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v3.20.1

Contingencies and restrictions (Tables) | 12 Months Ended
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Dec. 31, 2019
Disclosure of contingent liability [Abstract] |
Disclosure of detailed information about financial indicators [Text Block] | As of December 31, 2019, the above-mentioned financial indicator has the following values:
Indicator |  | As of December ‎ 31, 2019 |  |  | As of December ‎ 31, 2018 |
Leverage |  |  | 1.19 |  |  |  | 1.00 |
Disclosure of detailed information about grantor obligations [Text Block] |
Grantor |  | Relationship |  |  | As of December ‎ 31, 2019 |  |  | As of December ‎ 31, 2019 |
|  |  |  |  | ThUS$ |  |  | ThUS$ |
Ferosor Agrícola S.A. |  | Unrelated Third party |  |  |  | 5,372 |  |  |  | 3,598 |
Tattersall Agroinsumos S.A. |  | Unrelated Third party |  |  |  | 2,000 |  |  |  | 2,000 |
Contador Frutos S.A. |  | Unrelated Third party |  |  |  | - |  |  |  | 1,587 |
Covepa SPA |  | Unrelated Third party |  |  |  | 671 |  |  |  | 720 |
Johannes Epple Davanzo |  | Unrelated Third party |  |  |  | 300 |  |  |  | 321 |
Hortofrutícola La Serena |  | Unrelated Third party |  |  |  | 282 |  |  |  | 294 |
Com. Serv Johannes Epple Davanz |  | Unrelated Third party |  |  |  | 269 |  |  |  | - |
Juan Luis Gaete Chesta |  | Unrelated Third party |  |  |  | 182 |  |  |  | 195 |
Arena Fertilizantes y Semillas |  | Unrelated Third party |  |  |  | 201 |  |  |  | 216 |
Vicente Oyarce Castro |  | Unrelated Third party |  |  |  | 213 |  |  |  | 222 |
Soc. Agrocom. Julio Polanco |  | Unrelated Third party |  |  |  | - |  |  |  | 144 |
Bernardo Guzmán Schmidt |  | Unrelated Third party |  |  |  | 121 |  |  |  | 126 |
Total |  |  |  | 9,611 |  |  |  | 9,423 |
Disclosure of detailed information about guarantees in which there is no pending balance [Text Block] | Guarantees without pending balance indirectly reflect that the respective guarantees are in force and approved by the Company’s Board of Directors and have not been used by the respective subsidiary.
|  | Debtor |  |  |  |  |  | Outstanding balances as of the closing date ‎of the financial statements |
Creditor of the guarantee |  | Name |  |  | Relationship |  |  | Type of guarantee |  |  | As of December 31, ‎2019 |  |  | As of December 31, ‎2018 |
|  |  |  |  |  |  |  |  |  |  | ThUS$ |  |  | ThUS$ |
Australian and New Zealand Bank |  | SQM North America Corp |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
Australian and New Zealand Bank |  | SQM Europe N.V. |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
Generale Bank |  | SQM North America Corp |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
Generale Bank |  | SQM Europe N.V. |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
Kredietbank |  | SQM North America Corp |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
Kredietbank |  | SQM Europe N.V. |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
Bancos e Instituciones Financieras |  | SQM Investment Corp. N.V. |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
Bancos e Instituciones Financieras |  | SQM Europe N.V. |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
Bancos e Instituciones Financieras |  | SQM North America Corp |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
Bancos e Instituciones Financieras |  | Nitratos Naturais do Chile Ltda. |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
Bancos e Instituciones Financieras |  | SQM México S.A. de C.V. |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
Bancos e Instituciones Financieras |  | SQM Brasil Ltda. |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
“BNP’’ |  | SQM Investment Corp. N.V. |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
Sociedad Nacional de Minería A.G. |  | SQM Potasio S.A. |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
Scotiabank & Trust (Cayman) Ltd. |  | Royal Seed Trading A.V.V. |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
Scotiabank & Trust (Cayman) Ltd. |  | Royal Seed Trading A.V.V. |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
Bank of America |  | Royal Seed Trading A.V.V. |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
Export Development Canada |  | Royal Seed Trading A.V.V. |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
The Bank of Tokyo-Mitsubishi UFJ Ltd. |  | Royal Seed Trading A.V.V. |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
JP Morgan Chase Bank |  | SQM Industrial S.A. |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
The Bank of Nova Scotia |  | SQM Investment Corp. N.V. |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
Morgan Stanley Capital Services |  | SQM Investment Corp. N.V. |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
The Bank of Tokyo-Mitsubishi UFJ Ltd |  | SQM Investment Corp. N.V. |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
HSBC |  | SQM Investment Corp. N.V. |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
Deutsche Bank AG |  | SQM Investment Corp. N.V. |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |
Credit Suisse International |  | SQM Investment Corp. N.V. |  |  | Subsidiary |  |  | Guarantee |  |  |  | - |  |  |  | - |

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