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ALLOWANCES AND PROVISIONS - NON CURRENT AND CURRENT | 12 Months Ended
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Dec. 31, 2020
Provisions [abstract] |
ALLOWANCES AND PROVISIONS - NON CURRENT AND CURRENT | ALLOWANCES AND PROVISIONS – NON CURRENT AND CURRENT
Provisions and allowances - Non current |  | Liabilities |  | Liabilities |
|  | Legal claims and other matters |  | Asset retirement obligation |
Year ended December 31, 2020 |  |  |  |  |
Values at the beginning of the year |  | 613,352 |  |  | 26,556 |  |
Translation differences |  | (151,466) |  |  | (1,049) |  |
Additions |  | 3,760 |  |  | 16,166 |  |
Reversals |  | (384,933) |  |  | — |  |
Uses |  | (143) |  |  | — |  |
At December 31, 2020 |  | 80,570 |  |  | 41,673 |  |
Year ended December 31, 2019 |  |  |  |  |
Values at the beginning of the year |  | 643,950 |  |  | 24,554 |  |
Translation differences |  | (25,701) |  |  | 1,077 |  |
Additions |  | 2,689 |  |  | 925 |  |
Reversals |  | (4,417) |  |  | — |  |
Uses |  | (3,169) |  |  | — |  |
At December 31, 2019 |  | 613,352 |  |  | 26,556 |  |
18. ALLOWANCES AND PROVISIONS – NON CURRENT AND CURRENT (continued)
Provisions and allowances - Current |  | Deducted from assets |  | Liabilities
|  | Allowance for doubtful accounts |  | Obsolescence allowance |  | Asset retirement obligation
Year ended December 31, 2020 |  |  |  |  |  |
Values at the beginning of the year |  | 12,961 |  |  | 62,167 |  |  | 8,502 |
Translation differences |  | (1,789) |  |  | — |  |  | (1,241) |
Additions |  | 1,437 |  |  | 11,009 |  |  | 3,633 |
Reversals |  | (1,101) |  |  | (12,288) |  |  | — |
Uses |  | (1,008) |  |  | (2,278) |  |  | (6,379) |
At December 31, 2020 |  | 10,500 |  |  | 58,610 |  |  | 4,515 |
Year ended December 31, 2019 |  |  |  |  |  |
Values at the beginning of the year |  | 14,346 |  |  | 55,454 |  |  | 9,851 |
Translation differences |  | (285) |  |  | (458) |  |  | 348 |
Additions |  | 787 |  |  | 18,036 |  |  | 5,201 |
Reversals |  | (1,080) |  |  | (9,623) |  |  | — |
Uses |  | (807) |  |  | (1,242) |  |  | (6,898) |
At December 31, 2019 |  | 12,961 |  |  | 62,167 |  |  | 8,502 |

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- Definition The disclosure of provisions. [Refer: Provisions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 10 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_10_e&doctype=Standard -URIDate 2020-01-01 + Details
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