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Significant accounting policies - Minimum Dividend (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Minimum
Significant accounting policies [Line Items]
Cash dividend rate	30.00%	30.00%

X

- Definition

The percentage of cash dividend the company expected to pay.

+ References

No definition available.

+ Details

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Namespace Prefix:	sqm_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: