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Financial instruments (Details 12) |  |  |  | 1 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Apr. 03, 2013 USD ($) | Apr. 04, 2012 USD ($) | Jan. 13, 2009 USD ($) | Oct. 23, 2014 USD ($) | Apr. 21, 2010 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 USD ($) | Apr. 05, 2018 | Apr. 04, 2012 CLF ( ) | Jan. 13, 2009 CLF ( ) | Jan. 24, 2006 USD ($) | Jan. 24, 2006 CLF ( )
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Effective rate |  |  |  |  |  |  |  | 3.25% |  |  |  |
Notional amount |  |  |  |  |  | $ 290,397,000 | $ 95,623,000 |  |  |  |  |
Current maturities |  |  |  |  |  | 15,133,000 |  |  |  |  |  |
Bond issuance costs |  |  |  |  |  | (1,639,000) | (9,886,000) |  |  |  |  |
Total |  |  |  |  |  | 13,494,000 | 58,973,000 |  |  |  |  |
NotLaterThanThreeMonths [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  | 0 |  |  |  |  |  |
Current maturities |  |  |  |  |  | 9,801,000 |  |  |  |  |  |
LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  | 0 |  |  |  |  |  |
Current maturities |  |  |  |  |  | $ 5,332,000 |  |  |  |  |  |
Single series bond One [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Tax ID No. |  |  |  |  |  | 93,007,000-9 |  |  |  |  |  |
Company |  |  |  |  |  | SQM S.A. |  |  |  |  |  |
País |  |  |  |  |  | Chile |  |  |  |  |  |
Number of registration or ID of the instrument |  |  |  |  |  | - |  |  |  |  |  |
Maturity date |  |  |  |  |  | 04/21/2018 |  |  |  |  |  |
Currency or adjustment index |  |  |  |  |  | US$ |  |  |  |  |  |
Payment of interest |  |  |  |  |  | Semiannual |  |  |  |  |  |
Nominal rate |  |  |  |  |  | 5.50% |  |  |  |  |  |
Effective rate |  |  |  |  |  | 1.47% |  |  |  |  |  |
Repayment |  |  |  |  |  | Upon maturity |  |  |  |  |  |
Notional amount |  |  |  |  |  | $ 0 | 0 |  |  |  |  |
Current maturities |  |  |  |  |  | 2,674,000 |  |  |  |  |  |
Bond issuance costs |  |  |  |  |  | (385,000) | (904,000) |  |  |  |  |
Total |  |  |  |  |  | 2,289,000 | 2,288,000 |  |  |  |  |
Single series bond One [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  | 0 |  |  |  |  |  |
Current maturities |  |  |  |  |  | 0 |  |  |  |  |  |
Single series bond One [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  | 0 |  |  |  |  |  |
Current maturities |  |  |  |  |  | $ 2,674,000 |  |  |  |  |  |
Single series bond Two [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Tax ID No. |  |  |  |  |  | 93,007,000-9 |  |  |  |  |  |
Company |  |  |  |  |  | SQM S.A. |  |  |  |  |  |
País |  |  |  |  |  | Chile |  |  |  |  |  |
Number of registration or ID of the instrument |  |  |  |  |  | - |  |  |  |  |  |
Maturity date |  |  |  |  |  | 01/28/2018 |  |  |  |  |  |
Currency or adjustment index |  |  |  |  |  | US$ |  |  |  |  |  |
Payment of interest |  |  |  |  |  | Semiannual |  |  |  |  |  |
Nominal rate |  |  |  |  |  | 4.38% |  |  |  |  |  |
Effective rate |  |  |  |  |  | 3.17% |  |  |  |  |  |
Repayment |  |  |  |  |  | Upon maturity |  |  |  |  |  |
Notional amount |  |  |  |  |  | $ 0 | 0 |  |  |  |  |
Current maturities |  |  |  |  |  | 4,648,000 |  |  |  |  |  |
Bond issuance costs |  |  |  |  |  | (433,000) | (3,069,000) |  |  |  |  |
Total |  |  |  |  |  | 4,215,000 | 4,216,000 |  |  |  |  |
Single series bond Two [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  | 0 |  |  |  |  |  |
Current maturities |  |  |  |  |  | 4,648,000 |  |  |  |  |  |
Single series bond Two [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  | 0 |  |  |  |  |  |
Current maturities |  |  |  |  |  | $ 0 |  |  |  |  |  |
Single series bond Three [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Tax ID No. |  |  |  |  |  | 93,007,000-9 |  |  |  |  |  |
Company |  |  |  |  |  | SQM S.A. |  |  |  |  |  |
País |  |  |  |  |  | Chile |  |  |  |  |  |
Number of registration or ID of the instrument |  |  |  |  |  | - |  |  |  |  |  |
Maturity date |  |  |  |  |  | 0403//2018 |  |  |  |  |  |
Currency or adjustment index |  |  |  |  |  | US$ |  |  |  |  |  |
Payment of interest |  |  |  |  |  | Semiannual |  |  |  |  |  |
Nominal rate |  |  |  |  |  | 3.63% |  |  |  |  |  |
Effective rate |  |  |  |  |  | 2.12% |  |  |  |  |  |
Repayment |  |  |  |  |  | Upon maturity |  |  |  |  |  |
Notional amount |  |  |  |  |  | $ 0 | 0 |  |  |  |  |
Current maturities |  |  |  |  |  | 2,658,000 |  |  |  |  |  |
Bond issuance costs |  |  |  |  |  | (615,000) | (3,230,000) |  |  |  |  |
Total |  |  |  |  |  | 2,043,000 | 2,043,000 |  |  |  |  |
Single series bond Three [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  | 0 |  |  |  |  |  |
Current maturities |  |  |  |  |  | 0 |  |  |  |  |  |
Single series bond Three [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  | 0 |  |  |  |  |  |
Current maturities |  |  |  |  |  | $ 2,658,000 |  |  |  |  |  |
Series H bonds [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Tax ID No. |  |  |  |  |  | 93,007,000-9 |  |  |  |  |  |
Company |  |  |  |  |  | SQM S.A. |  |  |  |  |  |
País |  |  |  |  |  | Chile |  |  |  |  |  |
Number of registration or ID of the instrument |  |  |  |  |  | 564 |  |  |  |  |  |
Maturity date |  |  |  |  |  | 01/05/2018 |  |  |  |  |  |
Currency or adjustment index |  |  |  |  |  | UF |  |  |  |  |  |
Payment of interest |  |  |  |  |  | Semiannual |  |  |  |  |  |
Nominal rate |  |  |  |  |  | 4.90% |  |  |  |  |  |
Effective rate |  |  |  |  |  | 2.18% |  |  |  |  |  |
Repayment |  |  |  |  |  | Semiannual |  |  |  |  |  |
Notional amount |  |  |  |  |  | $ 0 | 0 |  |  |  |  |
Current maturities |  |  |  |  |  | 4,127,000 |  |  |  |  |  |
Bond issuance costs |  |  |  |  |  | (139,000) | (1,671,000) |  |  |  |  |
Total |  |  |  |  |  | 3,988,000 | 3,587,000 |  |  |  |  |
Series H bonds [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  | 0 |  |  |  |  |  |
Current maturities |  |  |  |  |  | 4,127,000 |  |  |  |  |  |
Series H bonds [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  | 0 |  |  |  |  |  |
Current maturities |  |  |  |  |  | $ 0 |  |  |  |  |  |
Series O bonds [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Tax ID No. |  |  |  |  |  | 93,007,000-9 |  |  |  |  |  |
Company |  |  |  |  |  | SQM S.A. |  |  |  |  |  |
País |  |  |  |  |  | Chile |  |  |  |  |  |
Number of registration or ID of the instrument |  |  |  |  |  | 699 |  |  |  |  |  |
Maturity date |  |  |  |  |  | 02/01/2018 |  |  |  |  |  |
Currency or adjustment index |  |  |  |  |  | UF |  |  |  |  |  |
Payment of interest |  |  |  |  |  | Semiannual |  |  |  |  |  |
Nominal rate |  |  |  |  |  | 3.80% |  |  |  |  |  |
Effective rate |  |  |  |  |  | 2.80% |  |  |  |  |  |
Repayment |  |  |  |  |  | Upon maturity |  |  |  |  |  |
Notional amount |  |  |  |  |  | $ 0 | 0 |  |  |  |  |
Current maturities |  |  |  |  |  | 1,026,000 |  |  |  |  |  |
Bond issuance costs |  |  |  |  |  | (67,000) | (1,012,000) |  |  |  |  |
Total |  |  |  |  |  | 959,000 | 859,000 |  |  |  |  |
Series O bonds [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  | 0 |  |  |  |  |  |
Current maturities |  |  |  |  |  | 1,026,000 |  |  |  |  |  |
Series O bonds [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  | 0 |  |  |  |  |  |
Current maturities |  |  |  |  |  | 0 |  |  |  |  |  |
Series C bonds [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | 5,903,000 |  |  |  |  |
Bond issuance costs |  |  |  |  |  |  | 0 |  |  |  |  |
Total |  |  |  |  |  |  | 6,098,000 |  |  |  |  |
Series M bonds [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | 39,356,000 |  |  |  |  |
Total |  |  |  |  |  |  | 39,882,000 |  |  |  |  |
Current bonds issued [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Current maturities |  |  |  |  |  |  | 60,624,000 |  |  |  |  |
Bond issuance costs |  |  |  |  |  |  | (1,651,000) |  |  |  |  |
Current bonds issued [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | 39,356,000 |  |  |  |  |
Current maturities |  |  |  |  |  |  | 49,194,000 |  |  |  |  |
Current bonds issued [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | 5,903,000 |  |  |  |  |
Current maturities |  |  |  |  |  |  | $ 11,430,000 |  |  |  |  |
Current bonds issued [Member] | Single series bond One [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Tax ID No. |  |  |  |  |  |  | 93,007,000-9 |  |  |  |  |
Company |  |  |  |  |  |  | SQM S.A. |  |  |  |  |
País |  |  |  |  |  |  | Chile |  |  |  |  |
Number of registration or ID of the instrument |  |  |  |  |  |  | - |  |  |  |  |
Maturity date |  |  |  |  |  |  | 10/21/2016 |  |  |  |  |
Currency or adjustment index |  |  |  |  |  |  | US$ |  |  |  |  |
Payment of interest |  |  |  |  |  |  | Semiannual |  |  |  |  |
Nominal rate |  |  |  |  |  |  | 5.50% |  |  |  |  |
Effective rate |  |  |  |  |  |  | 1.97% |  |  |  |  |
Repayment |  |  |  |  |  |  | Upon maturity |  |  |  |  |
Notional amount |  |  |  |  |  | 250,000,000 | $ 250,000,000 |  |  |  |  |
Current maturities |  |  |  |  |  |  | 2,674,000 |  |  |  |  |
Bond issuance costs |  |  |  |  |  |  | (386,000) |  |  |  |  |
Current bonds issued [Member] | Single series bond One [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | 0 |  |  |  |  |
Current maturities |  |  |  |  |  |  | 0 |  |  |  |  |
Current bonds issued [Member] | Single series bond One [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | 0 |  |  |  |  |
Current maturities |  |  |  |  |  |  | $ 2,674,000 |  |  |  |  |
Current bonds issued [Member] | Single series bond Two [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Tax ID No. |  |  |  |  |  |  | 93,007,000-9 |  |  |  |  |
Company |  |  |  |  |  |  | SQM S.A. |  |  |  |  |
País |  |  |  |  |  |  | Chile |  |  |  |  |
Number of registration or ID of the instrument |  |  |  |  |  |  | - |  |  |  |  |
Maturity date |  |  |  |  |  |  | 01/28/2017 |  |  |  |  |
Currency or adjustment index |  |  |  |  |  |  | US$ |  |  |  |  |
Payment of interest |  |  |  |  |  |  | Semiannual |  |  |  |  |
Nominal rate |  |  |  |  |  |  | 4.38% |  |  |  |  |
Effective rate |  |  |  |  |  |  | 3.61% |  |  |  |  |
Repayment |  |  |  |  |  |  | Upon maturity |  |  |  |  |
Notional amount |  |  |  |  |  | 250,000,000 | $ 250,000,000 |  |  |  |  |
Current maturities |  |  |  |  |  |  | 4,649,000 |  |  |  |  |
Bond issuance costs |  |  |  |  |  |  | (433,000) |  |  |  |  |
Current bonds issued [Member] | Single series bond Two [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | 0 |  |  |  |  |
Current maturities |  |  |  |  |  |  | 4,649,000 |  |  |  |  |
Current bonds issued [Member] | Single series bond Two [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | 0 |  |  |  |  |
Current maturities |  |  |  |  |  |  | $ 0 |  |  |  |  |
Current bonds issued [Member] | Single series bond Three [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Tax ID No. |  |  |  |  |  |  | 93,007,000-9 |  |  |  |  |
Company |  |  |  |  |  |  | SQM S.A. |  |  |  |  |
País |  |  |  |  |  |  | Chile |  |  |  |  |
Number of registration or ID of the instrument |  |  |  |  |  |  | - |  |  |  |  |
Maturity date |  |  |  |  |  |  | 10/03/2016 |  |  |  |  |
Currency or adjustment index |  |  |  |  |  |  | US$ |  |  |  |  |
Payment of interest |  |  |  |  |  |  | Semiannual |  |  |  |  |
