XML 261 R159.htm IDEA: XBRL DOCUMENT v3.22.4
Supplemental Financial Information - Supplemental Balance Sheet Information (Details) - USD ($)
$ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Investments [Abstract]      
Total Investments $ 232 $ 250  
Accrued Expenses [Abstract]      
Compensation-related accruals 613 596  
Taxes accrued 211 253  
Interest accrued 338 297  
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Disposal Group, Including Discontinued Operations   582 $ 332
Other Equity Method Investments      
Investments [Abstract]      
Equity Method Investments 16 15  
Employee benefit trusts and investments      
Investments [Abstract]      
Employee benefit trusts and investments 216 235  
Commonwealth Edison Co [Member]      
Investments [Abstract]      
Total Investments 6 6  
Accrued Expenses [Abstract]      
Compensation-related accruals 179 155  
Taxes accrued 92 94  
Interest accrued 124 116  
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Disposal Group, Including Discontinued Operations   0 0
Commonwealth Edison Co [Member] | Other Equity Method Investments      
Investments [Abstract]      
Equity Method Investments 6 6  
Commonwealth Edison Co [Member] | Employee benefit trusts and investments      
Investments [Abstract]      
Employee benefit trusts and investments 0 0  
PECO Energy Co [Member]      
Investments [Abstract]      
Total Investments 30 34  
Accrued Expenses [Abstract]      
Compensation-related accruals 81 77  
Taxes accrued 10 14  
Interest accrued 47 41  
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Disposal Group, Including Discontinued Operations   0 0
PECO Energy Co [Member] | Other Equity Method Investments      
Investments [Abstract]      
Equity Method Investments 8 7  
PECO Energy Co [Member] | Employee benefit trusts and investments      
Investments [Abstract]      
Employee benefit trusts and investments 22 27  
Baltimore Gas and Electric Company [Member]      
Investments [Abstract]      
Total Investments 7 14  
Accrued Expenses [Abstract]      
Compensation-related accruals 79 78  
Taxes accrued 34 53  
Interest accrued 42 44  
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Disposal Group, Including Discontinued Operations   0 0
Baltimore Gas and Electric Company [Member] | Other Equity Method Investments      
Investments [Abstract]      
Equity Method Investments 0 0  
Baltimore Gas and Electric Company [Member] | Employee benefit trusts and investments      
Investments [Abstract]      
Employee benefit trusts and investments 7 14  
Pepco Holdings LLC [Member]      
Investments [Abstract]      
Total Investments 138 145  
Accrued Expenses [Abstract]      
Compensation-related accruals 104 113  
Taxes accrued 70 96  
Interest accrued 61 52  
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Disposal Group, Including Discontinued Operations   0 0
Pepco Holdings LLC [Member] | Other Equity Method Investments      
Investments [Abstract]      
Equity Method Investments 0 0  
Pepco Holdings LLC [Member] | Employee benefit trusts and investments      
Investments [Abstract]      
Employee benefit trusts and investments 138 145  
Potomac Electric Power Company [Member]      
Investments [Abstract]      
Total Investments 119 120  
Accrued Expenses [Abstract]      
Compensation-related accruals 29 35  
Taxes accrued 52 88  
Interest accrued 32 28  
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Disposal Group, Including Discontinued Operations   0 0
Potomac Electric Power Company [Member] | Other Equity Method Investments      
Investments [Abstract]      
Equity Method Investments 0 0  
Potomac Electric Power Company [Member] | Employee benefit trusts and investments      
Investments [Abstract]      
Employee benefit trusts and investments 119 120  
Delmarva Power & Light Company [Member]      
Accrued Expenses [Abstract]      
Compensation-related accruals 20 20  
Taxes accrued 8 9  
Interest accrued 9 8  
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Disposal Group, Including Discontinued Operations   0 0
Atlantic City Electric Company [Member]      
Accrued Expenses [Abstract]      
Compensation-related accruals 16 17  
Taxes accrued 12 11  
Interest accrued $ 14 11  
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Disposal Group, Including Discontinued Operations   $ 0 $ 0