v3.25.2
Related Party Transactions - Long Term Debt to Financing Trusts (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Related Party Transaction [Line Items]    
Long-term debt to financing trusts $ 390 $ 390
ComEd Financing III    
Related Party Transaction [Line Items]    
Long-term debt to financing trusts 206 206
PECO Trust III    
Related Party Transaction [Line Items]    
Long-term debt to financing trusts 81 81
PECO Trust IV    
Related Party Transaction [Line Items]    
Long-term debt to financing trusts 103 103
Related Party    
Related Party Transaction [Line Items]    
Long-term debt to financing trusts 390 390
Commonwealth Edison Co | ComEd Financing III    
Related Party Transaction [Line Items]    
Long-term debt to financing trusts 206 206
Commonwealth Edison Co | PECO Trust III    
Related Party Transaction [Line Items]    
Long-term debt to financing trusts 0 0
Commonwealth Edison Co | PECO Trust IV    
Related Party Transaction [Line Items]    
Long-term debt to financing trusts 0 0
Commonwealth Edison Co | Related Party    
Related Party Transaction [Line Items]    
Long-term debt to financing trusts 206 206
PECO Energy Co | ComEd Financing III    
Related Party Transaction [Line Items]    
Long-term debt to financing trusts 0 0
PECO Energy Co | PECO Trust III    
Related Party Transaction [Line Items]    
Long-term debt to financing trusts 81 81
PECO Energy Co | PECO Trust IV    
Related Party Transaction [Line Items]    
Long-term debt to financing trusts 103 103
PECO Energy Co | Related Party    
Related Party Transaction [Line Items]    
Long-term debt to financing trusts $ 184 $ 184