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Contingencies and restrictions - Environmental Contingencies (Details) - monthlyTaxUnit | Oct. 15, 2024 | Apr. 14, 2020
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SMA Environmental Case | Superintendency of Environment (SMA) | Legal proceedings contingent liability |  |
Disclosure of contingent liabilities [line items] |  |
Estimated financial effect of contingent liabilities, monthly tax unit | 1,285 | 4,180

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Estimated Financial Effect Of Contingent Liabilities, Monthly Tax Unit + References No definition available. + Details
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Namespace Prefix: | sqm_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Details
Name: | srt_LitigationCaseAxis=sqm_SMAEnvironmentalCaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | dei_LegalEntityAxis=sqm_SuperintendencyOfEnvironmentSMAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ifrs-full_ClassesOfContingentLiabilitiesAxis=ifrs-full_LegalProceedingsContingentLiabilityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |