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Financial instruments (Details 13) - USD ($) $ in Thousands | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 30, 2020 | Oct. 31, 2018
Financial instruments [Line Items] |  |  |  |
Tax ID No. | 77.114.779-8 | N/A |  |
Country |  | Chile |  |
Notional amount | $ 43,396 | $ 39,031 | $ 51,584 |
Current maturities | 43,396 | 39,031 |  |
Borrowing costs | (2,802) | (2,250) |  |
Total | 40,594 | 36,781 |  |
NotLaterThanThreeMonths [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Notional amount | 37,555 | 33,154 |  |
Current maturities | 37,555 | 33,154 |  |
LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Notional amount | $ 5,841 | 5,877 |  |
Current maturities |  | $ 5,877 |  |
Single series bond One [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Tax ID No. | 93.007.000-9 | 93.007.000-9 |  |
Company | SQM S.A. | SQM S.A. |  |
Country | Chile | Chile |  |
Number of registration or ID of the instrument | 0 | 0 |  |
Maturity date | 01/28/2022 | 01/28/2021 |  |
Currency or adjustment index | US$ | US$ |  |
Payment of interest | Semiannual | Semiannual |  |
Nominal rate | 4.38% | 4.38% |  |
Effective rate | 1.56% | 1.95% |  |
Repayment | Upon maturity | Upon maturity |  |
Notional amount | $ 4,648 | $ 4,648 |  |
Current maturities | 4,648 | 4,648 |  |
Borrowing costs | (433) | (433) |  |
Total | 4,215 | 4,215 |  |
Single series bond One [Member] | NotLaterThanThreeMonths [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Notional amount | 4,648 | 4,648 |  |
Current maturities | 4,648 | 4,648 |  |
Single series bond One [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Notional amount | 0 | 0 |  |
Current maturities | $ 0 | $ 0 |  |
Single series bond Two [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Tax ID No. | 93.007.000-9 | 93.007.000-9 |  |
Company | SQM S.A. | SQM S.A. |  |
Country | Chile | Chile |  |
Number of registration or ID of the instrument | 0 | 0 |  |
Maturity date | 04/03/2022 | 04/03/2021 |  |
Currency or adjustment index | US$ | US$ |  |
Payment of interest | Semiannual | Semiannual |  |
Nominal rate | 3.63% | 3.63% |  |
Effective rate | 0.74% | 1.08% |  |
Repayment | Upon maturity | Upon maturity |  |
Notional amount | $ 2,658 | $ 2,658 |  |
Current maturities | 2,658 | 2,658 |  |
Borrowing costs | (614) | (614) |  |
Total | 2,044 | 2,044 |  |
Single series bond Two [Member] | NotLaterThanThreeMonths [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Notional amount | 0 | 0 |  |
Current maturities | 0 | 0 |  |
Single series bond Two [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Notional amount | 2,658 | 2,658 |  |
Current maturities | $ 2,658 | $ 2,658 |  |
Single series bond Three [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Tax ID No. | 93.007.000-9 | 93.007.000-9 |  |
Company | SQM S.A. | SQM S.A. |  |
Country | Chile | Chile |  |
Number of registration or ID of the instrument | 0 | 0 |  |
Maturity date | 05/07/2022 | 05/07/2021 |  |
Currency or adjustment index | US$ | US$ |  |
Payment of interest | Semiannual | Semiannual |  |
Nominal rate | 4.25% | 4.25% |  |
Effective rate | 3.23% | 3.59% |  |
Repayment | Upon maturity | Upon maturity |  |
Notional amount | $ 2,869 | $ 7,508 |  |
Current maturities | 2,869 | 7,508 |  |
Borrowing costs | (679) | (679) |  |
Total | 2,190 | 6,829 |  |
Single series bond Three [Member] | NotLaterThanThreeMonths [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Notional amount | 0 | 7,508 |  |
Current maturities | 0 | 7,508 |  |
Single series bond Three [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Notional amount | 2,869 | 0 |  |
Current maturities | $ 2,869 | $ 0 |  |
Single Series Bond Four [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Tax ID No. | 93.007.000-9 | 93.007.000-9 |  |
Company | SQM S.A. | SQM S.A. |  |
Country | Chile | Chile |  |
Number of registration or ID of the instrument | 0 | 0 |  |
Maturity date | 01/22/2022 | 01/22/2021 |  |
Currency or adjustment index |  | US$ |  |
Payment of interest | Semiannual | Semiannual |  |
Nominal rate | 4.25% | 4.25% |  |
Effective rate | 4.00% | 4.17% |  |
Repayment | Upon maturity | Upon maturity |  |
Notional amount | $ 7,508 | $ 2,869 |  |
Current maturities | 7,508 | 2,869 |  |
Borrowing costs | (237) | (237) |  |
Total | 7,271 | 2,632 |  |
Single Series Bond Four [Member] | NotLaterThanThreeMonths [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Notional amount | 7,508 | 0 |  |
Current maturities | 7,508 | 0 |  |
Single Series Bond Four [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Notional amount | 0 | 2,869 |  |
Current maturities | $ 0 | $ 2,869 |  |
