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Credit Losses on Financial Instruments (Tables) | 9 Months Ended
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Sep. 30, 2023
Credit Loss [Abstract] |
Schedule of Financing Receivable, Allowance for Credit Loss | The following table presents the activity of our allowance for credit losses by accounts receivable portfolio for the nine months ended September 30, 2023:
| Business |  | Mass Markets |  | Total
| (Dollars in millions)
As of December 31, 2022(1) | $ | 57 |  |  | 28 |  |  | 85 |
Provision for expected losses | 27 |  |  | 50 |  |  | 77 |
Write-offs charged against the allowance | (37) |  |  | (51) |  |  | (88) |
Recoveries collected | 5 |  |  | 2 |  |  | 7 |
Change in allowance in assets held for sale | 1 |  |  | — |  |  | 1 |
Ending balance at September 30, 2023(1) | $ | 53 |  |  | 29 |  |  | 82 |
______________________________________________________________________ (1)As of September 30, 2023 and December 31, 2022, these amounts excluded $4 million and $5 million of allowance for credit losses classified as held for sale related to the EMEA business included in the Business portfolio. See Note 2—Planned Divestiture of the EMEA Business.

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