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Intangible assets and goodwill (Details 5) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Disclosure of reconciliation of changes in goodwill [line items] |  |
Goodwill Begining Balance | $ 34,866 | $ 37,972
Additional | 0 | 0
Recognition subsequent to deferred tax assets | 0 | 0
Decreases for classification as held for sale | 34,726 | 0
Goodwill write-off without having been included previously in disposal groups classified as held for sale | 0 | 0
Impairment losses | (140) | (3,254)
Increase (decrease) for net exchange differences | 0 | 0
Increase (decrease) due to other changes | 0 | (3,106)
Total increase (decrease) | (140) | (3,106)
Total increase (decrease) | (1,132) | 72,457
Goodwill Ending Balance | 34,726 | 34,866
Gross carrying amount [member] |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |
Goodwill Begining Balance | 38,120 | 37,972
Additional | 0 | 0
Recognition subsequent to deferred tax assets | 0 | 0
Decreases for classification as held for sale | 0 | 0
Goodwill write-off without having been included previously in disposal groups classified as held for sale | 0 | 0
Impairment losses | 0 | 0
Increase (decrease) for net exchange differences | 0 | 0
Increase (decrease) due to other changes | 0 | 148
Total increase (decrease) | 0 | 148
Total increase (decrease) | 4,268 | 83,460
Goodwill Ending Balance | 38,120 | 38,120
Accumulated impairment [member] |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |
Goodwill Begining Balance | (3,254) | 0
Additional | 0 | 0
Recognition subsequent to deferred tax assets | 0 | 0
Decreases for classification as held for sale | 0 | 0
Goodwill write-off without having been included previously in disposal groups classified as held for sale | 0 | 0
Impairment losses | (140) | 0
Increase (decrease) for net exchange differences | 0 | 0
Increase (decrease) due to other changes | 0 | (3,254)
Total increase (decrease) | (140) | (3,254)
Goodwill Ending Balance | (3,394) | (3,254)
SQM Industrial S.A. [Member] |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |
Goodwill Begining Balance | 3,214 | 3,214
Additional | 0 | 0
Recognition subsequent to deferred tax assets | 0 | 0
Decreases for classification as held for sale | 0 | 0
Goodwill write-off without having been included previously in disposal groups classified as held for sale | 0 | 0
Impairment losses | (3,214) | 0
Increase (decrease) for net exchange differences | 0 | 0
Increase (decrease) due to other changes | 0 | (3,214)
Total increase (decrease) | 0 | (3,214)
Goodwill Ending Balance | 3,214 | 3,214
SQM Industrial S.A. [Member] | Gross carrying amount [member] |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |
Goodwill Begining Balance | 3,214 | 3,214
Additional | 0 | 0
Recognition subsequent to deferred tax assets | 0 | 0
Decreases for classification as held for sale | 0 | 0
Goodwill write-off without having been included previously in disposal groups classified as held for sale | 0 | 0
Impairment losses | 0 | 0
Increase (decrease) for net exchange differences | 0 | 0
Increase (decrease) due to other changes | 0 | 0
Total increase (decrease) | 0 | 0
Goodwill Ending Balance |  | 3,214
SQM Industrial S.A. [Member] | Accumulated impairment [member] |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |
Goodwill Begining Balance | (3,214) | 0
Additional | 0 | 0
Recognition subsequent to deferred tax assets | 0 | 0
Decreases for classification as held for sale | 0 | 0
Goodwill write-off without having been included previously in disposal groups classified as held for sale | 0 | 0
Impairment losses | 0 | 0
Increase (decrease) for net exchange differences | 0 | 0
Increase (decrease) due to other changes | 0 | (3,214)
Total increase (decrease) | 0 | (3,214)
Goodwill Ending Balance | (3,214) | (3,214)
SQM S.A [Member] |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |
Goodwill Begining Balance | 22,255 | 22,255
Additional | 0 | 0
Recognition subsequent to deferred tax assets | 0 | 0
Decreases for classification as held for sale | 0 | 0
Goodwill write-off without having been included previously in disposal groups classified as held for sale | 0 | 0
Impairment losses | 0 | 0
Increase (decrease) for net exchange differences | 0 | 0
Increase (decrease) due to other changes | 0 | 0
Total increase (decrease) | 0 | 0
Goodwill Ending Balance | 22,255 | 22,255
SQM S.A [Member] | Gross carrying amount [member] |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |
Goodwill Begining Balance | 22,255 | 22,255
Additional | 0 | 0
Recognition subsequent to deferred tax assets | 0 | 0
Decreases for classification as held for sale | 0 | 0
Goodwill write-off without having been included previously in disposal groups classified as held for sale | 0 | 0
Impairment losses | 0 | 0
Increase (decrease) for net exchange differences | 0 | 0
Increase (decrease) due to other changes | 0 | 0
Total increase (decrease) | 0 | 0
Goodwill Ending Balance |  | 22,255
SQM S.A [Member] | Accumulated impairment [member] |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |
Goodwill Begining Balance | 0 | 0
Additional | 0 | 0
Recognition subsequent to deferred tax assets | 0 | 0
Decreases for classification as held for sale | 0 | 0
Goodwill write-off without having been included previously in disposal groups classified as held for sale | 0 | 0
Impairment losses | 0 | 0
Increase (decrease) for net exchange differences | 0 | 0
Increase (decrease) due to other changes | 0 | 0
Total increase (decrease) | 0 | 0
Goodwill Ending Balance | 0 | 0
SQM Iberian S.A. [Member] |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |
Goodwill Begining Balance | 148 | 0
Additional | 0 | 0
Recognition subsequent to deferred tax assets | 0 | 0
Decreases for classification as held for sale | 0 | 0
Goodwill write-off without having been included previously in disposal groups classified as held for sale | 0 | 0
Impairment losses | 0 | 0
Increase (decrease) for net exchange differences | 0 | 0
Increase (decrease) due to other changes | 0 | 148
Total increase (decrease) | 0 | 148
Goodwill Ending Balance | 148 | 148
SQM Iberian S.A. [Member] | Gross carrying amount [member] |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |
Goodwill Begining Balance | 148 | 0
Additional | 0 | 0
Recognition subsequent to deferred tax assets | 0 | 0
Decreases for classification as held for sale | 0 | 0
Goodwill write-off without having been included previously in disposal groups classified as held for sale | 0 | 0
Impairment losses | 0 | 0
Increase (decrease) for net exchange differences | 0 | 0
Increase (decrease) due to other changes | 0 | 148
Total increase (decrease) | 0 | 148
Goodwill Ending Balance |  | 148
SQM Iberian S.A. [Member] | Accumulated impairment [member] |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |
Goodwill Begining Balance | 0 | 0
Additional | 0 | 0
Recognition subsequent to deferred tax assets | 0 | 0
Decreases for classification as held for sale | 0 | 0
Goodwill write-off without having been included previously in disposal groups classified as held for sale | 0 | 0
Impairment losses | 0 | 0
Increase (decrease) for net exchange differences | 0 | 0
Increase (decrease) due to other changes | 0 | 0
Total increase (decrease) | 0 | 0
Goodwill Ending Balance | 0 | 0
SQM Investment Corporation N.V. [Member] |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |
Goodwill Begining Balance | 86 | 86
Additional | 0 | 0
Recognition subsequent to deferred tax assets | 0 | 0
Decreases for classification as held for sale | 0 | 0
Goodwill write-off without having been included previously in disposal groups classified as held for sale | 0 | 0
Impairment losses | 0 | 0
Increase (decrease) for net exchange differences | 0 | 0
Increase (decrease) due to other changes | 0 | 0
Total increase (decrease) | 0 | 0
Goodwill Ending Balance | 86 | 86
SQM Investment Corporation N.V. [Member] | Gross carrying amount [member] |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |
Goodwill Begining Balance | 86 | 86
Additional | 0 | 0
Recognition subsequent to deferred tax assets | 0 | 0
Decreases for classification as held for sale | 0 | 0
Goodwill write-off without having been included previously in disposal groups classified as held for sale | 0 | 0
Impairment losses | 0 | 0
Increase (decrease) for net exchange differences | 0 | 0
Increase (decrease) due to other changes | 0 | 0
Total increase (decrease) | 0 | 0
Goodwill Ending Balance |  | 86
SQM Investment Corporation N.V. [Member] | Accumulated impairment [member] |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |
Goodwill Begining Balance | 0 | 0
Additional | 0 | 0
Recognition subsequent to deferred tax assets | 0 | 0
Decreases for classification as held for sale | 0 | 0
Goodwill write-off without having been included previously in disposal groups classified as held for sale | 0 | 0
Impairment losses | 0 | 0
Increase (decrease) for net exchange differences | 0 | 0
Increase (decrease) due to other changes | 0 | 0
Total increase (decrease) | 0 | 0
Goodwill Ending Balance | 0 | 0
Soquimich Comercial S.A. [Member] |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |
Goodwill Begining Balance | 280 | 320
Additional | 0 | 0
Recognition subsequent to deferred tax assets | 0 | 0
Decreases for classification as held for sale | 140 | 0
Goodwill write-off without having been included previously in disposal groups classified as held for sale | 0 | 0
Impairment losses | (180) | 0
Increase (decrease) for net exchange differences | 0 | 0
Increase (decrease) due to other changes | 0 | (40)
Total increase (decrease) | (140) | (40)
Goodwill Ending Balance | 140 | 280
Soquimich Comercial S.A. [Member] | Gross carrying amount [member] |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |
Goodwill Begining Balance | 320 | 320
Additional | 0 | 0
Recognition subsequent to deferred tax assets | 0 | 0
Decreases for classification as held for sale | 0 | 0
Goodwill write-off without having been included previously in disposal groups classified as held for sale | 0 | 0
Impairment losses | 0 | 0
Increase (decrease) for net exchange differences | 0 | 0
Increase (decrease) due to other changes | 0 | 0
Total increase (decrease) | 0 | 0
Goodwill Ending Balance |  | 320
Soquimich Comercial S.A. [Member] | Accumulated impairment [member] |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |
Goodwill Begining Balance | (40) | 0
Additional | 0 | 0
Recognition subsequent to deferred tax assets | 0 | 0
Decreases for classification as held for sale | 0 | 0
Goodwill write-off without having been included previously in disposal groups classified as held for sale | 0 | 0
Impairment losses | (140) | 0
Increase (decrease) for net exchange differences | 0 | 0
Increase (decrease) due to other changes | 0 | (40)
Total increase (decrease) | (140) | (40)
Goodwill Ending Balance | (180) | (40)
Soquimich European Holding B.V. [Member] |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |
Goodwill Begining Balance | 11,373 | 11,373
Additional | 0 | 0
Recognition subsequent to deferred tax assets | 0 | 0
Decreases for classification as held for sale | 11,373 | 0
Goodwill write-off without having been included previously in disposal groups classified as held for sale | 0 | 0
Impairment losses | 0 | 0
Increase (decrease) for net exchange differences | 0 | 0
Increase (decrease) due to other changes | 0 | 0
Total increase (decrease) | 0 | 0
Goodwill Ending Balance | 11,373 | 11,373
Soquimich European Holding B.V. [Member] | Gross carrying amount [member] |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |
Goodwill Begining Balance | 11,373 | 11,373
Additional | 0 | 0
Recognition subsequent to deferred tax assets | 0 | 0
Decreases for classification as held for sale | 0 | 0
Goodwill write-off without having been included previously in disposal groups classified as held for sale | 0 | 0
Impairment losses | 0 | 0
Increase (decrease) for net exchange differences | 0 | 0
Increase (decrease) due to other changes | 0 | 0
Total increase (decrease) | 0 | 0
Goodwill Ending Balance |  | 11,373
Soquimich European Holding B.V. [Member] | Accumulated impairment [member] |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |
Goodwill Begining Balance | 0 | 0
Additional | 0 | 0
Recognition subsequent to deferred tax assets | 0 | 0
Decreases for classification as held for sale | 0 | 0
Goodwill write-off without having been included previously in disposal groups classified as held for sale | 0 | 0
Impairment losses | 0 | 0
Increase (decrease) for net exchange differences | 0 | 0
Increase (decrease) due to other changes | 0 | 0
Total increase (decrease) | 0 | 0
Goodwill Ending Balance | 0 | 0
SQM Potasio S.A. [Member] |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |
Goodwill Begining Balance | 724 | 724
Additional | 0 | 0
Recognition subsequent to deferred tax assets | 0 | 0
Decreases for classification as held for sale | 0 | 0
Goodwill write-off without having been included previously in disposal groups classified as held for sale | 0 | 0
Impairment losses | 0 | 0
Increase (decrease) for net exchange differences | 0 | 0
Increase (decrease) due to other changes | 0 | 0
Total increase (decrease) | 0 | 0
Goodwill Ending Balance | 724 | 724
SQM Potasio S.A. [Member] | Gross carrying amount [member] |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |
Goodwill Begining Balance | 724 | 724
Additional | 0 | 0
Recognition subsequent to deferred tax assets | 0 | 0
Decreases for classification as held for sale | 0 | 0
Goodwill write-off without having been included previously in disposal groups classified as held for sale | 0 | 0
Impairment losses | 0 | 0
Increase (decrease) for net exchange differences | 0 | 0
Increase (decrease) due to other changes | 0 | 0
Total increase (decrease) | 0 | 0
Goodwill Ending Balance |  | 724
