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Disclosures on reserves in Equity (Tables) | 12 Months Ended
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Dec. 31, 2020
Disclosure of detailed information about controls capital management [Abstract] |
Disclosure of detailed information about controls capital management [Text Block] |
Capital Management |  | As of December 31, 2020 |  |  | As of December 31, 2019 |  |  | Description (1) |  | Calculation (1)
Net Financial Debt (ThUS$) |  |  | 1,074,020 |  |  |  | 681,912 |  |  | Financial Debt – Financial Resources |  | Other current Financial Liabilities + Other Non-Current Financial Liabilities– Cash and Cash Equivalents – Other Current Financial Assets – Hedging Assets, non-current
Liquidity |  |  | 5.40 |  |  |  | 3.45 |  |  | Current Assets divided by Current Liabilities |  | Total Current Assets / Total Current Liabilities
ROE |  |  | 7.79 | % |  |  | 13.15 | % |  | Profit for the year divided by Total Equity |  | LTM (2) Profit for the year / Equity
Adjusted EBITDA (ThUS$) |  |  | 579,765 |  |  |  | 644,223 |  |  | Adjusted EBITDA |  | Profit for the year + Depreciation and Amortization Expenses + Finance Costs + Income Tax – Other income and Share of profit of associates and joint ventures + Other expenses – Finance income – Currency differences
EBITDA (ThUS$) |  |  | 524,650 |  |  |  | 668,912 |  |  | EBITDA |  | Profit for the year + Depreciation and Amortization Expenses + Finance Costs + Income Tax
ROA |  |  | 9.83 | % |  |  | 12.76 | % |  | Adjusted EBITDA – Depreciation divided by Total Assets net of financial resources less related parties’ investments |  | (LTM Gross Profit – Administrative Expenses)/ (Total Assets – Cash and Cash Equivalents – Other Current Financial Assets – Other Non-Current Financial Assets – Equity-accounted Investments)
Indebtedness |  |  | 0.50 |  |  |  | 0.32 |  |  | Total Liabilities on Equity |  | Total Liabilities / Total Equity
Disclosure of classes of share capital [text block] | Detail of capital classes in shares: As of December 31, 2020, and December 31, 2019, the Company has not placed any new shares issues on the market
Type of capital in preferred shares |  | As of December 31, 2020 |  |  | As of December 31, 2019 |
|  | Series A |  |  | Series B |  |  | Series A |  |  | Series B |
Description of type of capital in shares
Number of authorized shares |  |  | 142,819,552 |  |  |  | 120,376,972 |  |  |  | 142,819,552 |  |  |  | 120,376,972 |
Number of fully subscribed and paid shares |  |  | 142,819,552 |  |  |  | 120,376,972 |  |  |  | 142,819,552 |  |  |  | 120,376,972 |
Number of subscribed, partially paid shares |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Par value of shares in US$ |  |  | 0.9435 |  |  |  | 2.8464 |  |  |  | 0.9435 |  |  |  | 2.8464 |
Increase (decrease) in the number of current shares |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Number of current shares |  |  | 142,819,552 |  |  |  | 120,376,972 |  |  |  | 142,819,552 |  |  |  | 120,376,972 |
Number of shares owned by the entity or its subsidiaries or associates |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Number of shares whose issuance is reserved due to the existence of options or agreements to dispose shares |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Capital amount in shares ThUS$ |  |  | 134,750 |  |  |  | 342,636 |  |  |  | 134,750 |  |  |  | 342,636 |
Amount of premium issuance ThUS$ |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Amount of reserves ThUS$ |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Total number of subscribed shares |  |  | 142,819,552 |  |  |  | 120,376,972 |  |  |  | 142,819,552 |  |  |  | 120,376,972 |
| 20.3 | Disclosures on reserves in Equity
As of December 31, 2020, and December 31, 2019, this caption comprises the following:
Disclosures on reserves in equity |  | As of December 31, 2020 |  |  | As of December 31, 2019 |  |  | As of December 31, 2018 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Reserve for currency exchange conversion (1) |  |  | (11,569 | ) |  |  | (25,745 | ) |  |  | (26,307 | )
Reserve for cash flow hedges (2) |  |  | 4,491 |  |  |  | 7,196 |  |  |  | 7,971 |
Reserve for gains and losses from financial assets measured at fair value through other comprehensive income (3) |  |  | 6,872 |  |  |  | (270 | ) |  |  | (1,111 | )
Reserve for actuarial gains or losses in defined benefit plans (4) |  |  | (8,680 | ) |  |  | (9,490 | ) |  |  | (6,884 | )
Other reserves |  |  | 16,318 |  |  |  | 14,086 |  |  |  | 11,332 |
Total |  |  | 7,432 |  |  |  | (14,223 | ) |  |  | (14,999 | )
Disclosure of detailed information about movement in other reserves [Text Block] | Movements in other reserves and changes in interest were as follows:
|  | Foreign currency translation difference |  |  | Reserve for cash flow hedges |  |  | Reserve for actuarial gains and losses from defined benefit plans |  |  | Reserve for gains (losses) from financial assets measured at fair value through other comprehensive income |  |  | Other reserves |  |  | Total reserves |
|  | Before |  |  | Before |  |  |  |  |  | Before |  |  | Deferred |  |  | Before |  |  | Deferred |  |  | Before |  |  |  |  |  | Deferred |  |  | Total |
Movements |  | taxes |  |  | taxes |  |  | Tax |  |  | taxes |  |  | taxes |  |  | taxes |  |  | taxes |  |  | taxes |  |  | Reserves |  |  | Taxes |  |  | reserves |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Opening balance as of January 1, 2018 |  |  | (24,913 | ) |  |  | 2,248 |  |  |  | - |  |  |  | (6,847 | ) |  |  | 894 |  |  |  | 4,787 |  |  |  | (1,850 | ) |  |  | 11,332 |  |  |  | (13,393 | ) |  |  | (956 | ) |  |  | (14,349 | )
Increase |  |  | 6,542 |  |  |  | 14,794 |  |  |  | - |  |  |  | 674 |  |  |  | (133 | ) |  |  | 294 |  |  |  | (79 | ) |  |  | - |  |  |  | 22,304 |  |  |  | (212 | ) |  |  | 22,092 |
Decrease |  |  | (7,936 | ) |  |  | (9,071 | ) |  |  | - |  |  |  | (2,003 | ) |  |  | 531 |  |  |  | (5,841 | ) |  |  | 1,578 |  |  |  | - |  |  |  | (24,851 | ) |  |  | 2,109 |  |  |  | (22,742 | )
Closing balance as of December 31, 2018 |  |  | (26,307 | ) |  |  | 7,971 |  |  |  | - |  |  |  | (8,176 | ) |  |  | 1,292 |  |  |  | (760 | ) |  |  | (351 | ) |  |  | 11,332 |  |  |  | (15,940 | ) |  |  | 941 |  |  |  | (14,999 | )
Increase |  |  | 1,824 |  |  |  | 8,628 |  |  |  | (2,683 | ) |  |  | - |  |  |  | - |  |  |  | 1,570 |  |  |  | (424 | ) |  |  | 3,093 |  |  |  | 15,115 |  |  |  | (3,107 | ) |  |  | 12,008 |
