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Identification and Activities of the Company and Subsidiaries (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure of Identification and Activities of the Company and Subsidiaries [Abstract] |
Disclosure of information about employees [text block] | As of December 31, 2017, and December 31, 2016, the workforce was as follows:
|  | 12/31/2017 |  | 12/31/2016 |
Employees |  | SQM S.A |  | Other subsidiaries |  | Total |  | SQM S.A. |  | Other subsidiaries |  | Total |
Executives |  | 43 |  | 77 |  | 120 |  | 31 |  | 72 |  | 103 |
Professionals |  | 143 |  | 942 |  | 1,085 |  | 119 |  | 919 |  | 1,038 |
Technicians and operators |  | 248 |  | 3,177 |  | 3,425 |  | 262 |  | 3,076 |  | 3,338 |
Foreign employees |  | 19 |  | 272 |  | 291 |  | 8 |  | 264 |  | 272 |
Overall total |  | 453 |  | 4,468 |  | 4,921 |  | 420 |  | 4,331 |  | 4,751 |
Schedule of Shareholders stock and Ownership Percentage [Text Block] | The information below is taken from our records and reports controlled in the Central Securities Depository and reported to the Financial Markets Commission (CMF), which was formerly the Superintendence of Securities and Insurance (SVS) and the Chilean Stock Exchange, whose main shareholders are as follows:
Shareholder as of December 31, 2017 |  | No. of Series A with ownership |  |  | % of Series A shares |  |  | No. of Series B with ownership |  |  | % of Series B shares |  | % of total shares |
The Bank of New York Mellon, ADRs |  | - |  |  | - |  |  |  | 54,599,961 |  |  | 45.36 | % |  | 20.74 | %
Sociedad de Inversiones Pampa Calichera S.A.(*) |  | 44,894,152 |  |  | 31.43 | % |  |  | 7,007,688 |  |  | 5.82 | % |  | 19.72 | %
Inversiones El Boldo Limitada |  | 29,330,326 |  |  | 20.54 | % |  |  | 16,363,546 |  |  | 13.59 | % |  | 17.36 | %
Inversiones RAC Chile Limitada |  | 19,200,242 |  |  | 13.44 | % |  |  | 2,202,773 |  |  | 1.83 | % |  | 8.13 | %
Potasios de Chile S.A.(*) |  | 18,179,147 |  |  | 12.73 | % |  |  | - |  |  | - |  |  | 6.91 | %
Inversiones PCS Chile Limitada |  | 15,526,000 |  |  | 10.87 | % |  |  | 1,600,000 |  |  | 1.33 | % |  | 6.51 | %
Inversiones Global Mining (Chile) Limitada (*) |  | 8,798,539 |  |  | 6.16 | % |  |  | - |  |  | - |  |  | 3.34 | %
Banco de Chile por Cuenta de Terceros no Residentes |  | - |  |  | - |  |  |  | 8,394,289 |  |  | 6.97 | % |  | 3.19 | %
Banco Itau por Cuenta de Inversionistas |  | 19,125 |  |  | 0.01 | % |  |  | 7,017,504 |  |  | 5.63 | % |  | 2.67 | %
Banco Santander por cuenta de inversionistas extranjeros |  | - |  |  | - |  |  |  | 4,593,336 |  |  | 3.82 |  |  | 1.75 | %
(*) Total Pampa Group 29.97 %
Shareholder as of December 31, 2016 |  | No. of Series A with ownership |  | % of Series A shares |  |  | No. of Series B with ownership |  | % of Series B shares |  |  | % of total shares |
The Bank of New York Mellon, ADRs |  | - |  | - |  |  | 59,373,011 |  | 49.32 | % |  |  | 22.56 | %
Sociedad de Inversiones Pampa Calichera S.A.(*) |  | 44,894,152 |  | 31.43 | % |  | 7,007,688 |  | 5.82 | % |  |  | 19.72 | %
Inversiones El Boldo Limitada |  | 29,330,326 |  | 20.54 | % |  | 16,363,546 |  | 13.59 | % |  |  | 17.36 | %
Inversiones RAC Chile Limitada |  | 19,200,242 |  | 13.44 | % |  | 2,202,773 |  | 1.83 | % |  |  | 8.13 | %
Potasios de Chile S.A.(*) |  | 18,179,147 |  | 12.73 | % |  | - |  | - |  |  |  | 6.91 | %
Inversiones PCS Chile Limitada |  | 15,526,000 |  | 10.87 | % |  | 1,600,000 |  | 1.33 | % |  |  | 6.51 | %
Banco de Chile on behalf of non-resident third parties |  | - |  | - |  |  | 8,962,355 |  | 7.45 | % |  |  | 3.41 | %
Inversiones Global Mining (Chile) Limitada (*) |  | 8,798,539 |  | 6.16 | % |  | - |  | - |  |  |  | 3.34 | %
Banco Itaú on behalf of investors |  | 20,950 |  | 0.01 | % |  | 6,502,217 |  | 5.40 | % |  |  | 2.48 | %
Inversiones La Esperanza Limitada |  | 3,711,598 |  | 2.60 | % |  | 46,500 |  | 0.04 | % |  |  | 1.43 | %
(*) Total Pampa Group 29.97 %

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