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Intangible assets and goodwill (Tables) | 12 Months Ended
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Dec. 31, 2020
Disclosure Of Intangible Assets And Goodwill [Abstract] |
Disclosure of detailed information about intangible assets and goodwill explanatory [Text Block] |
As of December 31, 2020
Intangible assets and goodwill |  | Useful life |  | Net Value |
|  |  |  | ThUS$ |
IT programs |  | Finite |  |  | 4,826 |
Mining rights |  | Finite |  |  | 150,046 |
Water rights and rights of way. |  | Indefinite |  |  | 23,343 |
Customer-related intangible assets |  | Finite |  |  | - |
Other intangible assets |  | Finite |  |  | 192 |
Intangible assets other than goodwill |  |  |  |  | 178,407 |
Goodwill |  | Indefinite |  |  | 41,966 |
Total Intangible Asset |  |  |  |  | 220,373 |
As of December 31, 2019
Intangible assets and goodwill |  | Useful life |  | Net value |
|  |  |  | ThUS$ |
IT programs |  | Finite |  |  | 6,011 |
Mining rights |  | Finite |  |  | 157,570 |
Water rights and rights of way. |  | Indefinite |  |  | 23,342 |
Customer-related intangible assets |  | Finite |  |  | 1,273 |
Other intangible assets. |  | Finite |  |  | 162 |
Intangible assets other than goodwill |  |  |  |  | 188,358 |
Goodwill |  | Indefinite |  |  | 34,726 |
Total Intangible Assets |  |  |  |  | 223,084 |
Disclosure of reconciliation of changes in intangible assets and goodwill [text block] |
| a) | Movements in identifiable intangible assets as of December 31, 2020:
Gross Value Movements in identifiable intangible assets |  | IT programs |  |  | Mining rights, Finite |  |  | Water rights, and rights of way, Indefinite |  |  | Customer-related intangible assets |  |  | Other intangible assets |  |  | Goodwill |  |  | Identifiable intangible assets |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Opening Balance |  |  | 34,471 |  |  |  | 158,337 |  |  |  | 25,423 |  |  |  | 1,778 |  |  |  | 2,188 |  |  |  | 38,120 |  |  |  | 260,317 |
Additions |  |  | 508 |  |  |  | 2,295 |  |  |  | - |  |  |  | - |  |  |  | 72 |  |  |  | 7,380 |  |  |  | 10,255 |
Other increases / decreases for foreign currency exchange rates |  |  | 5 |  |  |  | - |  |  |  | 1 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 6 |
Decreases through sale |  |  | - |  |  |  | (136 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (136 | )
Other increases (decreases) |  |  | 297 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 14 |  |  |  | - |  |  |  | 311 |
Total increases (decreases) |  |  | 810 |  |  |  | 2,159 |  |  |  | 1 |  |  |  | - |  |  |  | 86 |  |  |  | 7,380 |  |  |  | 10,436 |
Closing balance |  |  | 35,281 |  |  |  | 160,496 |  |  |  | 25,424 |  |  |  | 1,778 |  |  |  | 2,274 |  |  |  | 45,500 |  |  |  | 270,753 |
Accumulated amortization and impairment Movements in identifiable intangible assets |  | IT programs |  |  | Mining rights, Finite |  |  | Water rights, and rights of way, Indefinite |  |  | Customer-related intangible assets |  |  | Other intangible assets |  |  | Goodwill |  |  | Identifiable intangible assets |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Opening Balance |  |  | (28,460 | ) |  |  | (767 | ) |  |  | (2,081 | ) |  |  | (505 | ) |  |  | (2,026 | ) |  |  | (3,394 | ) |  |  | (37,233 | )
Other increases / decreases for foreign currency exchange rates |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Other increases (decreases) |  |  | - |  |  |  | (2 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (2 | )
Impairment losses recognized in profit for the year |  |  | (14 | ) |  |  | (654 | ) |  |  | - |  |  |  | (990 | ) |  |  | - |  |  |  | (140 | ) |  |  | (1,798 | )
Amortization |  |  | (1,981 | ) |  |  | (9,027 | ) |  |  | - |  |  |  | (283 | ) |  |  | (56 | ) |  |  | - |  |  |  | (11,347 | )
Total increases (decreases) |  |  | (1,995 | ) |  |  | (9,683 | ) |  |  | - |  |  |  | (1,273 | ) |  |  | (56 | ) |  |  | (140 | ) |  |  | (13,147 | )
Closing balance |  |  | (30,455 | ) |  |  | (10,450 | ) |  |  | (2,081 | ) |  |  | (1,778 | ) |  |  | (2,082 | ) |  |  | (3,534 | ) |  |  | (50,380 | )
Net value Movements in Identifiable intangible assets |  | IT programs |  |  | Mining rights, Finite |  |  | Water rights, and rights of way, Indefinite |  |  | Customer-related intangible assets |  |  | Other intangible assets |  |  | Goodwill |  |  | Identifiable intangible assets |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Opening Balance |  |  | 6,011 |  |  |  | 157,570 |  |  |  | 23,342 |  |  |  | 1,273 |  |  |  | 162 |  |  |  | 34,726 |  |  |  | 223,084 |
Additions |  |  | 508 |  |  |  | 2,295 |  |  |  | - |  |  |  | - |  |  |  | 72 |  |  |  | 7,380 |  |  |  | 10,255 |
Amortization |  |  | (1,981 | ) |  |  | (9,027 | ) |  |  | - |  |  |  | (283 | ) |  |  | (56 | ) |  |  | - |  |  |  | (11,347 | )
Impairment losses recognized in profit for the year |  |  | (14 | ) |  |  | (654 | ) |  |  | - |  |  |  | (990 | ) |  |  | - |  |  |  | (140 | ) |  |  | (1,798 | )
Other increases / decreases for foreign currency exchange rates |  |  | 5 |  |  |  | - |  |  |  | 1 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 6 |
Decreases through sale |  |  | - |  |  |  | (136 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (136 | )
Other increases (decreases) |  |  | 297 |  |  |  | (2 | ) |  |  | - |  |  |  | - |  |  |  | 14 |  |  |  | - |  |  |  | 309 |
Total increases (decreases) |  |  | (1,185 | ) |  |  | (7,524 | ) |  |  | 1 |  |  |  | (1,273 | ) |  |  | 30 |  |  |  | 7,240 |  |  |  | (2,711 | )
Closing balance |  |  | 4,826 |  |  |  | 150,046 |  |  |  | 23,343 |  |  |  | - |  |  |  | 192 |  |  |  | 41,966 |  |  |  | 220,373 |
Movements in identifiable intangible assets as of December 31, 2019:
Gross Value Movements in identifiable intangible assets |  | IT programs |  |  | Mining rights, Finite |  |  | Water rights, and rights of way, Indefinite |  |  | Customer-related intangible assets |  |  | Other intangible assets |  |  | Goodwill |  |  | Identifiable intangible assets |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Opening Balance |  |  | 29,137 |  |  |  | 159,424 |  |  |  | 25,425 |  |  |  | 1,778 |  |  |  | 2,165 |  |  |  | 38,120 |  |  |  | 256,049 |
Additions |  |  | 2,606 |  |  |  | 227 |  |  |  | - |  |  |  | - |  |  |  | 23 |  |  |  | - |  |  |  | 2,856 |
Other increases / decreases of foreign currency |  |  | (7 | ) |  |  | - |  |  |  | (2 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (9 | )
Decreases through sale |  |  | - |  |  |  | (1,314 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (1,314 | )
Other increases (decreases) |  |  | 2,735 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 2,735 |
Total increases (decreases) |  |  | 5,334 |  |  |  | (1,087 | ) |  |  | (2 | ) |  |  | - |  |  |  | 23 |  |  |  | - |  |  |  | 4,268 |
Closing balance |  |  | 34,471 |  |  |  | 158,337 |  |  |  | 25,423 |  |  |  | 1,778 |  |  |  | 2,188 |  |  |  | 38,120 |  |  |  | 260,317 |
Accumulated amortization and impairment Movements in identifiable intangible assets |  | IT programs |  |  | Mining rights, Finite |  |  | Water rights, and rights of way, Indefinite |  |  | Customer-related intangible assets |  |  | Other intangible assets |  |  | Goodwill |  |  | Identifiable intangible assets |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Opening Balance |  |  | (24,569 | ) |  |  | (168 | ) |  |  | (1,649 | ) |  |  | (205 | ) |  |  | (1,988 | ) |  |  | (3,254 | ) |  |  | (31,833 | )
Other increases / decreases of foreign currency |  |  | 3 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 3 |
Other increases (decreases) |  |  | (256 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (256 | )
Impairment losses recognized in profit for the year |  |  | - |  |  |  | (481 | ) |  |  | (432 | ) |  |  | - |  |  |  | - |  |  |  | (140 | ) |  |  | (1,053 | )
Amortization |  |  | (3,638 | ) |  |  | (118 | ) |  |  | - |  |  |  | (300 | ) |  |  | (38 | ) |  |  | - |  |  |  | (4,094 | )
Total increases (decreases) |  |  | (3,891 | ) |  |  | (599 | ) |  |  | (432 | ) |  |  | (300 | ) |  |  | (38 | ) |  |  | (140 | ) |  |  | (5,400 | )
Closing balance |  |  | (28,460 | ) |  |  | (767 | ) |  |  | (2,081 | ) |  |  | (505 | ) |  |  | (2,026 | ) |  |  | (3,394 | ) |  |  | (37,233 | )
Net value Movements in Identifiable intangible assets |  | IT programs |  |  | Mining rights, Finite |  |  | Water rights, and rights of way, Indefinite |  |  | Customer-related intangible assets |  |  | Other intangible assets |  |  | Goodwill |  |  | Identifiable intangible assets |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Opening Balance |  |  | 4,568 |  |  |  | 159,256 |  |  |  | 23,776 |  |  |  | 1,573 |  |  |  | 177 |  |  |  | 34,866 |  |  |  | 224,216 |
