasury (UST) Interest Rate
Income Tax Additional Narrative Information [Line Items]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent	15.00%
Atlantic City Electric Company [Member]
Income Tax Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets		(20)
PECO Energy Co [Member]
Income Tax Additional Narrative Information [Line Items]
Increase (Decrease) in Regulatory Assets		87
State and Local Jurisdiction [Member] | Atlantic City Electric Company [Member]
Income Tax Additional Narrative Information [Line Items]
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit		14
Federal and State
Income Tax Additional Narrative Information [Line Items]
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount		67
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount		$ 40