v3.26.1
Supplemental Financial Information - Balance Sheet (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Jun. 30, 2025
Dec. 31, 2024
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]        
Cash and cash equivalents $ 1,813 $ 626 $ 724 $ 357
Restricted cash 608 525 478 541
Restricted cash included in other long-term assets 9 50 49 41
Total cash, restricted cash, and cash equivalents 2,430 1,201 1,251 939
Accrued Expenses [Abstract]        
Compensation-related accruals 503 705    
Taxes accrued 224 242    
Interest accrued 583 538    
Commonwealth Edison Co        
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]        
Cash and cash equivalents 704 159 387 105
Restricted cash 533 454 411 486
Restricted cash included in other long-term assets 9 50 49 41
Total cash, restricted cash, and cash equivalents 1,246 663 847 632
Accrued Expenses [Abstract]        
Compensation-related accruals 140 209    
Taxes accrued 91 94    
Interest accrued 165 155    
PECO Energy Co        
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]        
Cash and cash equivalents 39 116 25 48
Restricted cash 0 0 0 0
Restricted cash included in other long-term assets 0 0 0 0
Total cash, restricted cash, and cash equivalents 39 116 25 48
Accrued Expenses [Abstract]        
Compensation-related accruals 77 96    
Taxes accrued 6 306    
Interest accrued 75 75    
Baltimore Gas and Electric Company        
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]        
Cash and cash equivalents 1,010 217 236 33
Restricted cash 4 3 5 1
Restricted cash included in other long-term assets 0 0 0 0
Total cash, restricted cash, and cash equivalents 1,014 220 241 34
Accrued Expenses [Abstract]        
Compensation-related accruals 69 99    
Taxes accrued 32 191    
Interest accrued 58 55    
Pepco Holdings LLC        
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]        
Cash and cash equivalents 47 103 67 139
Restricted cash 36 38 30 24
Restricted cash included in other long-term assets 0 0 0 0
Total cash, restricted cash, and cash equivalents 83 141 97 163
Accrued Expenses [Abstract]        
Compensation-related accruals 102 125    
Taxes accrued 88 107    
Interest accrued 99 92    
Potomac Electric Power Company        
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]        
Cash and cash equivalents 21 22 22 30
Restricted cash 31 33 22 21
Restricted cash included in other long-term assets 0 0 0 0
Total cash, restricted cash, and cash equivalents 52 55 44 51
Accrued Expenses [Abstract]        
Compensation-related accruals 29 35    
Taxes accrued 64 69    
Interest accrued 52 49    
Delmarva Power and Light Company        
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]        
Cash and cash equivalents 8 9 9 21
Restricted cash 2 3 5 2
Restricted cash included in other long-term assets 0 0 0 0
Total cash, restricted cash, and cash equivalents 10 12 14 23
Accrued Expenses [Abstract]        
Compensation-related accruals 21 24    
Taxes accrued 10 25    
Interest accrued 20 18    
Atlantic City Electric Company        
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]        
Cash and cash equivalents 13 22 15 14
Restricted cash 2 2 2 0
Restricted cash included in other long-term assets 0 0 0 0
Total cash, restricted cash, and cash equivalents 15 24 $ 17 $ 14
Accrued Expenses [Abstract]        
Compensation-related accruals 15 17    
Taxes accrued 10 18    
Interest accrued $ 22 $ 20