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Disclosures on reserves in Equity (Tables) | 12 Months Ended
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Dec. 31, 2019
Disclosure of detailed information about controls capital management [Abstract] |
Disclosure of detailed information about controls capital management [Text Block] | The Company’s management controls capital management based on the following ratios:
Capital Management |  | As of ‎ December 31, ‎ 2019 |  |  | As of ‎ December 31, ‎ 2018 |  |  | Description (1) |  | Calculation (1)
Net Financial Debt (ThUS$) |  |  | 719,809 |  |  |  | 471,755 |  |  | Financial Debt – Financial Resources |  | Other current Financial Liabilities + Other Non-Current Financial Liabilities – Cash and Cash Equivalents – Other Current Financial Assets – Hedging Assets, non-current
Liquidity |  |  | 3.45 |  |  |  | 4.32 |  |  | Current Assets divided by Current Liabilities |  | Total Current Assets / Total Current Liabilities
Net Debt / Capitalization |  |  | 0.25 |  |  |  | 0.18 |  |  | Net Financial Debt divided by Total Equity |  | Net financial debt / Total Equity
ROE |  |  | 13.154 | % |  |  | 20.7 | % |  | Profit for the year divided by Total Equity |  | LTM (2) Profit for the year / Equity
Adjusted EBITDA (ThUS$) |  |  | 645,142 |  |  |  | 855,652 |  |  | 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 (MUS$) |  |  | 669,831 |  |  |  | 902,450 |  |  | EBITDA |  | Profit for the year + Depreciation and Amortization Expenses + Finance Costs + Income Tax
ROA |  |  | 12.76 | % |  |  | 20.31 | % |  | Adjusted EBITDA – Depreciation divided by Total Assets net of financial resources less related parties’ investments |  | (LTM Gross Profit – Administrative Expenses)/ (Total Assets – Cash and Cash Equivalents – Other Current Financial Assets – Other Non-Current Financial Assets – Equity-accounted Investments)
Indebtedness |  |  | 1.19 |  |  |  | 1.00 |  |  | Total Liabilities on Equity |  | Total Liabilities / Total Equity
Disclosure of classes of share capital [text block] | Detail of capital classes in shares: As of December 31, 2019 and 2018, the Company has not placed any new shares issues on the market
|  | As of December 31, 2019 |  |  | As of December 31, 2018 |
Type of capital in preferred shares |  | Serie A |  |  | Serie B |  |  | Serie A |  |  | Serie B |
Description of type of capital in preferred shares |
Number of authorized shares |  |  | 142,819,552 |  |  |  | 120,376,972 |  |  |  | 142,819,552 |  |  |  | 120,376,972 |
Number of fully subscribed and paid shares |  |  | 142,819,552 |  |  |  | 120,376,972 |  |  |  | 142,819,552 |  |  |  | 120,376,972 |
Number of subscribed, partially paid shares |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Par value of shares in US$ |  |  | 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 |
19.3 Disclosures on reserves in Equity As of December 31, 2019, 2018 and 2017, this caption comprises the following:
Disclosures on reserves un Equity |  | As of December ‎ 31, 2019 |  |  | As of December ‎ 31, 2018 |  |  | As of December ‎ 31, 2017 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Reserve for currency exchange conversion |  |  | (25,745 | ) |  |  | (26,307 | ) |  |  | (24,913 | )
Reserve for cash flow hedges |  |  | 7,196 |  |  |  | 7,971 |  |  |  | 2,248 |
Reserve for gains and losses from financial assets measured at fair value through other comprehensive income |  |  | (270 | ) |  |  | (1,111 | ) |  |  | 2,937 |
Reserve for actuarial gains or losses in defined benefit plans |  |  | (9,490 | ) |  |  | (6,884 | ) |  |  | (5,953 | )
Other reserves |  |  | 14,086 |  |  |  | 11,332 |  |  |  | 11,332 |
Total |  |  | (14,223 | ) |  |  | (14,999 | ) |  |  | (14,349 | )
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 |
Movements |  | Before taxes |  |  | Before taxes |  |  | Tax |  |  | Before taxes |  |  | Deferred taxes |  |  | Before taxes |  |  | Deferred taxes |  |  | Before taxes |  |  | Reserves |  |  | Deferred taxes |  |  | Total reserves |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Opening balance as of January 1, 2017 |  |  | (19,463 | ) |  |  | 64 |  |  |  | - |  |  |  | (5,446 | ) |  |  | 612 |  |  |  | 4,813 |  |  |  | (1,300 | ) |  |  | 7,832 |  |  |  | (12,200 | ) |  |  | (688 | ) |  |  | (12,888 | )
Increase |  |  | 1,992 |  |  |  | 4,068 |  |  |  | - |  |  |  | 1,092 |  |  |  | (308 | ) |  |  | 6,090 |  |  |  | - |  |  |  | 3,500 |  |  |  | 16,742 |  |  |  | (308 | ) |  |  | 16,434 |
Decrease |  |  | (7,442 | ) |  |  | (1,884 | ) |  |  | - |  |  |  | (2,493 | ) |  |  | 590 |  |  |  | (6,116 | ) |  |  | (550 | ) |  |  | - |  |  |  | (17,935 | ) |  |  | 40 |  |  |  | (17,895 | )
