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Equity-accounted investees (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Equity-accounted investees [Line Items] |  |  |  |
Investments accounted for using equity method |  | $ 85,993,000 | $ 109,435,000 | $ 111,549,000
Share of other comprehensive income of associates and joint ventures accounted for using equity method, before tax |  | 7,500,000 |  |
Investments accounted for using equity method [member] |  |  |  |
Equity-accounted investees [Line Items] |  |  |  |
Investments accounted for using equity method | [1] | 60,023,000 | 85,092,000 | 75,976,000
Share in profit (loss) of associates and joint ventures accounted for using the equity method |  | 7,118,000 | 8,402,000 | 5,081,000
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax |  | 382,000 | (571,000) | (1,177)
Share of other comprehensive income of associates and joint ventures accounted for using equity method, before tax |  |  | 7,831,000 | 3,904,000
Abu Dhabi Fertilizer Industries WWL |  |  |  |
Equity-accounted investees [Line Items] |  |  |  |
Investments accounted for using equity method | [1] | 11,505,000 | 11,609,000 | 10,821,000
Share in profit (loss) of associates and joint ventures accounted for using the equity method |  | (156,000) | 634,000 | 596,000
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax |  | 0 | 1,000 | 0
Share of other comprehensive income of associates and joint ventures accounted for using equity method, before tax |  | (156,000) | 635,000 | 596,000
Doktor Tarsa Tarim Sanayi AS |  |  |  |
Equity-accounted investees [Line Items] |  |  |  |
Investments accounted for using equity method | [1],[2] | 0 | 26,001,000 | 21,582,000
Share in profit (loss) of associates and joint ventures accounted for using the equity method | [2] | 4,031,000 | 3,912,000 | 241,000
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax | [2] | 0 | 198,000 | 489,000
Share of other comprehensive income of associates and joint ventures accounted for using equity method, before tax | [2] | 4,031,000 | 4,110,000 | 730,000
Ajay North America |  |  |  |
Equity-accounted investees [Line Items] |  |  |  |
Investments accounted for using equity method | [1] | 14,468,000 | 14,669,000 | 14,951,000
Share in profit (loss) of associates and joint ventures accounted for using the equity method |  | 2,191,000 | 2,871,000 | 3,728,000
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax |  | 0 | 0 | 0
Share of other comprehensive income of associates and joint ventures accounted for using equity method, before tax |  | 2,191,000 | 2,871,000 | 3,728,000
Ajay Europe SARL |  |  |  |
Equity-accounted investees [Line Items] |  |  |  |
Investments accounted for using equity method | [1] | 7,875,000 | 7,451,000 | 7,845,000
Share in profit (loss) of associates and joint ventures accounted for using the equity method |  | 1,029,000 | 1,165,000 | 1,373,000
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax |  | 756,000 | (179,000) | (439,000)
Share of other comprehensive income of associates and joint ventures accounted for using equity method, before tax |  | 1,785,000 | 986,000 | 934,000
Charlee SQM Thailand Co, Ltd, |  |  |  |
Equity-accounted investees [Line Items] |  |  |  |
Investments accounted for using equity method | [1] | 0 | 0 | 0
Share in profit (loss) of associates and joint ventures accounted for using the equity method |  | 0 | 0 | 316,000
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax |  | 0 | 0 | 0
Share of other comprehensive income of associates and joint ventures accounted for using equity method, before tax |  | 0 | 0 | 316,000
SQM Eastmed Turkey |  |  |  |
Equity-accounted investees [Line Items] |  |  |  |
Investments accounted for using equity method | [1],[2] | 0 | 623,000 | 310,000
Share in profit (loss) of associates and joint ventures accounted for using the equity method | [2] | 247,000 | 354,000 | 370,000
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax | [2] | 0 | (42,000) | (21,000)
Share of other comprehensive income of associates and joint ventures accounted for using equity method, before tax | [2] | 247,000 | 312,000 | 349,000
Kore Potash Ltd |  |  |  |
Equity-accounted investees [Line Items] |  |  |  |
Investments accounted for using equity method | [1] | 26,175,000 | 24,739,000 | 20,467,000
Share in profit (loss) of associates and joint ventures accounted for using the equity method |  | (224,000) | (534,000) | (1,543,000)
Share of other comprehensive income of associates and joint ventures accounted for using equity method, net of tax |  | (374,000) | (549,000) | (1,206,000)
Share of other comprehensive income of associates and joint ventures accounted for using equity method, before tax |  | $ (598,000) | $ (1,083) | $ (2,749,000)
[1] | These investments include adjustments for unrealized results.
[2] | As of December 31, 2020, these investments no longer form part of the group. See Note 8.4 (a).

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- Definition The amount of investments accounted for using the equity method. The equity method is a method of accounting whereby the investment is initially recognised at cost and adjusted thereafter for the post-acquisition change in the investor's share of net assets of the investee. The investor's profit or loss includes its share of the profit or loss of the investee. The investor's other comprehensive income includes its share of the other comprehensive income of the investee. [Refer: At cost [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2020-01-01 -Paragraph 24 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2020-en-r&anchor=para_24_a&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2020-01-01 -Paragraph B16 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_B16&doctype=Appendix&subtype=B -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_e&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The entity's share of the other comprehensive income of associates and joint ventures accounted for using the equity method, net of tax. [Refer: Associates [member]; Investments accounted for using equity method; Joint ventures [member]; Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective on first application of IFRS 9 -Name IFRS -Number 4 -IssueDate 2020-01-01 -Paragraph 39M -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=4&code=ifrs-tx-2020-en-b&anchor=para_39M_b&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2020-01-01 -Paragraph B16 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2020-en-r&anchor=para_B16_c&doctype=Appendix&subtype=B -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 91 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_91_a&doctype=Standard -URIDate 2020-01-01 + Details
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- Definition The entity's share of the other comprehensive income of associates and joint ventures accounted for using the equity method, before tax. [Refer: Associates [member]; Investments accounted for using equity method; Joint ventures [member]; Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Effective on first application of IFRS 9 -Name IFRS -Number 4 -IssueDate 2020-01-01 -Paragraph 39M -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=4&code=ifrs-tx-2020-en-b&anchor=para_39M_b&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 91 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_91_b&doctype=Standard -URIDate 2020-01-01 + Details
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