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v3.19.1

Identification and Activities of the Company and Subsidiaries (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of Identification and Activities of the Company and Subsidiaries [Abstract] |
Disclosure of information about employees [text block] | As of December 31, 2018, and December 31, 2017, the workforce was as follows:
|  | 12/31/2018 |  |  | 12/31/2017 |
Employees |  | SQM S.A. |  |  | Other subsidiaries |  |  | Total |  |  | SQM S.A. |  |  | Other subsidiaries |  |  | Total |
Executives |  |  | 33 |  |  |  | 89 |  |  |  | 122 |  |  |  | 43 |  |  |  | 77 |  |  |  | 120 |
Professionals |  |  | 115 |  |  |  | 1,078 |  |  |  | 1,193 |  |  |  | 143 |  |  |  | 942 |  |  |  | 1,085 |
Technicians and operators |  |  | 260 |  |  |  | 3,287 |  |  |  | 3,547 |  |  |  | 248 |  |  |  | 3,177 |  |  |  | 3,425 |
Foreign employees |  |  | 11 |  |  |  | 417 |  |  |  | 428 |  |  |  | 19 |  |  |  | 272 |  |  |  | 291 |
Overall total |  |  | 419 |  |  |  | 4,871 |  |  |  | 5,290 |  |  |  | 453 |  |  |  | 4,468 |  |  |  | 4,921 |
Schedule of Shareholders stock and Ownership Percentage [Text Block] | The following information is derived from our registry and reports managed by the Central Securities Depository and informed to the CMF and the Chilean Stock Exchanges.
Shareholder as of December 31, 2018 |  | No, of Series A with ownership |  |  | % of Series A shares |  |  | No, of Series B with ownership |  |  | % of Series B shares |  |  | % of total shares |
Inversiones TLC SPA |  |  | 62,556,568 |  |  |  | 43.80 | % |  |  | - |  |  |  | - |  |  |  | 23.77 | %
Sociedad de Inversiones Pampa Calichera S.A. (*) |  |  | 44,894,152 |  |  |  | 31.43 | % |  |  | 10,093,154 |  |  |  | 8.38 | % |  |  | 20.89 | %
The Bank of New York Mellon, ADRs |  |  | - |  |  |  | - |  |  |  | 35,254,267 |  |  |  | 29.29 | % |  |  | 13.39 | %
Potasios de Chile S.A. (*) |  |  | 18,179,147 |  |  |  | 12.73 | % |  |  | - |  |  |  | - |  |  |  | 6.91 | %
Banco de Chile via non-resident third party accounts |  |  | 15,687 |  |  |  | 0.01 | % |  |  | 10,703,812 |  |  |  | 8.89 | % |  |  | 4.07 | %
Inversiones Global Mining (Chile) Limitada (*) |  |  | 8,798,539 |  |  |  | 6.16 | % |  |  | - |  |  |  | - |  |  |  | 3.34 | %
Banco Itaú through Corpbanca on behalf of foreign investors |  |  | - |  |  |  | - |  |  |  | 8,085,730 |  |  |  | 6.72 | % |  |  | 3.07 | %
Banco Santander via foreign investor accounts |  |  | - |  |  |  | - |  |  |  | 7,138,685 |  |  |  | 5.93 | % |  |  | 2.71 | %
Banchile C de B S A |  |  | 528,092 |  |  |  | 0.37 | % |  |  | 4,028,611 |  |  |  | 3.35 | % |  |  | 1.73 | %
Inversiones la Esperanza de Chile Limitada |  |  | 3,711,598 |  |  |  | 2.60 | % |  |  | 46,500 |  |  |  | 0.04 | % |  |  | 1.43 | %
(*) Total Pampa Group 32 % ( 2.247.895 Series B shares are in the custody of different brokers).
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 via non-resident third party accounts |  |  | - |  |  |  | - |  |  |  | 8,394,289 |  |  |  | 6.97 | % |  |  | 3.19 | %
Banco Itau via Investor Accounts |  |  | 19,125 |  |  |  | 0.01 | % |  |  | 7,017,504 |  |  |  | 5.83 | % |  |  | 2.67 | %
Banco Santander via foreign investor accounts |  |  | - |  |  |  | - |  |  |  | 4,593,336 |  |  |  | 3.82 | % |  |  | 1.75 | %
(*) Total Pampa Group 29,97 % |

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