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Provision for de-characterization of dam structures and asset retirement obligations (Tables) | 12 Months Ended
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Dec. 31, 2022
Provision For De-characterization Of Dam Structures And Asset Retirement Obligations |
Schedule of changes in the provisions, de-characterization of dam structures located in Brazil |
Schedule of changes in the provisions, de-characterization of dam structures located in Brazil |  |  |  |
|  | 2022 |  | 2021
Balance at January 1, |  | 3,523 |  | 2,289
Additional provision |  | 72 |  | 1,725
Disbursements |  | (349) |  | (338)
Present value valuation |  | (121) |  | (36)
Translation adjustment |  | 253 |  | (117)
Balance at December 31, |  | 3,378 |  | 3,523
Current liabilities |  | 357 |  | 451
Non-current liabilities |  | 3,021 |  | 3,072
Liabilities |  | 3,378 |  | 3,523
Schedule of changes in the provision of asset retirement obligations and environmental obligations |
Schedule of changes in the provision of asset retirement obligations and environmental obligations |  |  |  |  |  |  |  |
|  | Liability |  | Discount rate |  | Cash flow maturity
|  | December 31, 2022 |  | December 31, 2021 | December 31, 2022 | December 31, 2021 | December 31, 2022 | December 31, 2021
Liability by geographical area |  |  |  |  |  |  |  |
Brazil |  | 1,788 |  | 1,398 | 6.20% | 5.48% | 2096 | 2119
Canada |  | 1,683 |  | 2,727 | 1.11% | 0.00% | 2148 | 2151
Oman |  | 114 |  | 123 | 3.90% | 3.03% | 2035 | 2035
Indonesia |  | 73 |  | 77 | 4.33% | 4.20% | 2061 | 2061
Other regions |  | 145 |  | 255 | 1.84% - 2.00% | 0.00% – 0.57% |  |
|  | 3,803 |  | 4,580 |  |  |  |
Provision changes during the year
Provision changes during |  |  |  |  |  |  |  |  |  |  |
| 2022 |  | 2021
| Asset retirement obligations |  | Environmental obligations |  | Total |  | Asset retirement obligations |  | Environmental obligations |  | Total
Balance at January 1, | 4,283 |  | 297 |  | 4,580 |  | 4,220 |  | 302 |  | 4,522
Adjustment to present value | 20 |  | 7 |  | 27 |  | 110 |  | 19 |  | 129
Disbursements | (101) |  | (26) |  | (127) |  | (88) |  | (57) |  | (145)
Revisions on projected cash flows (i) | (646) |  | 46 |  | (600) |  | 178 |  | 49 |  | 227
Transfer to assets held for sale | (49) |  | (2) |  | (51) |  | (50) |  | - |  | (50)
Translation adjustment | (41) |  | 15 |  | (26) |  | (87) |  | (16) |  | (103)
Balance at December, 31 | 3,466 |  | 337 |  | 3,803 |  | 4,283 |  | 297 |  | 4,580
Current | 210 |  | 94 |  | 304 |  | 72 |  | 98 |  | 170
Non-current | 3,256 |  | 243 |  | 3,499 |  | 4,211 |  | 199 |  | 4,410
Liability | 3,466 |  | 337 |  | 3,803 |  | 4,283 |  | 297 |  | 4,580
(i) | Among other factors, includes the reduction in liability of US$870, due to the update in the discount rate of the asset retirement obligation in Canada, which increased from 0.00% to 1.11% for the year ended December 31, 2022.
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Provision changes during |  |  |  |  |  |  |  |  |  |  |
| 2022 |  | 2021
| Asset retirement obligations |  | Environmental obligations |  | Total |  | Asset retirement obligations |  | Environmental obligations |  | Total
Balance at January 1, | 4,283 |  | 297 |  | 4,580 |  | 4,220 |  | 302 |  | 4,522
Adjustment to present value | 20 |  | 7 |  | 27 |  | 110 |  | 19 |  | 129
Disbursements | (101) |  | (26) |  | (127) |  | (88) |  | (57) |  | (145)
Revisions on projected cash flows (i) | (646) |  | 46 |  | (600) |  | 178 |  | 49 |  | 227
Transfer to assets held for sale | (49) |  | (2) |  | (51) |  | (50) |  | - |  | (50)
Translation adjustment | (41) |  | 15 |  | (26) |  | (87) |  | (16) |  | (103)
Balance at December, 31 | 3,466 |  | 337 |  | 3,803 |  | 4,283 |  | 297 |  | 4,580
Current | 210 |  | 94 |  | 304 |  | 72 |  | 98 |  | 170
Non-current | 3,256 |  | 243 |  | 3,499 |  | 4,211 |  | 199 |  | 4,410
Liability | 3,466 |  | 337 |  | 3,803 |  | 4,283 |  | 297 |  | 4,580
(i) | Among other factors, includes the reduction in liability of US$870, due to the update in the discount rate of the asset retirement obligation in Canada, which increased from 0.00% to 1.11% for the year ended December 31, 2022.

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