v3.25.2
Related Party Transactions - Current Receivables From/Payables To Affiliates (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Related Party    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current $ 258 $ 281
Accounts payable 5 5
Commonwealth Edison Co | Affiliated Entity    
Related Party Transaction [Line Items]    
Accounts payable 66 77
Commonwealth Edison Co | PECO Energy Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 8 0
Commonwealth Edison Co | Baltimore Gas And Electric Company Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Commonwealth Edison Co | Pepco Holdings LLC Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Commonwealth Edison Co | Potomac Electric Power Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Commonwealth Edison Co | Delmarva Power and Light Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Commonwealth Edison Co | Atlantic City Electric Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Commonwealth Edison Co | Other Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 4 4
Commonwealth Edison Co | Related Party    
Related Party Transaction [Line Items]    
Accounts payable 66 77
Receivables from affiliates 12 4
PECO Energy Co | Affiliated Entity    
Related Party Transaction [Line Items]    
Accounts payable 45 41
PECO Energy Co | Commonwealth Edison Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
PECO Energy Co | Baltimore Gas And Electric Company Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
PECO Energy Co | Pepco Holdings LLC Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
PECO Energy Co | Potomac Electric Power Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
PECO Energy Co | Delmarva Power and Light Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
PECO Energy Co | Atlantic City Electric Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
PECO Energy Co | Other Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
PECO Energy Co | Related Party    
Related Party Transaction [Line Items]    
Accounts payable 45 41
Receivables from affiliates 0 0
Baltimore Gas and Electric Company | Affiliated Entity    
Related Party Transaction [Line Items]    
Accounts payable 36 48
Baltimore Gas and Electric Company | Commonwealth Edison Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Baltimore Gas and Electric Company | PECO Energy Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Baltimore Gas and Electric Company | Pepco Holdings LLC Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Baltimore Gas and Electric Company | Potomac Electric Power Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Baltimore Gas and Electric Company | Delmarva Power and Light Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Baltimore Gas and Electric Company | Atlantic City Electric Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Baltimore Gas and Electric Company | Other Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Baltimore Gas and Electric Company | Related Party    
Related Party Transaction [Line Items]    
Accounts payable 36 48
Receivables from affiliates 0 0
Pepco Holdings LLC | Affiliated Entity    
Related Party Transaction [Line Items]    
Accounts payable 16 18
Pepco Holdings LLC | Related Party    
Related Party Transaction [Line Items]    
Accounts payable 55 66
Receivables from affiliates 11 8
Potomac Electric Power Company | Affiliated Entity    
Related Party Transaction [Line Items]    
Accounts payable 34 37
Potomac Electric Power Company | Commonwealth Edison Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Potomac Electric Power Company | PECO Energy Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Potomac Electric Power Company | Baltimore Gas And Electric Company Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Potomac Electric Power Company | Pepco Holdings LLC Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Potomac Electric Power Company | Delmarva Power and Light Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Potomac Electric Power Company | Atlantic City Electric Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 1 0
Potomac Electric Power Company | Other Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 1
Potomac Electric Power Company | Related Party    
Related Party Transaction [Line Items]    
Accounts payable 34 37
Receivables from affiliates 1 1
Delmarva Power and Light Company | Affiliated Entity    
Related Party Transaction [Line Items]    
Accounts payable 24 26
Delmarva Power and Light Company | Commonwealth Edison Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Delmarva Power and Light Company | PECO Energy Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Delmarva Power and Light Company | Baltimore Gas And Electric Company Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Delmarva Power and Light Company | Pepco Holdings LLC Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Delmarva Power and Light Company | Potomac Electric Power Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Delmarva Power and Light Company | Atlantic City Electric Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Delmarva Power and Light Company | Other Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 1 0
Delmarva Power and Light Company | Related Party    
Related Party Transaction [Line Items]    
Accounts payable 24 26
Receivables from affiliates 1 0
Atlantic City Electric Company | Affiliated Entity    
Related Party Transaction [Line Items]    
Accounts payable 21 22
Atlantic City Electric Company | Commonwealth Edison Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Atlantic City Electric Company | PECO Energy Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Atlantic City Electric Company | Baltimore Gas And Electric Company Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Atlantic City Electric Company | Pepco Holdings LLC Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Atlantic City Electric Company | Potomac Electric Power Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Atlantic City Electric Company | Delmarva Power and Light Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
Atlantic City Electric Company | Other Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 10 7
Atlantic City Electric Company | Related Party    
Related Party Transaction [Line Items]    
Accounts payable 21 22
Receivables from affiliates 10 7
Business Services Company | Commonwealth Edison Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 61 67
Business Services Company | PECO Energy Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 35 37
Business Services Company | Baltimore Gas And Electric Company Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 35 47
Business Services Company | Pepco Holdings LLC Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 5 7
Business Services Company | Potomac Electric Power Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 18 21
Business Services Company | Delmarva Power and Light Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 11 14
Business Services Company | Atlantic City Electric Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 9 11
Business Services Company | Other Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 1 0
Business Services Company | Related Party    
Related Party Transaction [Line Items]    
Receivables from affiliates 175 204
PHI Service Company | Commonwealth Edison Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
PHI Service Company | PECO Energy Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
PHI Service Company | Baltimore Gas And Electric Company Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
PHI Service Company | Pepco Holdings LLC Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 1
PHI Service Company | Potomac Electric Power Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 16 15
PHI Service Company | Delmarva Power and Light Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 12 11
PHI Service Company | Atlantic City Electric Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 11 10
PHI Service Company | Other Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 0
PHI Service Company | Related Party    
Related Party Transaction [Line Items]    
Receivables from affiliates 39 37
Other Legal Entities | Affiliated Entity    
Related Party Transaction [Line Items]    
Accounts payable 16 12
Other Legal Entities | Commonwealth Edison Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 5 10
Other Legal Entities | PECO Energy Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 2 4
Other Legal Entities | Baltimore Gas And Electric Company Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 1 1
Other Legal Entities | Pepco Holdings LLC Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 11 10
Other Legal Entities | Potomac Electric Power Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 1
Other Legal Entities | Delmarva Power and Light Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 1 1
Other Legal Entities | Atlantic City Electric Co Affiliate    
Related Party Transaction [Line Items]    
Related party transaction, due from (to) related party, current 0 1
Other Legal Entities | Related Party    
Related Party Transaction [Line Items]    
Receivables from affiliates $ 20 $ 28