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Employee benefits - Cost of Service or Benefits Received (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Employee Benefits
Financial cost	$ 12	$ 12	$ 255
Real loss in plan assets	(231)	(214)	(363)
Settlement	0	0	(1,627)
Net periodic pension expenses	$ (219)	$ (202)	$ (1,735)

X

- Definition

The amount of service cost relating to periodic pension expense.

+ References

No definition available.

+ Details

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

X

- Definition

Employee Benefits

+ References

No definition available.

+ Details

Name:	sqm_EmployeeBenefits
Namespace Prefix:	sqm_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of net periodic pension expense.

+ References

No definition available.

+ Details

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

X

- Definition

The amount of return (loss) on plan assets.

+ References

No definition available.

+ Details

Name:	sqm_ReturnLossOnPlanAssets
Namespace Prefix:	sqm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The settlement adjustment to recognize the minimum pension obligation.

+ References

No definition available.

+ Details

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