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Credit Losses on Financial Instruments (Tables) | 6 Months Ended
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Jun. 30, 2022
Credit Loss [Abstract] |
Financing Receivable, Allowance for Credit Loss | The following table presents the activity of our allowance for credit losses by accounts receivable portfolio for the six months ended June 30, 2022:
| Business |  | Mass Markets |  | Total
| (Dollars in millions)
As of December 31, 2021(1) | $ | 88 |  |  | 26 |  |  | 114 |
Provision for expected losses | 19 |  |  | 37 |  |  | 56 |
Write-offs charged against the allowance | (32) |  |  | (49) |  |  | (81) |
Recoveries collected | 8 |  |  | 1 |  |  | 9 |
Change in allowance in assets held for sale | — |  |  | 5 |  |  | 5 |
Ending balance at June 30, 2022(1) | $ | 83 |  |  | 20 |  |  | 103 |
______________________________________________________________________ (1)As of June 30, 2022 and December 31, 2021, these amounts exclude allowance for credit losses classified as held for sale of $19 million and $24 million, respectively. See Note 2—Recently Completed Divestiture of the Latin American Business and Planned Divestiture of ILEC Business.

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