Nominal rate |  |  |  |  |  |  | 3.63% |  |  |  |  |
Effective rate |  |  |  |  |  |  | 2.48% |  |  |  |  |
Repayment |  |  |  |  |  |  | Upon maturity |  |  |  |  |
Notional amount |  |  |  |  |  | $ 300,000,000 | $ 300,000,000 |  |  |  |  |
Current maturities |  |  |  |  |  |  | 2,658,000 |  |  |  |  |
Bond issuance costs |  |  |  |  |  |  | (615,000) |  |  |  |  |
Current bonds issued [Member] | Single series bond Three [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | 0 |  |  |  |  |
Current maturities |  |  |  |  |  |  | 0 |  |  |  |  |
Current bonds issued [Member] | Single series bond Three [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | 0 |  |  |  |  |
Current maturities |  |  |  |  |  |  | $ 2,658,000 |  |  |  |  |
Current bonds issued [Member] | Series H bonds [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Tax ID No. |  |  |  |  |  |  | 93,007,000-9 |  |  |  |  |
Company |  |  |  |  |  |  | SQM S.A. |  |  |  |  |
País |  |  |  |  |  |  | Chile |  |  |  |  |
Number of registration or ID of the instrument |  |  |  |  |  |  | 564 |  |  |  |  |
Maturity date |  |  |  |  |  |  | 01/05/2017 |  |  |  |  |
Currency or adjustment index |  |  |  |  |  |  | UF |  |  |  |  |
Payment of interest |  |  |  |  |  |  | Semiannual |  |  |  |  |
Nominal rate |  |  |  |  |  |  | 4.90% |  |  |  |  |
Effective rate |  |  |  |  |  |  | 2.47% |  |  |  |  |
Repayment |  |  |  |  |  |  | Semiannual |  |  |  |  |
Current maturities |  |  |  |  |  |  | $ 3,726,000 |  |  |  |  |
Bond issuance costs |  |  |  |  |  |  | (139,000) |  |  |  |  |
Current bonds issued [Member] | Series H bonds [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | 0 |  |  |  |  |
Current maturities |  |  |  |  |  |  | 3,726,000 |  |  |  |  |
Current bonds issued [Member] | Series H bonds [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | 0 |  |  |  |  |
Current maturities |  |  |  |  |  |  | $ 0 |  |  |  |  |
Current bonds issued [Member] | Series O bonds [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Tax ID No. |  |  |  |  |  |  | 93,007,000-9 |  |  |  |  |
Company |  |  |  |  |  |  | SQM S.A. |  |  |  |  |
País |  |  |  |  |  |  | Chile |  |  |  |  |
Number of registration or ID of the instrument |  |  |  |  |  |  | 699 |  |  |  |  |
Maturity date |  |  |  |  |  |  | 02/01/2017 |  |  |  |  |
Currency or adjustment index |  |  |  |  |  |  | UF |  |  |  |  |
Payment of interest |  |  |  |  |  |  | Semiannual |  |  |  |  |
Nominal rate |  |  |  |  |  |  | 3.80% |  |  |  |  |
Effective rate |  |  |  |  |  |  | 3.00% |  |  |  |  |
Repayment |  |  |  |  |  |  | Upon maturity |  |  |  |  |
Current maturities |  |  |  |  |  |  | $ 926,000 |  |  |  |  |
Bond issuance costs |  |  |  |  |  |  | (67,000) |  |  |  |  |
Current bonds issued [Member] | Series O bonds [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | 0 |  |  |  |  |
Current maturities |  |  |  |  |  |  | 926,000 |  |  |  |  |
Current bonds issued [Member] | Series O bonds [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | 0 |  |  |  |  |
Current maturities |  |  |  |  |  |  | $ 0 |  |  |  |  |
Current bonds issued [Member] | Series C bonds [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Tax ID No. |  |  |  |  |  |  | 93,007,000-9 |  |  |  |  |
Company |  |  |  |  |  |  | SQM S.A. |  |  |  |  |
País |  |  |  |  |  |  | Chile |  |  |  |  |
Number of registration or ID of the instrument |  |  |  |  |  |  | 446 |  |  |  |  |
Maturity date |  |  |  |  |  |  | 12/01/2016 |  |  |  |  |
Currency or adjustment index |  |  |  |  |  |  | UF |  |  |  |  |
Payment of interest |  |  |  |  |  |  | Semiannual |  |  |  |  |
Nominal rate |  |  |  |  |  |  | 4.00% |  |  |  |  |
Effective rate |  |  |  |  |  |  | 1.34% |  |  |  |  |
Repayment |  |  |  |  |  |  | Semiannual |  |  |  |  |
