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Basis of presentation for the consolidated financial statements (Tables) | 12 Months Ended
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Dec. 31, 2018
Disclosure of Basis of presentation for the consolidated financial statements [Abstract] |
Disclosure Of Reclassification Of Assets [Text Block] | A reconciliation of such differences is presented as follows:
|  | Balances originally reported as of December 31, 2017 |  |  | Reclassified balances as of December 31, 2017 |  |  | Reclassification |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Assets |  |  |  |  |  |  |  |  |  |  |  |
Investments classified using the equity method of accounting |  |  | 146,425 |  |  |  | 152,630 |  |  |  | 6,205 |
Intangible assets other than goodwill |  |  | 105,948 |  |  |  | 113,787 |  |  |  | 7,839 |
Goodwill |  |  | 44,177 |  |  |  | 37,972 |  |  |  | (6,205 | )
Property, plant and equipment |  |  | 1,437,193 |  |  |  | 1,429,354 |  |  |  | (7,839 | )
Total |  |  | 1,733,743 |  |  |  | 1,733,743 |  |  |  | - |
Disclosure Of Classification measurement And Effects By The Application Of IFRS 9 [Table Text Block] | The following is a summary with the classification, measurement and effects by the application of IFRS 9:
Financial Assets |  | Measurement Category under IAS 39 |  |  | Measurement category under IFRS 9 |  |  | 12/31/2017 Total Amount ThUS$ |  |  | IFRS 9 Adjustment ThUS$ |  |  | 01/01/2018 Total Amount Restated ThUS$ |
Description of financial current assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalent |  |  | Amortized cost |  |  |  | Amortized cost |  |  |  | 630,438 |  |  |  | - |  |  |  | 630,438 |
Trade receivables due from related parties |  |  | Amortized cost |  |  |  | Amortized cost |  |  |  | 59,132 |  |  |  | - |  |  |  | 59,132 |
Financial assets measured at amortized cost |  |  | Amortized cost |  |  |  | Amortized cost |  |  |  | 360,941 |  |  |  | - |  |  |  | 360,941 |
Loans and receivables measured at amortized cost |  |  | Amortized cost |  |  |  | Amortized cost |  |  |  | 446,875 |  |  |  | (2,301 | ) |  |  | 444,574 |
Derivatives held for trading at fair value through profit or loss |  |  | FVTPL |  |  |  | FVTPL |  |  |  | 6,038 |  |  |  | - |  |  |  | 6,038 |
Non-current Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Financial assets |  |  | Amortized cost |  |  |  | Amortized cost |  |  |  | 45 |  |  |  | - |  |  |  | 45 |
Loans and receivables |  |  | Amortized cost |  |  |  | Amortized cost |  |  |  | 1,912 |  |  |  | - |  |  |  | 1,912 |
Derivatives for hedging purposes |  |  | FVTOCI |  |  |  | FVTOCI |  |  |  | 8,910 |  |  |  | - |  |  |  | 8,910 |
Financial assets classified as available for sale at fair value through equity |  |  | Irrevocable FVTOCI |  |  |  | FVTOCI |  |  |  | 33,924 |  |  |  | - |  |  |  | 33,924 |
Total IFRS 9 Adjustment |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (2,301 | ) |  |  |  |
Financial Liabilities |  | Measurement Category under IAS 39 |  |  | Measurement category under IFRS 9 |  |  | 12/31/2017 Total Amount ThUS$ |  |  | IFRS 9 Adjustment ThUS$ |  |  | 01/01/2018 Total Amount Restated ThUS$ |
Description of financial Current liabilities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accounts payable to related entities |  |  | Amortized cost |  |  |  | Amortized cost |  |  |  | 1,365 |  |  |  |  |  |  |  | 1,365 |
Derivatives for hedging purposes |  |  | FVTOCI |  |  |  | FVTOCI |  |  |  | 37,287 |  |  |  |  |  |  |  | 37,287 |
Derivatives at fair value through profit or loss |  |  | FVTOCI |  |  |  | FVTPL |  |  |  | 5,979 |  |  |  |  |  |  |  | 5,979 |
Bank loans |  |  | Amortized cost |  |  |  | Amortized cost |  |  |  | 163,568 |  |  |  |  |  |  |  | 163,568 |
Obligations to the public |  |  | Amortized cost |  |  |  | Amortized cost |  |  |  | 13,494 |  |  |  |  |  |  |  | 13,494 |
Financial liabilities at amortized cost (trade and other payables) |  |  | Amortized cost |  |  |  | Amortized cost |  |  |  | 196,280 |  |  |  |  |  |  |  | 196,280 |
Financial Liabilities Non-Current |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Obligations to the public |  |  | Amortized cost |  |  |  | Amortized cost |  |  |  | 1,031,507 |  |  |  |  |  |  |  | 1,031,507 |
Financial liabilities at amortized cost (trade and other payables) |  |  | Amortized cost |  |  |  | Amortized cost |  |  |  | - |  |  |  |  |  |  |  | - |
Deferred tax liabilities |  |  |  |  |  |  |  |  |  |  | 205,904 |  |  |  | (621 | ) |  |  | 205,283 |
Equity |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total equity |  |  |  |  |  |  |  |  |  |  | 2,247,468 |  |  |  | (1,680 | ) |  |  | 2,245,788 |
Total IFRS 9 Adjustment |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (2.301 | ) |  |  |  |
Disclosure of subsidiaries [text block] | Companies included in consolidation:
|  |  |  |  |  |  |  | Ownership interest |
TAX ID |  |  |  | Country of |  |  |  |  |  |  | 12/31/2018 |  |  |  |  |  | 12/31/2017 |
No. |  | Foreign subsidiaries |  | origin |  | Functional currency |  | Direct |  |  | Indirect |  |  | Total |  |  | Total |
Foreign |  | Nitratos Naturais Do Chile Ltda, |  | Brazil |  | US$ |  | 0.0000 |  |  | 100.0000 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | Nitrate Corporation Of Chile Ltd, |  | United Kingdom |  | US$ |  | 0.0000 |  |  | 100.0000 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | SQM North America Corp, |  | USA |  | US$ |  | 40.0000 |  |  | 60.0000 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | SQM Europe N.V. |  | Belgium |  | US$ |  | 0.5800 |  |  | 99.4200 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | Soquimich S.R.L. Argentina |  | Argentina |  | US$ |  | 0.0000 |  |  | 100.0000 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | Soquimich European Holding B.V. |  | Netherlands |  | US$ |  | 0.0000 |  |  | 100.0000 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | SQM Corporation N.V. |  | Netherlands |  | US$ |  | 0.0002 |  |  | 99.9998 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | SQI Corporation N.V. |  | Netherlands |  | US$ |  | 0.0159 |  |  | 99.9841 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | SQM Comercial De México S.A. de C.V. |  | Mexico |  | US$ |  | 0.0100 |  |  | 99.9900 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | North American Trading Company |  | USA |  | US$ |  | 0.0000 |  |  | 100.0000 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | Administración y Servicios Santiago S.A. de C.V. |  | Mexico |  | US$ |  | 0.0000 |  |  | 100.0000 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | SQM Peru S.A. |  | Peru |  | US$ |  | 0.9800 |  |  | 99.0200 