v3.26.3
Accounts Receivable - Unbilled Customer Revenue (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Unbilled customer revenue $ 887 $ 1,231
Commonwealth Edison Co    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Unbilled customer revenue 313 301
PECO Energy Co    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Unbilled customer revenue 160 278
Baltimore Gas and Electric Company    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Unbilled customer revenue 180 325
Pepco Holdings LLC    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Unbilled customer revenue 234 327
Potomac Electric Power Company    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Unbilled customer revenue 122 155
Delmarva Power and Light Company    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Unbilled customer revenue 59 100
Atlantic City Electric Company    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Unbilled customer revenue $ 53 $ 72