Current maturities |  |  |  |  |  |  | $ 6,098,000 |  |  |  |  |
Bond issuance costs |  |  |  |  |  |  | 0 |  |  |  |  |
Current bonds issued [Member] | Series C bonds [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | 0 |  |  |  |  |
Current maturities |  |  |  |  |  |  | 0 |  |  |  |  |
Current bonds issued [Member] | Series C bonds [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | 5,903,000 |  |  |  |  |
Current maturities |  |  |  |  |  |  | $ 6,098,000 |  |  |  |  |
Current bonds issued [Member] | Series M bonds [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Tax ID No. |  |  |  |  |  |  | 93,007,000-9 |  |  |  |  |
Company |  |  |  |  |  |  | SQM S.A. |  |  |  |  |
País |  |  |  |  |  |  | Chile |  |  |  |  |
Number of registration or ID of the instrument |  |  |  |  |  |  | 700 |  |  |  |  |
Maturity date |  |  |  |  |  |  | 02/01/2017 |  |  |  |  |
Currency or adjustment index |  |  |  |  |  |  | UF |  |  |  |  |
Payment of interest |  |  |  |  |  |  | Semiannual |  |  |  |  |
Nominal rate |  |  |  |  |  |  | 3.30% |  |  |  |  |
Effective rate |  |  |  |  |  |  | 0.69% |  |  |  |  |
Repayment |  |  |  |  |  |  | Upon maturity |  |  |  |  |
Current maturities |  |  |  |  |  |  | $ 39,893,000 |  |  |  |  |
Bond issuance costs |  |  |  |  |  |  | (11,000) |  |  |  |  |
Current bonds issued [Member] | Series M bonds [Member] | NotLaterThanThreeMonths [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | 39,356,000 |  |  |  |  |
Current maturities |  |  |  |  |  |  | 39,893,000 |  |  |  |  |
Current bonds issued [Member] | Series M bonds [Member] | LaterThanThreeMonthsAndNotLaterThanOneYear [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  |  | 0 |  |  |  |  |
Current maturities |  |  |  |  |  |  | $ 0 |  |  |  |  |
Bonds issued [Member] | Single series bond One [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Maturity date |  |  |  |  | 10 |  |  |  |  |  |  |
Effective rate |  |  |  |  | 5.50% |  |  |  |  |  |  |
Notional amount |  |  |  |  | $ 250,000,000 |  |  |  |  |  |  |
Bonds issued [Member] | Single series bond Two [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Maturity date |  |  |  | 2025 |  |  |  |  |  |  |  |
Effective rate |  |  |  | 4.375% |  |  |  |  |  |  |  |
Notional amount |  |  |  | $ 250,000,000 |  |  |  |  |  |  |  |
Bonds issued [Member] | Single series bond Three [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Maturity date | 10 |  |  |  |  |  |  |  |  |  |  |
Effective rate | 3.625% |  |  |  |  |  |  |  |  |  |  |
Notional amount | $ 300,000 |  |  |  |  |  |  |  |  |  |  |
Bonds issued [Member] | Series H bonds [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Maturity date |  |  | 21 |  |  |  |  |  |  |  |  |
Effective rate |  |  | 4.90% |  |  |  |  |  |  | 4.90% |  |
Notional amount |  |  | $ 139,216,000 |  |  |  |  |  |  | 4,000,000 |  |
Bonds issued [Member] | Series O bonds [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Maturity date |  | 21 |  |  |  |  |  |  |  |  |  |
Effective rate |  | 3.80% |  |  |  |  |  |  | 3.80% |  |  |
Notional amount |  | $ 69,901 |  |  |  |  |  |  | 1,500,000 |  |  |
Bonds issued [Member] | Series C bonds [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Effective rate |  |  |  |  |  |  |  |  |  |  | 4.00% | 4.00%
Notional amount |  |  |  |  |  |  |  |  |  |  | $ 101,918,000 | 3,000,000
Bonds issued [Member] | Series M bonds [Member] |  |  |  |  |  |  |  |  |  |  |  |
Financial instruments [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Maturity date |  | 5 |  |  |  |  |  |  |  |  |  |
Effective rate |  | 3.30% |  |  |  |  |  |  | 3.30% |  |  |
Notional amount |  | $ 46,601 |  |  |  |  |  |  | 1,000,000 |  |  |

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