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Basis of presentation for the consolidated financial statements (Details Textual) $ in Thousands | 12 Months Ended
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Dec. 31, 2018 USD ($)
Disclosure of Basis of presentation for the consolidated financial statements [Abstract] |
Adjustments Through IFRS | $ 2,301
Deferred Taxes | $ 1,680

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- Definition The adjustments to financial statements due to implementation of ifrs + References No definition available. + Details
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Namespace Prefix: | sqm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The amount represents deferred taxes due to implementation of ifrs. + References No definition available. + Details
Name: | sqm_DeferredTaxes
Namespace Prefix: | sqm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- References No definition available. + Details
Name: | sqm_DisclosureOfBasisOfPresentationForConsolidatedFinancialStatementsAbstract
Namespace Prefix: | sqm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration