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Equipment Installment Plans (Tables)
12 Months Ended
Dec. 31, 2023
Receivables [Abstract]  
Equipment installment plan receivables
The following table summarizes equipment installment plan receivables.

December 31,20232022
(Dollars in millions)  
Equipment installment plan receivables, gross$1,151 $1,211 
Allowance for credit losses(90)(96)
Equipment installment plan receivables, net$1,061 $1,115 
Net balance presented in the Consolidated Balance Sheet as:
Accounts receivable — Customers and agents (Current portion)$577 $646 
Other assets and deferred charges (Non-current portion)484 469 
Equipment installment plan receivables, net$1,061 $1,115 
Equipment installment plan receivables credit categories
The balance and aging of the equipment installment plan receivables on a gross basis by credit category were as follows:
December 31, 2023December 31, 2022
Lowest RiskLower RiskSlight RiskHigher RiskTotalLowest RiskLower RiskSlight RiskHigher RiskTotal
(Dollars in millions)
Unbilled$977 $88 $16 $4 $1,085 $1,016 $98 $22 $$1,141 
Billed — current35 5 2 1 43 41 — 48 
Billed — past due12 7 3 1 23 13 22 
Total$1,024 $100 $21 $6 $1,151 $1,070 $109 $26 $$1,211 
The balance of the equipment installment plan receivables as of December 31, 2023 on a gross basis by year of origination were as follows:
202120222023Total
(Dollars in millions)
Lowest Risk$49 $404 $571 $1,024 
Lower Risk30 67 100 
Slight Risk— 17 21 
Higher Risk— 6 
Total$52 $439 $660 $1,151 
The write-offs, net of recoveries for the year ended December 31, 2023 on a gross basis by year of origination were as follows:
202120222023Total
(Dollars in millions)
Write-offs, net of recoveries
$13 $45 $17 $75 
Equipment installment plans allowance for credit losses
Activity for the years ended December 31, 2023 and 2022, in the allowance for credit losses for equipment installment plan receivables was as follows:
 20232022
(Dollars in millions)  
Allowance for credit losses, beginning of year$96 $72 
Bad debts expense69 100 
Write-offs, net of recoveries(75)(76)
Allowance for credit losses, end of year$90 $96