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v3.20.1

Identification and Activities of the Company and Subsidiaries (Details 1) | Dec. 31, 2019 | Dec. 31, 2019 Employees | Dec. 31, 2018 | Dec. 31, 2018 Employees
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Disclosure Of Information About Employees Explanatory [Line Items] |  |  |  |
Number of employees | 124 | 5,741 | 123 | 5,290
Executives [Member] |  |  |  |
Disclosure Of Information About Employees Explanatory [Line Items] |  |  |  |
Number of employees |  | 121 |  | 122
Professionals [Member] |  |  |  |
Disclosure Of Information About Employees Explanatory [Line Items] |  |  |  |
Number of employees |  | 1,280 |  | 1,193
Technicians and operators [Member] |  |  |  |
Disclosure Of Information About Employees Explanatory [Line Items] |  |  |  |
Number of employees |  | 3,763 |  | 3,547
Foreign employees [Member] |  |  |  |
Disclosure Of Information About Employees Explanatory [Line Items] |  |  |  |
Number of employees |  | 577 |  | 428
SQM S.A [Member] |  |  |  |
Disclosure Of Information About Employees Explanatory [Line Items] |  |  |  |
Number of employees |  | 439 |  | 419
SQM S.A [Member] | Executives [Member] |  |  |  |
Disclosure Of Information About Employees Explanatory [Line Items] |  |  |  |
Number of employees |  | 30 |  | 33
SQM S.A [Member] | Professionals [Member] |  |  |  |
Disclosure Of Information About Employees Explanatory [Line Items] |  |  |  |
Number of employees |  | 110 |  | 115
SQM S.A [Member] | Technicians and operators [Member] |  |  |  |
Disclosure Of Information About Employees Explanatory [Line Items] |  |  |  |
Number of employees |  | 282 |  | 260
SQM S.A [Member] | Foreign employees [Member] |  |  |  |
Disclosure Of Information About Employees Explanatory [Line Items] |  |  |  |
Number of employees |  | 17 |  | 11
Other Subsidiaries [Member] |  |  |  |
Disclosure Of Information About Employees Explanatory [Line Items] |  |  |  |
Number of employees |  | 5,302 |  | 4,871
Other Subsidiaries [Member] | Executives [Member] |  |  |  |
Disclosure Of Information About Employees Explanatory [Line Items] |  |  |  |
Number of employees |  | 91 |  | 89
Other Subsidiaries [Member] | Professionals [Member] |  |  |  |
Disclosure Of Information About Employees Explanatory [Line Items] |  |  |  |
Number of employees |  | 1,170 |  | 1,078
Other Subsidiaries [Member] | Technicians and operators [Member] |  |  |  |
Disclosure Of Information About Employees Explanatory [Line Items] |  |  |  |
Number of employees |  | 3,481 |  | 3,287
Other Subsidiaries [Member] | Foreign employees [Member] |  |  |  |
Disclosure Of Information About Employees Explanatory [Line Items] |  |  |  |
Number of employees |  | 560 |  | 417

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