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Other current and non-current non-financial assets - Movements in Assets for Exploration (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Other current and non-current non-financial assets
Opening balance	$ 26,752	$ 17,883	$ 18,654
Change in assets for exploration and evaluation of mineral resources
Additions	11,341	8,071
Short-term reclassifications	(465)	83	(526)
Increase (decrease) due to transfers and other charges	6,395	715	(245)
Total changes	17,271	8,869	(771)
Total	$ 44,023	$ 26,752	$ 17,883

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

- References

No definition available.

+ Details

Name:	sqm_DisclosureOfOtherNonfinancialAssetsAbstract
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

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Namespace Prefix:	sqm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

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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