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Contingencies and restrictions - Tax Contingencies (Details) |  |  |  |  |  |  |  |  |  | 12 Months Ended
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Dec. 19, 2024 USD ($) | Aug. 14, 2024 USD ($) | Apr. 05, 2024 USD ($) | Jan. 19, 2024 USD ($) | Jun. 30, 2023 USD ($) | Jul. 15, 2021 USD ($) | Apr. 30, 2019 USD ($) | Mar. 24, 2017 USD ($) | Aug. 26, 2016 USD ($) | Dec. 31, 2024 USD ($) tax_claim | Dec. 31, 2023 USD ($)
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |
Mining assets |  |  |  |  |  |  |  |  |  | $ 162,074,000 | $ 154,715,000
SQM Salar | Non-current tax assets |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |
Mining assets |  |  |  |  |  |  |  |  |  | 59,500,000 | 59,500,000
Chilean Internal Revenue Service (IRS) | SQM Salar | Pending Litigation Claims |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |
Adjustment to tax expense (income) |  |  | $ 1,106,200,000 |  |  |  |  |  |  |  |
First Tax And Customs Court | SQM Salar | Disallowed Donation Expense Under Article 21 |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |
Tax contingencies, dispute amount |  |  |  |  |  |  |  |  |  | 319,400 |
Fourth Tax And Customs Court | SQM Salar | Disallowed Donation Expense Under Article 21 |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |
Tax contingencies, dispute amount |  |  |  |  |  |  |  |  |  | 209,100 |
Santiago Metropolitan Region First Tax And Customs Court | Disallowed Donation Expense Under Article 21 |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |
Tax contingencies, dispute amount |  |  |  |  |  |  |  |  |  | 511,000 |
Santiago Metropolitan Region First Tax And Customs Court | SQM Nitratos | Disallowed Donation Expense Under Article 21 |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |
Tax contingencies, dispute amount |  |  |  |  |  |  |  |  |  | $ 319,400,000 |
Tax Periods 2012 to 2023 | Chilean Internal Revenue Service (IRS) | SQM Salar |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |
Tax contingencies, dispute amount |  |  |  |  |  |  |  |  |  |  | 986,300,000
Number of tax claims | tax_claim |  |  |  |  |  |  |  |  |  | 7 |
Tax contingencies, assessed excess tax amount |  |  |  |  |  |  |  |  |  |  | 59,500,000
Tax contingencies, contested tax |  |  |  |  |  |  |  |  |  |  | 818,000,000
Interest and associated fines |  |  |  |  |  |  |  |  |  |  | $ 108,800,000
Tax Periods 2011 To 2022 | Chilean Internal Revenue Service (IRS) | SQM Salar | Pending Litigation Claims |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |
Adjustment to tax expense (income) |  |  | 926,700,000 |  |  |  |  |  |  |  |
Tax Period 2023 | Chilean Internal Revenue Service (IRS) |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |
Tax contingencies, dispute amount |  | $ 785,000 |  |  |  |  |  |  |  |  |
Tax contingencies, assessed excess tax amount |  | 10,900,000 |  |  |  |  |  |  |  |  |
Tax contingencies, contested tax |  | 691,100 |  |  |  |  |  |  |  |  |
Interest and associated fines |  | $ 83,000 |  |  |  |  |  |  |  |  |
Tax Period 2023 | Chilean Internal Revenue Service (IRS) | SQM Salar | Pending Litigation Claims |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |
Adjustment to tax expense (income) |  |  | 162,800,000 |  |  |  |  |  |  |  |
Tax Period 2024 | Chilean Internal Revenue Service (IRS) | SQM Salar | Pending Litigation Claims |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |
Adjustment to tax expense (income) |  |  | $ 16,700,000 |  |  |  |  |  |  |  |
Tax Period 2012 to 2014 | Third tax and customs court |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |
Tax contingencies, dispute amount |  |  |  |  |  |  |  |  | $ 17,800,000 |  |
Tax contingencies, contested tax |  |  |  |  |  |  |  |  | 11,500,000 |  |
Interest and associated fines |  |  |  |  |  |  |  |  | $ 6,300,000 |  |
Tax Period 2015 | Third tax and customs court |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |
Tax contingencies, dispute amount |  |  |  |  |  |  |  | $ 3,200,000 |  |  |
Tax Period 2016 | Third tax and customs court |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |
Tax contingencies, dispute amount |  |  |  |  |  |  |  | 5,500 |  |  |
Tax Period 2016 | First Tax And Customs Court |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |
Tax contingencies, dispute amount |  |  |  |  |  |  | $ 3,800,000 |  |  |  |
Tax Period 2015 to 2016 | Third tax and customs court |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |
Tax contingencies, assessed excess tax amount |  |  |  |  |  |  |  | 1,200 |  |  |
Tax contingencies, contested tax |  |  |  |  |  |  |  | 3,800 |  |  |
Interest and associated fines |  |  |  |  |  |  |  | $ 500 |  |  |
Tax Period 2017 to 2018 | Third tax and customs court |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |
Tax contingencies, dispute amount |  |  |  |  |  | $ 63,900,000 |  |  |  |  |
Tax contingencies, assessed excess tax amount |  |  |  |  |  | 17,600,000 |  |  |  |  |
Tax contingencies, contested tax |  |  |  |  |  | 30,200,000 |  |  |  |  |
Interest and associated fines |  |  |  |  |  | $ 16,100,000 |  |  |  |  |
Tax Period 2019 | First Tax And Customs Court |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |
Tax contingencies, dispute amount |  |  |  |  | $ 36,700,000 |  |  |  |  |  |
Tax contingencies, assessed excess tax amount |  |  |  |  | 9,700,000 |  |  |  |  |  |
Tax contingencies, contested tax |  |  |  |  | $ 27,000,000 |  |  |  |  |  |
Tax Periods 2020 And 2021 | First Tax And Customs Court | Entering into significant commitments or contingent liabilities |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |
Tax contingencies, dispute amount |  |  |  | $ 20,700,000 |  |  |  |  |  |  |
Tax contingencies, assessed excess tax amount |  |  |  | 5,600,000 |  |  |  |  |  |  |
Tax contingencies, contested tax |  |  |  | 15,100,000 |  |  |  |  |  |  |
Tax Period 2022 | Third tax and customs court | Entering into significant commitments or contingent liabilities |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |
Tax contingencies, dispute amount |  |  |  | 53,500,000 |  |  |  |  |  |  |
Tax contingencies, assessed excess tax amount |  |  |  | 14,400,000 |  |  |  |  |  |  |
Tax contingencies, contested tax |  |  |  | 36,100,000 |  |  |  |  |  |  |
Interest and associated fines |  |  |  | $ 3,000,000 |  |  |  |  |  |  |
Tax Periods 2023 And 2024 | Chilean Internal Revenue Service (IRS) | Tax contingent liability |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |
Law suits fines penalties and damages payable |  |  |  |  |  |  |  |  |  | $ 179,400,000 |
Tax Period January To September 2024 | Chilean Internal Revenue Service (IRS) |  |  |  |  |  |  |  |  |  |  |
Disclosure of contingent liabilities [line items] |  |  |  |  |  |  |  |  |  |  |
Tax contingencies, dispute amount | $ 78,300 |  |  |  |  |  |  |  |  |  |
Interest and associated fines | $ 25,300 |  |  |  |  |  |  |  |  |  |

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