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Receivables (Tables) | 12 Months Ended
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Dec. 31, 2022
Financing Receivable, Allowance for Credit Loss [Line Items] |
Rollforward of Allowance for Bad Debts | The table below presents a rollforward of our allowance for credit losses for 2020, 2021 and 2022.
| Millions of dollars | Balance at Beginning of Period | Provision (a) | Other (b) | Balance at End of Period (c)
| Year ended December 31, 2020 | $ | 776 |  | $ | 58 |  | $ | (10) |  | $ | 824 |
| Year ended December 31, 2021 | 824 | (19) | (51) |  | 754
| Year ended December 31, 2022 | 754 | 2 | (25) |  | 731
(a) | Represents increases to allowance for credit losses charged to costs and expenses, net of recoveries.
(b) | Includes write-offs, balance sheet reclassifications, and other activity.
(c) | The allowance for credit losses in all years is primarily comprised of a full reserve against accounts receivable with our primary customer in Venezuela.

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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