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Background of companies included in consolidation (Tables) | 12 Months Ended
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Dec. 31, 2017
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
|  | 12/31/2017 |  | 12/31/2016 |
|  | ThUS$ |  | ThUS$ |
Assets |  | 3,658,528 |  | 3,824,137 |
Liabilities |  | (1,470,707) |  | (1,578,063) |
Equity |  | 2,187,821 |  | 2,246,074 |
Disclosure of interests in joint arrangements [text block] | The Joint Action Agreement has only transformed the current controller of SQM S.A., composed of the Pampa Group, and the Kowa Group, into related parties of SQM S.A. Detail of effective concentration
Tax ID No. |  | Name |  | Ownership interest % |
96,511,530-7 |  | Sociedad de Inversiones Pampa Calichera S.A. |  | 19.72 |
96,863,960-9 |  | Inversiones Global Mining (Chile) Limitada |  | 3.34 |
79,798,650-k |  | Inversiones la Esperanza (Chile) Ltda. |  | 1.43 |
96,518,570-4 |  | Kochi S.A. |  | 0.30 |
Total Kowa Group |  |  |  | 2.12 |
Disclosure of Information attributable to non-controlling interests [Text Block] | 6.4 Information attributable to 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
|  |  | 12/31/2017 | 12/31/2016 |  | 12/31/2017 | 12/31/2016 |  | 12/31/2017 | 12/31/2016
|  |  | ThUS$ | ThUS$ |  | ThUS$ | ThUS$ |  | ThUS$ | ThUS$
Proinsa Ltda. | 0.1% |  | - | - |  | - | - |  | - | -
SQM Potasio S.A. | 0.0000001% |  | - | - |  | - | - |  | - | -
Ajay SQM Chile S.A. | 49% |  | (1,023) | 1,360 |  | 8,307 | 8,303 |  | 989 | 1,163
SQM Indonesia S.A. | 20% |  | - | - |  | 1 | 1 |  | - | -
Soquimich Comercial S.A. | 39.3616784% |  | (100) | 2,378 |  | 49,247 | 50,416 |  | 1,264 | 1,851
Comercial Agrorama Ltda. | 30% |  | 403 | (106) |  | (184) | 201 |  | - | -
Agrorama S.A. | 0.001% |  | - | - |  | - | - |  | - | -
Orcoma Estudios SPA | 49% |  | - | 2 |  | 2,277 | 2,277 |  | - | -
SQM (Thailand) Limited. | 0.004% |  | - | - |  | - | - |  | - | -
Total |  |  | (720) | 3,634 |  | 59,648 | 61,198 |  | 2,253 | 3,014

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- Definition The disclosure of interests in joint arrangements. A joint arrangement is an arrangement of which two or more parties have joint control. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2017-01-01 -Paragraph 2 -Subparagraph b -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2017-03-01&anchor=para_2_b_ii&doctype=Standard -URIDate 2017-03-09 + Details
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