Additions |  |  | 2,606 |  |  |  | 227 |  |  |  | - |  |  |  | - |  |  |  | 23 |  |  |  | - |  |  |  | 2,856 |
Amortization |  |  | (3,638 | ) |  |  | (118 | ) |  |  | - |  |  |  | (300 | ) |  |  | (38 | ) |  |  | - |  |  |  | (4,094 | )
Impairment losses recognized in profit or loss for the year |  |  | - |  |  |  | (481 | ) |  |  | (432 | ) |  |  | - |  |  |  | - |  |  |  | (140 | ) |  |  | (1,053 | )
Other increases / decreases of foreign currency |  |  | (4 | ) |  |  | - |  |  |  | (2 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (6 | )
Decreases through sale |  |  | - |  |  |  | (1,314 | ) |  |  |  |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (1,314 | )
Other increases (decreases) |  |  | 2,479 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 2,479 |
Total increases (decreases) |  |  | 1,443 |  |  |  | (1,686 | ) |  |  | (434 | ) |  |  | (300 | ) |  |  | (15 | ) |  |  | (140 | ) |  |  | (1,132 | )
Closing balance |  |  | 6,011 |  |  |  | 157,570 |  |  |  | 23,342 |  |  |  | 1,273 |  |  |  | 162 |  |  |  | 34,726 |  |  |  | 223,084 |
Disclosure of reconciliation of changes in goodwill |
| (b) | Movements in identifiable goodwill as of December 31, 2020 :
Gross Value Movements in identifiable goodwill |  | Goodwill at the start of the period January 01, 2020 |  |  | Additional recognition |  |  | Impairment losses recognized in profit or loss for the year (-) |  |  | Total increase (decrease) |  |  | Goodwill at end of period |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
SQM Industrial S.A. |  |  | 3,214 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 3,214 |
SQM S.A. |  |  | 22,255 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 22,255 |
SQM Iberian S.A. |  |  | 148 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 148 |
SQM Investment Corporation |  |  | 86 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 86 |
Soquimich Comercial S.A. |  |  | 320 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 320 |
Soquimich European Holding B.V. |  |  | 11,373 |  |  |  | 10 |  |  |  | - |  |  |  | 10 |  |  |  | 11,383 |
SQM Holland B.V. |  |  | - |  |  |  | 7,370 |  |  |  | - |  |  |  | 7,370 |  |  |  | 7,370 |
SQM Potasio S.A. |  |  | 724 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 724 |
Total increases (decreases) |  |  | 38,120 |  |  |  | 7,380 |  |  |  | - |  |  |  | 7,380 |  |  |  | 45,500 |
Closing balance |  |  | 38,120 |  |  |  | 7,380 |  |  |  | - |  |  |  | 7,380 |  |  |  | 45,500 |
Accumulated impairment Movements in identifiable goodwill |  | Goodwill at the start of the period January 01, 2020 |  |  | Additional recognition |  |  | Impairment losses recognized in profit or loss for the year (-) |  |  | Total increase (decrease) |  |  | Goodwill at end of period |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
SQM Industrial S.A. |  |  | (3,214 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (3,214 | )
SQM S.A. |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
SQM Iberian S.A. |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
SQM Investment Corporation |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Soquimich Comercial S.A. |  |  | (180 | ) |  |  | - |  |  |  | (140 | ) |  |  | (140 | ) |  |  | (320 | )
Soquimich European Holding B.V. |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
SQM Holland B.V. |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
SQM Potasio S.A. |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Total increases (decreases) |  |  | (3,394 | ) |  |  | - |  |  |  | (140 | ) |  |  | (140 | ) |  |  | (3,534 | )
Closing balance |  |  | (3,394 | ) |  |  | - |  |  |  | (140 | ) |  |  | (140 | ) |  |  | (3,534 | )
Net Value Movements in identifiable goodwill |  | Goodwill at the start of the period January 01, 2020 |  |  | Additional recognition |  |  | Impairment losses recognized in profit or loss for the year (-) |  |  | Total increase (decrease) |  |  | Goodwill at end of period |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
SQM Industrial S.A. |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
SQM S.A. |  |  | 22,255 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 22,255 |
SQM Iberian S.A. |  |  | 148 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 148 |
