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Basis of Presentation Basis of Presentation (Tables) | 6 Months Ended
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Jun. 30, 2021
Accounting Policies [Abstract] |
Schedule of Changes in Allowances for Credit Losses | Changes in allowances for credit losses consisted of:
| Allowance for Trade Receivables |  | Allowance for Other Current Receivables |  | Allowance for Long-Term Receivables
| (in millions)
Balance at January 1, 2021 | $ | (42) |  |  | $ | (42) |  |  | $ | (12) |
Current period provision for expected credit losses | (3) |  |  | (11) |  |  | — |
Write-offs charged against the allowance | 1 |  |  | 1 |  |  | — |
Currency | 3 |  |  | (1) |  |  | — |
Balance at June 30, 2021 | $ | (41) |  |  | $ | (53) |  |  | $ | (12) |

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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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