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v3.19.1

Background of companies included in consolidation (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of Background of companies included in consolidation [Abstract] |
Disclosure of Parent's stand-alone assets and liabilities [Text Block] |
| 6.1 | Parent’s stand-alone assets and liabilities
|  | 12/31/2018 |  |  | 12/31/2017 |
|  | ThUS$ |  |  | ThUS$ |
Assets |  |  | 3,737,892 |  |  |  | 3,658,528 |
Liabilities |  |  | (1,652,401 | ) |  |  | (1,470,707 | )
Equity |  |  | 2,085,491 |  |  |  | 2,187,821 |
Disclosure of Information attributable to non-controlling interests [Text Block] |
| 6.3 | Background on non-controlling interests
Subsidiary |  | % of interests in the ownership held by non-controlling interests, |  |  | Profit (loss) attributable to non- controlling interests |  |  | Equity, non-controlling interests |  |  | Dividends paid to non- controlling interests |
|  |  |  |  | 12/31/2018 |  |  | 12/31/2017 |  |  | 12/31/2018 |  |  | 12/31/2017 |  |  | 12/31/2018 |  |  | 12/31/2017 |
|  |  |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Proinsa Ltda. |  |  | 0.1 | % |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
SQM Potasio S.A. |  |  | 0.0000001 | % |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Ajay SQM Chile S.A. |  |  | 49 | % |  |  | 1,176 |  |  |  | 1,023 |  |  |  | 8,659 |  |  |  | 8,306 |  |  |  | 823 |  |  |  | 989 |
SQM Indonesia S.A. |  |  | 20 | % |  |  | - |  |  |  | - |  |  |  | 1 |  |  |  | 1 |  |  |  | - |  |  |  | - |
Soquimich Comercial S.A. |  |  | 39.3616784 | % |  |  | 1,375 |  |  |  | 100 |  |  |  | 41,855 |  |  |  | 49,247 |  |  |  | 8,910 |  |  |  | 1,264 |
Comercial Agrorama Ltda. |  |  | 30 | % |  |  | (318 | ) |  |  | (403 | ) |  |  | (481 | ) |  |  | (184 | ) |  |  | - |  |  |  | - |
Agrorama S.A. |  |  | 0.001 | % |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Orcoma Estudios SPA |  |  | 49 | % |  |  | - |  |  |  | - |  |  |  | 2,277 |  |  |  | 2,277 |  |  |  | - |  |  |  | - |
SQM (Thailand) Limited. |  |  | 0.004 | % |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Total |  |  |  |  |  |  | 2,233 |  |  |  | 720 |  |  |  | 52,311 |  |  |  | 59,647 |  |  |  | 9,733 |  |  |  | 2,253 |

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