v3.25.2
Supplemental Financial Information - Balance Sheet (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Jun. 30, 2024
Dec. 31, 2023
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]        
Cash and cash equivalents $ 724 $ 357 $ 934 $ 445
Restricted cash 478 541 530 482
Restricted cash included in other long-term assets 49 41 71 174
Total cash, restricted cash, and cash equivalents 1,251 939 1,535 1,101
Accrued Expenses [Abstract]        
Compensation-related accruals 504 679    
Taxes accrued 193 217    
Interest accrued 530 468    
Other 536 512    
Commonwealth Edison Co        
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]        
Cash and cash equivalents 387 105 326 110
Restricted cash 411 486 446 402
Restricted cash included in other long-term assets 49 41 71 174
Total cash, restricted cash, and cash equivalents 847 632 843 686
Accrued Expenses [Abstract]        
Compensation-related accruals 138 197    
Taxes accrued 90 96    
Interest accrued 156 150    
PECO Energy Co        
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]        
Cash and cash equivalents 25 48 19 42
Restricted cash 0 0 9 9
Restricted cash included in other long-term assets 0 0 0 0
Total cash, restricted cash, and cash equivalents 25 48 28 51
Accrued Expenses [Abstract]        
Compensation-related accruals 77 87    
Taxes accrued 4 13    
Interest accrued 60 60    
Baltimore Gas and Electric Company        
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]        
Cash and cash equivalents 236 33 428 47
Restricted cash 5 1 0 1
Restricted cash included in other long-term assets 0 0 0 0
Total cash, restricted cash, and cash equivalents 241 34 428 48
Accrued Expenses [Abstract]        
Compensation-related accruals 70 88    
Taxes accrued 29 34    
Interest accrued 56 50    
Pepco Holdings LLC        
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]        
Cash and cash equivalents 67 139 119 180
Restricted cash 30 24 22 24
Restricted cash included in other long-term assets 0 0 0 0
Total cash, restricted cash, and cash equivalents 97 163 141 204
Accrued Expenses [Abstract]        
Compensation-related accruals 96 132    
Taxes accrued 84 110    
Interest accrued 91 83    
Potomac Electric Power Company        
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]        
Cash and cash equivalents 22 30 19 48
Restricted cash 22 21 21 24
Restricted cash included in other long-term assets 0 0 0 0
Total cash, restricted cash, and cash equivalents 44 51 40 72
Accrued Expenses [Abstract]        
Compensation-related accruals 29 38    
Taxes accrued 64 92    
Interest accrued 48 44    
Delmarva Power and Light Company        
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]        
Cash and cash equivalents 9 21 50 16
Restricted cash 5 2 1 0
Restricted cash included in other long-term assets 0 0 0 0
Total cash, restricted cash, and cash equivalents 14 23 51 16
Accrued Expenses [Abstract]        
Compensation-related accruals 19 26    
Taxes accrued 9 11    
Interest accrued 18 16    
Atlantic City Electric Company        
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents [Abstract]        
Cash and cash equivalents 15 14 15 21
Restricted cash 2 0 0 0
Restricted cash included in other long-term assets 0 0 0 0
Total cash, restricted cash, and cash equivalents 17 14 $ 15 $ 21
Accrued Expenses [Abstract]        
Compensation-related accruals 13 18    
Taxes accrued 9 11    
Interest accrued $ 20 $ 18