SQM Potasio S.A. [Member] | Accumulated impairment [member] |  |
Disclosure of reconciliation of changes in goodwill [line items] |  |
Goodwill Begining Balance | 0 | 0
Additional | 0 | 0
Recognition subsequent to deferred tax assets | 0 | 0
Decreases for classification as held for sale | 0 | 0
Goodwill write-off without having been included previously in disposal groups classified as held for sale | 0 | 0
Impairment losses | 0 | 0
Increase (decrease) for net exchange differences | 0 | 0
Increase (decrease) due to other changes | 0 | 0
Total increase (decrease) | 0 | 0
Goodwill Ending Balance | $ 0 | $ 0

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- Definition The amount of additional goodwill recognised, except goodwill included in a disposal group that, on acquisition, meets the criteria to be classified as held for sale in accordance with IFRS 5. [Refer: Goodwill; Disposal groups classified as held for sale [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph B67 -Subparagraph d -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_B67_d_ii&doctype=Appendix&subtype=B -URIDate 2019-03-27 + Details
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- Definition The increase (decrease) in intangible assets other than goodwill. [Refer: Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 38 -IssueDate 2019-01-01 -Paragraph 118 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=38&code=ifrs-tx-2019-en-r&anchor=para_118_e&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The decrease in goodwill due to classification as held for sale. [Refer: Goodwill; Disposal groups classified as held for sale [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph B67 -Subparagraph d -Clause iv -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_B67_d_iv&doctype=Appendix&subtype=B -URIDate 2019-03-27 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount of assets representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognised. [Refer: Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph B67 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_B67_d&doctype=Appendix&subtype=B -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2019-01-01 -Paragraph 134 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2019-en-r&anchor=para_134_a&doctype=Standard -URIDate 2019-03-27 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2019-01-01 -Paragraph 135 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2019-en-r&anchor=para_135_a&doctype=Standard -URIDate 2019-03-27 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 54 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_54_c&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of goodwill derecognised without having previously been included in a disposal group classified as held for sale. [Refer: Goodwill; Disposal groups classified as held for sale [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph B67 -Subparagraph d -Clause iv -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_B67_d_iv&doctype=Appendix&subtype=B -URIDate 2019-03-27 + Details
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- Definition The amount of impairment loss recognised in profit or loss for goodwill. [Refer: Impairment loss recognised in profit or loss; Goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph B67 -Subparagraph d -Clause v -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_B67_d_v&doctype=Appendix&subtype=B -URIDate 2019-03-27 + Details
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- Definition The increase (decrease) in goodwill resulting from net exchange differences arising on the translation of the financial statements from the functional currency into a different presentation currency, including the translation of a foreign operation into the presentation currency of the reporting entity. [Refer: Goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph B67 -Subparagraph d -Clause vi -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_B67_d_vi&doctype=Appendix&subtype=B -URIDate 2019-03-27 + Details
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- Definition The decrease in goodwill resulting from the subsequent recognition of deferred tax assets during the measurement period for a business combination. [Refer: Goodwill; Deferred tax assets; Business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2019-01-01 -Paragraph B67 -Subparagraph d -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2019-en-r&anchor=para_B67_d_iii&doctype=Appendix&subtype=B -URIDate 2019-03-27 + Details
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