Decrease |  |  | (1,262 | ) |  |  | (6,720 | ) |  |  | - |  |  |  | (3,306 | ) |  |  | 700 |  |  |  | (418 | ) |  |  | 113 |  |  |  | (339 | ) |  |  | (12,045 | ) |  |  | 813 |  |  |  | (11,232 | )
Closing balance as of December 31, 2019 |  |  | (25,745 | ) |  |  | 9,879 |  |  |  | (2,683 | ) |  |  | (11,482 | ) |  |  | 1,992 |  |  |  | 392 |  |  |  | (662 | ) |  |  | 14,086 |  |  |  | (12,870 | ) |  |  | (1,353 | ) |  |  | (14,223 | )
Increase |  |  | 15,732 |  |  |  | - |  |  |  | - |  |  |  | 3,858 |  |  |  | 430 |  |  |  | 11,885 |  |  |  | (3,180 | ) |  |  | 2,121 |  |  |  | 33,596 |  |  |  | (2,750 | ) |  |  | 30,846 |
Decrease |  |  | (1,556 | ) |  |  | (3,706 | ) |  |  | 1,001 |  |  |  | (2,903 | ) |  |  | (575 | ) |  |  | (2,101 | ) |  |  | 538 |  |  |  | 111 |  |  |  | (10,155 | ) |  |  | 964 |  |  |  | (9,191 | )
Closing balance as of December 31, 2020 |  |  | (11,569 | ) |  |  | 6,173 |  |  |  | (1,682 | ) |  |  | (10,527 | ) |  |  | 1,847 |  |  |  | 10,176 |  |  |  | (3,304 | ) |  |  | 16,318 |  |  |  | 10,571 |  |  |  | (3,139 | ) |  |  | 7,432 |
Disclosure of detailed information about legal reserves reported in the individual financial statements of the subsidiaries [Text Block] |
Subsidiary – Associate |  | As of December 31, 2020 |  |  | As of December 31, 2019 |  |  | As of December 31, 2018 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
SQM Iberian S.A. |  |  | 9,464 |  |  |  | 9,464 |  |  |  | 9,464 |
SQM Europe NV |  |  | 1,957 |  |  |  | 1,957 |  |  |  | 1,957 |
Soquimich European holding B.V. |  |  | 828 |  |  |  | 828 |  |  |  | 828 |
Abu Dhabi Fertilizer Industries WWL |  |  | 455 |  |  |  | 455 |  |  |  | 455 |
Doktor Tarsa Tarim Sanayi AS |  |  | - |  |  |  | 305 |  |  |  | 305 |
Kore Potash PLC |  |  | 3,170 |  |  |  | 2,754 |  |  |  | - |
Total |  |  | 15,874 |  |  |  | 15,763 |  |  |  | 13,009 |
Other derivative reserves of the acquisition of subsidiaries, which was already under Company ownership at the acquisition date (IAS 27R) |  |  |  |  |  |  |  |  |  |  |  |
SQM Iberian S.A. |  |  | (1,677 | ) |  |  | (1,677 | ) |  |  | (1,677 | )
Orcoma Estudios SPA |  |  | 2,121 |  |  |  | - |  |  |  | - |
Total Other reserves |  |  | 16,318 |  |  |  | 14,086 |  |  |  | 11,332 |
Disclosure of dividends [text block] | Dividends discounted from equity from January to December 2020 and 2019 were the following:
Dividends |  | December 31, 2020 |  |  | December 31, 2019 |  |  | December 31, 2018 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Ajay SQM Chile S.A. Dividends |  |  | 556 |  |  |  | 882 |  |  |  | 823 |
Ajay SQM Chile S.A Payable Dividend |  |  | 682 |  |  |  | - |  |  |  | - |
Soquimich Comercial S.A. Potential Dividend |  |  | 5,904 |  |  |  | 3,936 |  |  |  | 7,872 |
Soquimich Comercial S.A. Payable Dividend |  |  | 2,976 |  |  |  | 1,999 |  |  |  | 1,038 |
Non-controlling interests |  |  | 10,118 |  |  |  | 6,817 |  |  |  | 9,733 |
Interim dividend |  |  | 44,986 |  |  |  | 211,224 |  |  |  | 331,199 |
Potential dividend |  |  | 100,000 |  |  |  | - |  |  |  | 100,000 |
Dividends payable |  |  | 4,369 |  |  |  | 66,891 |  |  |  | 108,631 |
Owners of the Parent |  |  | 149,355 |  |  |  | 278,115 |  |  |  | 539,830 |
Dividends discounted from equity for the period |  |  | 159,473 |  |  |  | 284,932 |  |  |  | 549,563 |

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