Closing balance as of December 31, 2017 |  |  | (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 | )
Disclosure of detailed information about legal reserves reported in the individual financial statements of the subsidiaries [Text Block] |
Subsidiary - Associate |  | As of December ‎ 31, 2019 |  |  | As of December ‎ 31, 2018 |  |  | As of December ‎ 31, 2017 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
SQM Iberian S.A. (1) |  |  | 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 |  |  |  | 305 |
Kore Potash PLC |  |  | 2,754 |  |  |  | - |  |  |  | - |
Total |  |  | 15,763 |  |  |  | 13,009 |  |  |  | 13,009 |
Corresponds to the acquisition of the subsidiary SQM Iberian S.A., which was already under Company ownership at the acquisition date (IAS 27 R). |  |  | (1,677 | ) |  |  | (1,677 | ) |  |  | (1,677 | )
Total Other reserves |  |  | 14,086 |  |  |  | 11,332 |  |  |  | 11,332 |
| (1) | In the case of SQM Iberian S.A., the balance corresponds to the results obtained in the previous financial year which are presented as forming part of other reserves because of local regulations
Disclosure of dividends [text block] | Dividends were the following:
Dividends |  | For the year ended ‎ December 31, 2019 |  |  | For the year ended ‎ December 31, 2018 |  |  | For the year ended ‎ December 31, 2017 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Ajay SQM Chile S.A. Dividends |  |  | 882 |  |  |  | 823 |  |  |  | 55,501 |
Soquimich Comercial S.A. Interim Dividend |  |  | 3,936 |  |  |  | 7,872 |  |  |  | - |
Soquimich Comercial S.A. Payable Dividend |  |  | 1,999 |  |  |  | 1,038 |  |  |  | 3,171 |
Non-controlling interests |  |  | 6,817 |  |  |  | 9,733 |  |  |  | 58,672 |
Interim dividend |  |  | 211,224 |  |  |  | 331,199 |  |  |  | 317,243 |
Additional dividend |  |  | - |  |  |  | 100,000 |  |  |  | - |
Dividends payable |  |  | 66,891 |  |  |  | 108,631 |  |  |  | 107,358 |
Owners of the Parent |  |  | 278,115 |  |  |  | 539,8300 |  |  |  | 424,601 |
Dividends discounted from equity for the period |  |  | 284,932 |  |  |  | 549,563 |  |  |  | 483,273 |
Disclosure of Information attributable to non-controlling interests [Text Block] | Detail of non-controlling interests
|  |  |  |  |  |  |  | Profit (loss) attributable to non-controlling interest |  |  | Equity, non-controlling interests |  |  | Dividends paid to noncontrolling interests |
Subsidiaries |  |  |  |  | % of interests in ‎ the ownership ‎ held ‎ by non-controlling ‎ interest |  |  | For the year ‎ ended ‎ December 31, ‎ 2019 |  |  | For the year ‎ ended ‎ December 31, ‎ 2018 |  |  | For the year ‎ ended ‎ December ‎ 31, 2017 |  |  | For the year ‎ ended ‎ December ‎ 31, 2019 |  |  | For the year ‎ ended ‎ December 31, ‎ 2018 |  |  | For the ‎ year ‎ ended ‎ December ‎ 31, 2017 |  |  | For the year ‎ ended ‎ December ‎ 31, 2019 |  |  | For the year ‎ ended ‎ December ‎ 31, 201 8 |  |  | For the year ‎ ended ‎ December ‎ 31, 2017 |
|  |  |  |  |  |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Proinsa Ltda. |  |  |  |  |  |  |  |  |  |  | 0.1 | % |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
SQM Potasio S.A. |  |  |  |  |  |  |  |  |  |  | 0.00001 | % |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Ajay SQM Chile S.A. |  |  |  |  |  |  |  |  |  |  | 49 | % |  |  | 740 |  |  |  | 1,176 |  |  |  | 1,023 |  |  |  | 8,517 |  |  |  | 8,659 |  |  |  | 8,306 |  |  |  | 882 |  |  |  | 823 |  |  |  | 989 |
Soquimich Comercial S.A. |  |  |  |  |  |  |  |  |  |  | 39.3616784 | % |  |  | 1,999 |  |  |  | 1,375 |  |  |  | 100 |  |  |  | 38,103 |  |  |  | 41,855 |  |  |  | 49,247 |  |  |  | 5,935 |  |  |  | 8,910 |  |  |  | 1,264 |
Comercial Agrorama Ltda. |  |  |  |  |  |  |  |  |  |  | 30 | % |  |  | (251 | ) |  |  | (318 | ) |  |  | (403 | ) |  |  | (693 | ) |  |  | (481 | ) |  |  | (184 | ) |  |  | - |  |  |  | - |  |  |  | - |
Agrorama S.A. |  |  |  |  |  |  |  |  |  |  | 0.001 | % |  |  | - |  |  |  | - |  |  |  |  |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Orcoma Estudios SPA |  |  |  |  |  |  |  |  |  |  | 49 | % |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 2,277 |  |  |  | 2,277 |  |  |  | 2,277 |  |  |  | - |  |  |  | - |  |  |  | - |
SQM Indonesia S.A. |  |  |  |  |  |  |  |  |  |  | 20 | % |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 1 |  |  |  | 1 |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Total |  |  |  | 2,488 |  |  |  | 2,233 |  |  |  | 720 |  |  |  | 48,205 |  |  |  | 52,311 |  |  |  | 59,646 |  |  |  | 6,817 |  |  |  | 9,733 |  |  |  | 2,253 |

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