Single series bond Five [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Tax ID No. | 93.007.000-9 |  |  |
Company | SQM S.A. |  |  |
Country | Chile |  |  |
Number of registration or ID of the instrument | 0 |  |  |
Maturity date | 03/10/2022 |  |  |
Currency or adjustment index | US$ |  |  |
Nominal rate | 3.50% |  |  |
Effective rate | 3.62% |  |  |
Repayment | Upon maturity |  |  |
Notional amount | $ 6,874 |  |  |
Current maturities | 6,874 |  |  |
Borrowing costs | (552) |  |  |
Total | 6,322 |  |  |
Single series bond Five [Member] | NotLaterThanThreeMonths [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Notional amount | 6,874 |  |  |
Current maturities | 6,874 |  |  |
Single series bond Five [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Notional amount | 0 |  |  |
Current maturities | $ 0 |  |  |
Series H bonds [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Tax ID No. | 93.007.000-9 | 93.007.000-9 |  |
Company | SQM S.A. | SQM S.A. |  |
Country | Chile | Chile |  |
Number of registration or ID of the instrument | 564 | 564 |  |
Maturity date | 01/05/2022 | 01/05/2021 |  |
Currency or adjustment index | UF | UF |  |
Payment of interest | Semiannual | Semiannual |  |
Nominal rate | 4.90% | 4.90% |  |
Effective rate | 1.75% | 0.58% |  |
Repayment | Semiannual | Semiannual |  |
Notional amount | $ 16,026 | $ 18,212 |  |
Current maturities | 16,026 | 18,212 |  |
Borrowing costs | (172) | (172) |  |
Total | 15,854 | 18,040 |  |
Series H bonds [Member] | NotLaterThanThreeMonths [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Notional amount | 16,026 | 18,212 |  |
Current maturities | 16,026 | 18,212 |  |
Series H bonds [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Notional amount | 0 | 0 |  |
Current maturities | $ 0 | $ 0 |  |
Series O bonds [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Tax ID No. | 93.007.000-9 | 93.007.000-9 |  |
Company | SQM S.A. | SQM S.A. |  |
Country | Chile | Chile |  |
Number of registration or ID of the instrument | 699 | 699 |  |
Maturity date | 02/01/2022 | 02/01/2021 |  |
Currency or adjustment index | UF | UF |  |
Payment of interest | Semiannual | Semiannual |  |
Nominal rate | 3.80% | 3.80% |  |
Effective rate | 2.06% | 2.24% |  |
Repayment | Upon maturity | Upon maturity |  |
Notional amount | $ 863 | $ 962 |  |
Current maturities | 863 | 962 |  |
Borrowing costs | (82) | (82) |  |
Total | 781 | 880 |  |
Series O bonds [Member] | NotLaterThanThreeMonths [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Notional amount | 863 | 962 |  |
Current maturities | 863 | 962 |  |
Series O bonds [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Notional amount | 0 | 0 |  |
Current maturities | $ 0 | $ 0 |  |
Series P bonds [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Tax ID No. | 93.007.000-9 | 93.007.000-9 |  |
Company | SQM S.A. | SQM S.A. |  |
Country | Chile | Chile |  |
Number of registration or ID of the instrument | 563 | 563 |  |
Maturity date | 01/15/2022 | 01/15/2021 |  |
Currency or adjustment index | UF | UF |  |
Payment of interest | Semiannual | Semiannual |  |
Nominal rate | 3.25% | 3.25% |  |
Effective rate | 2.04% | 2.37% |  |
Repayment | Upon maturity | Upon maturity |  |
Notional amount | $ 1,636 | $ 1,824 |  |
Current maturities | 1,636 | 1,824 |  |
Borrowing costs | (12) | (12) |  |
Total | 1,624 | 1,812 |  |
Series P bonds [Member] | NotLaterThanThreeMonths [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Notional amount | 1,636 | 1,824 |  |
Current maturities | 1,636 | 1,824 |  |
Series P bonds [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Notional amount | 0 | 0 |  |
Current maturities | $ 0 | $ 0 |  |
Series Q bonds [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Tax ID No. | 93.007.000-9 | 93.007.000-9 |  |
Company | SQM S.A. | SQM S.A. |  |
Country | Chile | Chile |  |
Number of registration or ID of the instrument | 700 | 700 |  |
Maturity date | 06/01/2022 | 06/01/2021 |  |
Currency or adjustment index | UF |  |  |
Payment of interest | Semiannual | Semiannual |  |
Nominal rate | 3.45% | 3.45% |  |
Effective rate | 2.72% | 2.92% |  | 3.45%
Repayment | Upon maturity | Upon maturity |  |
Notional amount | $ 314 | $ 350 |  |
Current maturities | 314 | 350 |  |
Borrowing costs | (21) | (21) |  |
Total | 293 | 329 |  |
Series Q bonds [Member] | NotLaterThanThreeMonths [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Notional amount | 0 | 0 |  |
Current maturities | 0 | 0 |  |
Series Q bonds [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |
Financial instruments [Line Items] |  |  |  |
Notional amount | 314 | 350 |  |
Current maturities | $ 314 | $ 350 |  |

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