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | SQM Ecuador S.A. |  | Ecuador |  | US$ |  | 0.0040 |  |  | 99.9960 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | SQM Nitratos Mexico S.A. de C.V. |  | Mexico |  | US$ |  | 0.0000 |  |  | 100.0000 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | SQMC Holding Corporation L.L.P. |  | USA |  | US$ |  | 0.1000 |  |  | 99.9000 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | SQM Investment Corporation N.V. |  | Netherlands |  | US$ |  | 1.0000 |  |  | 99.0000 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | SQM Brasil Limitada |  | Brazil |  | US$ |  | 1.0900 |  |  | 98.9100 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | SQM France S.A. |  | France |  | US$ |  | 0.0000 |  |  | 100.0000 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | SQM Japan Co. Ltd. |  | Japan |  | US$ |  | 0.1597 |  |  | 99.8403 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | Royal Seed Trading Corporation A.V.V. |  | Aruba |  | US$ |  | 1.6700 |  |  | 98.3300 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | SQM Oceania Pty Limited |  | Australia |  | US$ |  | 0.0000 |  |  | 100.0000 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | Rs Agro-Chemical Trading Corporation A.V.V. |  | Aruba |  | US$ |  | 98.3333 |  |  | 1.6667 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | SQM Colombia SAS |  | Colombia |  | US$ |  | 0.0000 |  |  | 100.0000 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | SQM Australia PTY |  | Australia |  | Australian dollar |  | 0.0000 |  |  | 100.0000 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | SACAL S.A. |  | Argentina |  | Argentine peso |  | 0.0000 |  |  | 100.0000 |  |  | 100.0000 |  |  | 100.0000 |
TAX ID |  |  |  | Country of |  |  |  |  |  |  | 12/31/2018 |  |  |  |  |  | 12/31/2017 |
No. |  | Foreign subsidiaries |  | origin |  | Functional currency |  | Direct |  |  | Indirect |  |  | Total |  |  | Total |
Foreign |  | SQM Indonesia S.A. |  | Indonesia |  | US$ |  | 0.0000 |  |  | 80.0000 |  |  | 80.0000 |  |  | 80.0000 |
Foreign |  | SQM Virginia L.L.C. |  | USA |  | US$ |  | 0.0000 |  |  | 100.0000 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | SQM Italia SRL |  | Italy |  | US$ |  | 0.0000 |  |  | 100.0000 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | Comercial Caimán Internacional S.A. |  | Panama |  | US$ |  | 0.0000 |  |  | 100.0000 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | SQM Africa Pty. |  | South Africa |  | US$ |  | 0.0000 |  |  | 100.0000 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | SQM Lithium Specialties LLC |  | USA |  | US$ |  | 0.0000 |  |  | 100.0000 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | SQM Iberian S.A. |  | Spain |  | US$ |  | 0.0000 |  |  | 100.0000 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | SQM Beijing Commercial Co. Ltd. |  | China |  | US$ |  | 0.0000 |  |  | 100.0000 |  |  | 100.0000 |  |  | 100.0000 |
Foreign |  | SQM Thailand Limited |  | Thailand |  | US$ |  | 0.0000 |  |  | 99.996 |  |  | 99.996 |  |  | 99.996 |
Foreign |  | SQM Internacional N.V. |  | Belgium |  | US$ |  | 0.5800 |  |  | 99.4200 |  |  | 100.0000 |  |  | 0.0000 |
Foreign |  | SQM (Shanghai) Chemicals Co. Ltd. |  | China |  | US$ |  | 0.0000 |  |  | 100.0000 |  |  | 100.0000 |  |  | 0.0000 |
|  |  |  |  |  |  |  | Ownership interest |
TAX ID |  |  |  | Country of |  |  |  |  |  |  | 12/31/2018 |  |  |  |  |  | 12/31/2017 |
No. |  | Domestic subsidiaries |  | origin |  | Functional currency |  | Direct |  |  | Indirect |  |  | Total |  |  | Total |
96.801.610-5 |  | Comercial Hydro S.A. |  | Chile |  | US$ |  | 0,0000 |  |  | 60,6383 |  |  | 60,6383 |  |  | 60,6383 |
96.651.060-9 |  | SQM Potasio S.A. |  | Chile |  | US$ |  | 99,9999 |  |  | 0,0000 |  |  | 99,9999 |  |  | 99,9999 |
96.592.190-7 |  | SQM Nitratos S.A. |  | Chile |  | US$ |  | 99,9999 |  |  | 0,0001 |  |  | 100,0000 |  |  | 100,0000 |
96.592.180-K |  | Ajay SQM Chile S.A. |  | Chile |  | US$ |  | 51,0000 |  |  | 0,0000 |  |  | 51,0000 |  |  | 51,0000 |
86.630.200-6 |  | SQMC Internacional Ltda. |  | Chile |  | Ch$ |  | 0,0000 |  |  | 60,6381 |  |  | 60,6381 |  |  | 60,6381 |
79.947.100-0 |  | SQM Industrial S.A. |  | Chile |  | US$ |  | 99,0470 |  |  | 0,9530 |  |  | 100,0000 |  |  | 100,0000 |
79.906.120-1 |  | Isapre Norte Grande Ltda. |  | Chile |  | Ch$ |  | 1,0000 |  |  | 99,0000 |  |  | 100,0000 |  |  | 100,0000 |
79.876.080-7 |  | Almacenes y Depósitos Ltda. |  | Chile |  | Ch$ |  | 1,0000 |  |  | 99,0000 |  |  | 100,0000 |  |  | 100,0000 |
79.770.780-5 |  | Servicios Integrales de Tránsitos y Transferencias S.A. |  | Chile |  | US$ |  | 0,0003 |  |  | 99,9997 |  |  | 100,0000 |  |  | 100,0000 |
79.768.170-9 |  | Soquimich Comercial S.A. |  | Chile |  | US$ |  | 0,0000 |  |  | 60,6383 |  |  | 60,6383 |  |  | 60,6383 |
79.626.800-K |  | SQM Salar S.A. |  | Chile |  | US$ |  | 18,1800 |  |  | 81,8200 |  |  | 100,0000 |  |  | 100,0000 |
78.053.910-0 |  | Proinsa Ltda. |  | Chile |  | Ch$ |  | 0,0000 |  |  | 60,5800 |  |  | 60,5800 |  |  | 60,5800 |
76.534.490-5 |  | Sociedad Prestadora de Servicios de Salud Cruz del Norte S.A. |  | Chile |  | Ch$ |  | 0,0000 |  |  | 100,0000 |  |  | 100,0000 |  |  | 100,0000 |
76.425.380-9 |  | Exploraciones Mineras S.A. |  | Chile |  | US$ |  | 0,2691 |  |  | 99,7309 |  |  | 100,0000 |  |  | 100,0000 |
76.064.419-6 |  | Comercial Agrorama Ltda. (a) |  | Chile |  | Ch$ |  | 0,0000 |  |  | 42,4468 |  |  | 42,4468 |  |  | 42,4468 |
76.145.229-0 |  | Agrorama S.A. |  | Chile |  | Ch$ |  | 0,0000 |  |  | 60,6377 |  |  | 60,6377 |  |  | 60,6377 |
76.359.919-1 |  | Orcoma Estudios SPA |  | Chile |  | US$ |  | 51,0000 |  |  | 0,0000 |  |  | 51,0000 |  |  | 51,0000 |
76.360.575-2 |  | Orcoma SPA |  | Chile |  | US$ |  | 100,0000 |  |  | 0,0000 |  |  | 100,0000 |  |  | 100,0000 |
76.686.311-9 |  | SQM MaG SpA. |  | Chile |  | US$ |  | 0,0000 |  |  | 100,0000 |  |  | 100,0000 |  |  | 100,0000 |

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- Definition The disclosure of subsidiaries. [Refer: Subsidiaries [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2018-01-01 -Paragraph 17 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2018-03-01&anchor=para_17_b&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2018-01-01 -Paragraph 16 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2018-03-01&anchor=para_16_b&doctype=Standard -URIDate 2018-03-16 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2018-01-01 -Paragraph B4 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2018-03-01&anchor=para_B4_a&doctype=Appendix&seq=2 -URIDate 2018-03-16 + Details
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