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Other current and non-current non-financial assets (Details 1) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of other non-financials asset [Abstract] |  |  |
Opening balance | $ 17,883 | $ 18,654 | $ 26,189
Change in assets for exploration and evaluation of mineral resources |  |  |
Additions | 8,071 | 0 | 0
Short-term reclassifications | 83 | (526) | (1,311)
Increase (decrease) due to transfers and other charges | 715 | (245) | (6,224)
Total changes | 8,869 | (771) | (7,535)
Total | $ 26,752 | $ 17,883 | $ 18,654

X
- Definition The amount of additions to exploration and mineral resource, other than those acquired through business combinations. + References No definition available. + Details
Name: | sqm_AdditionsOtherThanBusinessCombinationsExplorationAndMineralResource
Namespace Prefix: | sqm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The disclosure of other non-financials asset + References No definition available. + Details
Name: | sqm_DisclosureOfOtherNonfinancialsAssetAbstract
Namespace Prefix: | sqm_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The increase (decrease) in exploration and mineral resource resulting from changes that the entity does not separately disclose in the same statement or note. + References No definition available. + Details
Name: | sqm_IncreaseDecreaseDueToTransfersAndOtherChargesForExplorationAndMineralResource
Namespace Prefix: | sqm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Definition Total increase (decrease) in prepaid stain development expenses and prospecting expenses. + References No definition available. + Details
Name: | sqm_IncreaseDecreaseInPrepaidStainDevelopmentExpensesAndProspectingExpenses
Namespace Prefix: | sqm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The amount of prepaid stain development expenses and prospecting expenses. + References No definition available. + Details
Name: | sqm_PrepaidStainDevelopmentExpensesAndProspectingExpenses
Namespace Prefix: | sqm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of prepaid stain development expenses and prospecting expenses. + References No definition available. + Details
Name: | sqm_PrepaidStainDevelopmentExpensesAndProspectingsExpense
Namespace Prefix: | sqm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The amount of reclassifications to exploration and mineral resource + References No definition available. + Details
Name: | sqm_ReclassificationOfExplorationAndMineralResource
Namespace Prefix: | sqm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration