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Inventories (Details 1) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Inventories [Abstract] |  |
Raw material reserves | $ 1,865 | $ 1,934
Products-in-progress reserves | 59,858 | 66,122
Finished product reserves | 14,169 | 12,874
Total | $ 75,892 | $ 80,930

X
- Definition The amount of reserves relating to finished goods. + References No definition available. + Details
Name: | sqm_FinishedGoodsReserves
Namespace Prefix: | sqm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition The amount of inventory reserves recognized. + References No definition available. + Details
Name: | sqm_InventoryReserves
Namespace Prefix: | sqm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of reserves relating to raw materials. + References No definition available. + Details
Name: | sqm_RawMaterialReserves
Namespace Prefix: | sqm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The amount of reserves relating to work in progress. + References No definition available. + Details
Name: | sqm_WorkInProgressReserves
Namespace Prefix: | sqm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant