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Financial instruments - Reconciliation of Net Debt (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2023 | Dec. 31, 2022
Disclosure Of Detailed Information About Changes In Net Debt [Line Items] |  |
Net debt, beginning balance | $ (660,246) | $ 258,915
Amounts from loans | (1,537,295) | (235,412)
Amounts from interests | 20,495 | 59,315
Other cash (inflows)/outflows | (1,282,708) | 1,149,930
Income statement | (41,305) | (81,235)
Equity and others | 18,693 | 26,563
Net debt, ending balance | 2,161,874 | (660,246)
Obligations with the public and bank loans |  |
Disclosure Of Detailed Information About Changes In Net Debt [Line Items] |  |
Net debt, beginning balance | 2,848,875 | 2,555,511
Amounts from loans | (1,534,282) | (246,883)
Amounts from interests | 117,145 | 98,155
Other cash (inflows)/outflows | 18,346 | 2,566
Income statement | (168,598) | (147,202)
Equity and others | 0 | 0
Net debt, ending balance | 4,416,264 | 2,848,875
Financial instruments derived from hedging |  |
Disclosure Of Detailed Information About Changes In Net Debt [Line Items] |  |
Net debt, beginning balance | 39,681 |
Amounts from loans | (18,927) |
Amounts from interests | 4,077 |
Other cash (inflows)/outflows | 0 |
Income statement | 11,731 |
Equity and others | 20,800 |
Net debt, ending balance | 22,000 | 39,681
Derivatives for investment hedges |  |
Disclosure Of Detailed Information About Changes In Net Debt [Line Items] |  |
Net debt, beginning balance | 29,984 |
Amounts from loans | 0 |
Amounts from interests | 0 |
Other cash (inflows)/outflows | (10,082) |
Income statement | 18,171 |
Equity and others | 3,595 |
Net debt, ending balance | 18,300 | 29,984
Non-hedging derivatives on other financial liabilities |  |
Disclosure Of Detailed Information About Changes In Net Debt [Line Items] |  |
Net debt, beginning balance | 5,816 | 1,672
Amounts from loans | 0 | 0
Amounts from interests | 0 | 0
Other cash (inflows)/outflows | 0 | 0
Income statement | (8,979) | (4,144)
Equity and others | 0 | 0
Net debt, ending balance | 14,795 | 5,816
Current and non-current lease liabilities |  |
Disclosure Of Detailed Information About Changes In Net Debt [Line Items] |  |
Net debt, beginning balance | 61,734 |
Amounts from loans | 15,914 |
Amounts from interests | 2,038 |
Other cash (inflows)/outflows | 0 |
Income statement | (31,376) |
Equity and others | 0 |
Net debt, ending balance | 75,158 | 61,734
Current and non-current financial liabilities |  |
Disclosure Of Detailed Information About Changes In Net Debt [Line Items] |  |
Net debt, beginning balance | 2,986,090 | 2,693,260
Amounts from loans | (1,537,295) | (235,412)
Amounts from interests | 123,260 | 107,004
Other cash (inflows)/outflows | 8,264 | (96)
Income statement | (179,051) | (185,772)
Equity and others | 24,395 | 21,446
Net debt, ending balance | 4,546,517 | 2,986,090
Cash and cash equivalents |  |
Disclosure Of Detailed Information About Changes In Net Debt [Line Items] |  |
Net debt, beginning balance | (2,655,236) | (1,515,051)
Amounts from loans | 0 | 0
Amounts from interests | (53,539) | (25,623)
Other cash (inflows)/outflows | (1,615,863) | 1,165,225
Income statement | 55,535 | 583
Equity and others | 0 | 0
Net debt, ending balance | (1,041,369) | (2,655,236)
Deposits that do not qualify as cash and cash equivalents |  |
Disclosure Of Detailed Information About Changes In Net Debt [Line Items] |  |
Net debt, beginning balance | (950,167) | (905,170)
Amounts from loans | 0 | 0
Amounts from interests | (49,226) | (24,088)
Other cash (inflows)/outflows | 341,742 | 24,679
Income statement | 74,114 | 44,406
Equity and others | 0 | 0
Net debt, ending balance | (1,316,797) | (950,167)
Debt hedging derivative financial instruments |  |
Disclosure Of Detailed Information About Changes In Net Debt [Line Items] |  |
Net debt, beginning balance | (29,620) | (257)
Amounts from loans | 0 | 0
Amounts from interests | 0 | 0
Other cash (inflows)/outflows | 0 | 0
Income statement | (5,100) | 29,363
Equity and others | 0 | 0
Net debt, ending balance | (24,520) | (29,620)
Derivatives for investment hedges |  |
Disclosure Of Detailed Information About Changes In Net Debt [Line Items] |  |
Net debt, beginning balance | 0 |
Amounts from loans | 0 |
Amounts from interests | 0 |
Other cash (inflows)/outflows | 0 |
Income statement | 0 |
Equity and others | 0 |
Net debt, ending balance | 0 | 0
Non-hedging derivatives on other financial assets |  |
Disclosure Of Detailed Information About Changes In Net Debt [Line Items] |  |
Net debt, beginning balance | (4,174) |
Amounts from loans | 0 |
Amounts from interests | 0 |
Other cash (inflows)/outflows | (18,034) |
Income statement | 14,380 |
Equity and others | 0 |
Net debt, ending balance | (520) | (4,174)
Hedging derivatives reimbursement of SQM Australia asset |  |
Disclosure Of Detailed Information About Changes In Net Debt [Line Items] |  |
Net debt, beginning balance | (7,139) |
Amounts from loans | 0 |
Amounts from interests | 0 |
Other cash (inflows)/outflows | 1,183 |
Income statement | (1,183) |
Equity and others | (5,702) |
Net debt, ending balance | (1,437) | (7,139)
Debt hedging derivative financial instruments |  |
Disclosure Of Detailed Information About Changes In Net Debt [Line Items] |  |
Net debt, beginning balance | 39,681 | 81,854
Amounts from loans |  | 993
Amounts from interests |  | 7,623
Other cash (inflows)/outflows |  | 0
Income statement |  | 6,108
Equity and others |  | 27,449
Net debt, ending balance |  | 39,681
Hedging and investment derivatives |  |
Disclosure Of Detailed Information About Changes In Net Debt [Line Items] |  |
Net debt, beginning balance | 29,984 | 0
Amounts from loans |  | 0
Amounts from interests |  | 0
Other cash (inflows)/outflows |  | (2,662)
Income statement |  | (21,319)
Equity and others |  | (6,003)
Net debt, ending balance |  | 29,984
Operating lease liabilities, current and non-current |  |
Disclosure Of Detailed Information About Changes In Net Debt [Line Items] |  |
Net debt, beginning balance | 61,734 | 54,223
Amounts from loans |  | 10,478
Amounts from interests |  | 1,226
Other cash (inflows)/outflows |  | 0
Income statement |  | (19,215)
Equity and others |  | 0
Net debt, ending balance |  | 61,734
Hedging and investment derivatives |  |
Disclosure Of Detailed Information About Changes In Net Debt [Line Items] |  |
Net debt, beginning balance | 0 | (12,613)
Amounts from loans |  | 0
Amounts from interests |  | 0
Other cash (inflows)/outflows |  | 0
Income statement |  | (12,613)
Equity and others |  | 0
Net debt, ending balance |  | 0
Non-hedging derivatives on other financial assets |  |
Disclosure Of Detailed Information About Changes In Net Debt [Line Items] |  |
Net debt, beginning balance | (4,174) | (1,254)
Amounts from loans |  | 0
Amounts from interests |  | 0
Other cash (inflows)/outflows |  | (39,878)
Income statement |  | 42,798
Equity and others |  | 0
Net debt, ending balance |  | (4,174)
Hedging derivatives reimbursement of SQM Australia asset |  |
Disclosure Of Detailed Information About Changes In Net Debt [Line Items] |  |
Net debt, beginning balance | (7,139) | 0
Amounts from loans |  | 0
Amounts from interests |  | 2,022
Other cash (inflows)/outflows |  | 0
Income statement |  | 0
Equity and others |  | 5,117
Net debt, ending balance |  | (7,139)
Current and Non-Current Financial Assets |  |
Disclosure Of Detailed Information About Changes In Net Debt [Line Items] |  |
Net debt, beginning balance | (3,646,336) | (2,434,345)
Amounts from loans | 0 | 0
Amounts from interests | (102,765) | (47,689)
Other cash (inflows)/outflows | (1,290,972) | 1,150,026
Income statement | 137,746 | 104,537
Equity and others | (5,702) | 5,117
Net debt, ending balance | $ (2,384,643) | $ (3,646,336)

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