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Effect of fluctuations in foreign currency exchange rates | 12 Months Ended
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Dec. 31, 2018
Disclosure of effect of changes in foreign exchange rates [Abstract] |
Disclosure of effect of changes in foreign exchange rates [text block] |
| Note 28 | Effect of fluctuations in foreign currency exchange rates
| a) | Foreign currency exchange differences recognized in profit or loss except for financial instruments measured at fair value through profit or loss:
|  | 12/31/2018 ThUS$ |  |  | 12/31/2017 ThUS$ |  |  | 12/31/2016 ThUS$ |
Conversion foreign exchange gains (losses) recognized in the result of the year. |  |  | (16,597 | ) |  |  | (1,299 | ) |  |  | 460 |
Conversion foreign exchange reserves attributable to the owners of the controlling entity. |  |  | (1,394 | ) |  |  | (5,450 | ) |  |  | (5,428 | )
Conversion foreign exchange reserves attributable to the non-controlling entity. |  |  | 168 |  |  |  | 4 |  |  |  | 35 |
| b) | Reserves for foreign currency exchange differences:
As of December 31, 2018 and 2017, foreign currency exchange differences are detailed as follows:
Detail |  | 12/31/2018 ThUS$ |  |  | 12/31/2017 ThUS$ |  |  | 12/31/2016 ThUS$ |
Changes in equity generated by conversion of equity value: |  |  |  |  |  |  |  |  |  |  |  |
Comercial Hydro S.A. |  |  | 1,004 |  |  |  | 1,004 |  |  |  | 1,004 |
SQMC Internacional Ltda. |  |  | (17 | ) |  |  | (2 | ) |  |  | (13 | )
Proinsa Ltda. |  |  | (11 | ) |  |  | (7 | ) |  |  | (10 | )
Comercial Agrorama Ltda. |  |  | (21 | ) |  |  | (44 | ) |  |  | (69 | )
Isapre Norte Grande Ltda. |  |  | (1 | ) |  |  | (74 | ) |  |  | (124 | )
Almacenes y Depósitos Ltda. |  |  | 113 |  |  |  | 97 |  |  |  | 47 |
Sacal S.A. |  |  | (3 | ) |  |  | - |  |  |  | (29 | )
Sociedad Prestadora de Servicios de Salud Cruz del Norte S.A. |  |  | (10 | ) |  |  | - |  |  |  | (6 | )
Agrorama S.A. |  |  | 132 |  |  |  | (98 | ) |  |  | (49 | )
Doktor Tarsa |  |  | (13,811 | ) |  |  | (14,447 | ) |  |  | (12,264 | )
SQM Vitas Fzco |  |  | (2,682 | ) |  |  | (1,779 | ) |  |  | (1,801 | )
Ajay Europe |  |  | (1,270 | ) |  |  | (831 | ) |  |  | (1,935 | )
SQM Eastmed Turkey |  |  | (113 | ) |  |  | (92 | ) |  |  | (95 | )
Charlee SQM (Thailand) Co. Ltd. |  |  | - |  |  |  | (285 | ) |  |  | (460 | )
Coromandel SQM India |  |  | (393 | ) |  |  | (234 | ) |  |  | (282 | )
SQM Italia SRL |  |  | (213 | ) |  |  | (154 | ) |  |  | (287 | )
SQM Oceanía Pty Ltd. |  |  | (634 | ) |  |  | (634 | ) |  |  | (634 | )
SQM Indonesia S.A. |  |  | (124 | ) |  |  | (124 | ) |  |  | (124 | )
Abu Dhabi Fertillizers Industries WWL. |  |  | (435 | ) |  |  | (435 | ) |  |  | (434 | )
SQM Vitas Holland |  |  | (170 | ) |  |  | (101 | ) |  |  | (280 | )
SQM Thailand Limited |  |  | (68 | ) |  |  | (68 | ) |  |  | (68 | )
SQM Europe |  |  | (1,983 | ) |  |  | (1,550 | ) |  |  | (1,550 | )
Minera Exar S.A. |  |  | - |  |  |  | (5,209 | ) |  |  | - |
SQM Australia Pty Ltd. |  |  | (4,222 | ) |  |  | 154 |  |  |  | - |
Pavoni & C. Spa |  |  | 70 |  |  |  | - |  |  |  | - |
Terra Tarsa BV |  |  | (82 | ) |  |  | - |  |  |  | - |
Plantacote NV |  |  | (34 | ) |  |  | - |  |  |  | - |
Doktolab Tarim Arastirma San. |  |  | (29 | ) |  |  | - |  |  |  | - |
Kore Potash PLC (a) |  |  | (1,206 | ) |  |  | - |  |  |  | - |
SQM Colombia SAS |  |  | (94 | ) |  |  | - |  |  |  | - |
Total |  |  | (26,307 | ) |  |  | (24,913 | ) |  |  | (19,463 | )
| c) | Functional and presentation currency
The functional currency of these companies corresponds to the currency of the country of origin of each entity, and its presentation currency is the U.S. dollar.
| d) | Reasons to use one presentation currency and a different functional currency
| - | The total revenues of these subsidiaries are associated with the local currency.
| - | The commercialization cost structure of these companies is affected by the local currency.

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