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ACCOUNTS RECEIVABLE
 3 Months Ended
Mar. 31, 2024
Receivables [Abstract]  
ACCOUNTS RECEIVABLE ACCOUNTS RECEIVABLE
The following table presents the components of Accounts Receivable on the Condensed Consolidated Balance Sheets:
(in millions)March 31, 2024December 31, 2023
Retail$89 $109 
Retail, Unbilled47 57 
Retail, Allowance for Credit Losses(11)(12)
Wholesale (1)
29 37 
Due from Affiliates (Note 5)
13 7 
Other26 19 
Accounts Receivable$193 $217 
(1)Includes $5 million as of March 31, 2024, and $10 million as of December 31, 2023, of receivables related to revenue from derivative instruments.
ALLOWANCE FOR CREDIT LOSSES
TEP separately evaluates retail, wholesale, and other accounts receivable for credit losses and has not recorded an allowance for credit losses for non-retail accounts receivable. The allowance is estimated based on historical collection patterns, sales, current conditions, and reasonable and supportable forecasts. The following table presents the change in the balance of Retail, Allowance for Credit Losses included in Accounts Receivable on the Condensed Consolidated Balance Sheets:
Three Months Ended March 31,
(in millions)20242023
Beginning of Period$(12)$(9)
Credit Loss Expense(1)(1)
Write-offs2 2 
End of Period$(11)$(8)