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Derivative Instruments and Hedging Activities (Tables)
 3 Months Ended
Mar. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Schedule of Interest Rate Derivatives
Below is a summary of the interest rate hedge balances as of March 31, 2023 and December 31, 2022.
March 31, 2023
Derivatives Designated
as Hedging Instruments		Economic HedgesTotal
Other deferred debits (noncurrent assets)$— $3 $3 
Total derivative assets— 3 3 
Mark-to-market derivative liabilities (current liabilities)— (1)(1)
Mark-to-market derivative liabilities (noncurrent liabilities)(1)— (1)
Total mark-to-market derivative liabilities(1)(1)(2)
Total mark-to-market derivative net assets$(1)$2 $1 
December 31, 2022
Derivatives Designated
as Hedging Instruments		Economic HedgesTotal
Other deferred debits (noncurrent assets)$6 $5 $11 
Total derivative assets6 5 11 
Mark-to-market derivative liabilities (current liabilities)— (3)(3)
Mark-to-market derivative liabilities (noncurrent liabilities)(4)— (4)
Total mark-to-market derivative liabilities(4)(3)(7)
Total mark-to-market derivative net assets$2 $2 $4 
Economic Hedges (Commodity Price Risk)
For the three months ended March 31, 2023, Exelon Corporate recognized the following net pre-tax mark-to-market gains (losses) which are also recognized in Net fair value changes related to derivatives in Exelon's Consolidated Statements of Cash Flows. Exelon had no swaps for the three months ended March 31, 2022.
Gain (Loss)
Income Statement Location2023
Electric operating revenues$1 
Interest expense(1)
Total$— 
Cash collateral held with external counterparties [Table] The following table reflects the Registrants' cash collateral held with external counterparties, which is recorded in Other current liabilities on their respective Consolidated Balance Sheets, as of March 31, 2023 and December 31, 2022:
March 31, 2023December 31, 2022
Exelon$81 $297 
ComEd73 77 
BGE1 23 
PHI8 197 
Pepco1 26 
DPL1 121 
ACE6 50