SQM Investment Corporation |  |  | 86 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 86 |
Soquimich Comercial S.A. |  |  | 140 |  |  |  | - |  |  |  | (140 | ) |  |  | (140 | ) |  |  | - |
Soquimich European Holding B.V. |  |  | 11,373 |  |  |  | 10 |  |  |  | - |  |  |  | 10 |  |  |  | 11,383 |
SQM Holland B.V. |  |  | - |  |  |  | 7,370 |  |  |  | - |  |  |  | 7,370 |  |  |  | 7,370 |
SQM Potasio S.A. |  |  | 724 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 724 |
Total increases (decreases) |  |  | 34,726 |  |  |  | 7,380 |  |  |  | (140 | ) |  |  | 7,240 |  |  |  | 41,966 |
Closing balance |  |  | 34,726 |  |  |  | 7,380 |  |  |  | (140 | ) |  |  | 7,240 |  |  |  | 41,966 |
Movements in identifiable goodwill as of December 31, 2019
Gross Value Movements in identifiable goodwill |  | Goodwill at the start of the period January 01, 2019 |  |  | Additional recognition |  |  | Impairment losses recognized in profit or loss for the year (-) |  |  | Total increase (decrease) |  |  | Goodwill at end of period |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
SQM Industrial S.A. |  |  | 3,214 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 3,214 |
SQM S.A. |  |  | 22,255 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 22,255 |
SQM Iberian S.A. |  |  | 148 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 148 |
SQM Investment Corporation |  |  | 86 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 86 |
Soquimich Comercial S.A. |  |  | 320 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 320 |
Soquimich European Holding B.V. |  |  | 11,373 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 11,373 |
SQM Potasio S.A. |  |  | 724 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 724 |
Total increases (decreases) |  |  | 38,120 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 38,120 |
Closing balance |  |  | 38,120 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 38,120 |
Accumulated impairment Movements in identifiable goodwill |  | Goodwill at the start of the period January 01, 2019 |  |  | Additional recognition |  |  | Impairment losses recognized in profit or loss for the year (-) |  |  | Total increase (decrease) |  |  | Goodwill at end of period |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
SQM Industrial S.A. |  |  | (3,214 | ) |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (3,214 | )
SQM S.A. |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
SQM Iberian S.A. |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
SQM Investment Corporation |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Soquimich Comercial S.A. |  |  | (40 | ) |  |  | - |  |  |  | (140 | ) |  |  | (140 | ) |  |  | (180 | )
Soquimich European Holding B.V. |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
SQM Potasio S.A. |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Total increases (decreases) |  |  | (3,254 | ) |  |  | - |  |  |  | (140 | ) |  |  | (140 | ) |  |  | (3,394 | )
Closing balance |  |  | (3,254 | ) |  |  | - |  |  |  | (140 | ) |  |  | (140 | ) |  |  | (3,394 | )
Net Value Movements in identifiable goodwill |  | Goodwill at the start of the period January 01, 2019 |  |  | Additional recognition |  |  | Impairment losses recognized in profit or loss for the year (-) |  |  | Total increase (decrease) |  |  | Goodwill at end of period |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
SQM Industrial S.A. |  | - |  |  | - |  |  | - |  |  | - |  |  | - |
SQM S.A. |  |  | 22,255 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 22,255 |
SQM Iberian S.A. |  |  | 148 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 148 |
SQM Investment Corporation |  |  | 86 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 86 |
Soquimich Comercial S.A. |  |  | 280 |  |  |  | - |  |  |  | (140 | ) |  |  | (140 | ) |  |  | 140 |
Soquimich European Holding B.V. |  |  | 11,373 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 11,373 |
SQM Potasio S.A. |  |  | 724 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 724 |
Total increases (decreases) |  |  | 34,866 |  |  |  | - |  |  |  | (140 | ) |  |  | (140 | ) |  |  | 34,726 |
Closing balance |  |  | 34,866 |  |  |  | - |  |  |  | (140 | ) |  |  | (140 | ) |  |  | 34,726 |

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