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Gains (losses) from operating activities in the statement of income, included according to their nature (Tables) | 12 Months Ended
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Dec. 31, 2020
Disclosure Of Revenue From Products and Services [Abstract] |
Disclosure of disaggregation of revenue from contracts with customers [text block] | The Group derives revenues from the sale of goods (which are recognized at one point in time) and from the provision of services (which are recognized over time) and are distributed among the following geographical areas and main product and service lines.
| (a) | Geographic areas:
For the period ended December 31, 2020
Geographic areas |  | Specialty plant nutrition |  |  | Iodine and derivatives |  |  | Lithium and derivatives |  |  | Potassium |  |  | Industrial chemicals |  |  | Other |  |  | Total ThUS$ |
Chile |  |  | 100,353 |  |  |  | 1,234 |  |  |  | 399 |  |  |  | 23,963 |  |  |  | 4,059 |  |  |  | 23,737 |  |  |  | 153,745 |
Latin America and the Caribbean |  |  | 69,535 |  |  |  | 10,843 |  |  |  | 1,597 |  |  |  | 72,697 |  |  |  | 4,951 |  |  |  | 367 |  |  |  | 159,990 |
Europe |  |  | 145,896 |  |  |  | 142,161 |  |  |  | 49,719 |  |  |  | 30,029 |  |  |  | 11,585 |  |  |  | 735 |  |  |  | 380,125 |
North America |  |  | 246,737 |  |  |  | 90,292 |  |  |  | 25,558 |  |  |  | 39,432 |  |  |  | 23,963 |  |  |  | 1,588 |  |  |  | 427,570 |
Asia and Others |  |  | 139,167 |  |  |  | 90,127 |  |  |  | 306,100 |  |  |  | 43,173 |  |  |  | 116,050 |  |  |  | 1,144 |  |  |  | 695,761 |
Total |  |  | 701,688 |  |  |  | 334,657 |  |  |  | 383,373 |  |  |  | 209,294 |  |  |  | 160,608 |  |  |  | 27,571 |  |  |  | 1,817,191 |
For the period ended as of December 31, 2019
Geographic areas |  | Specialty plant nutrition |  |  | Iodine and derivatives |  |  | Lithium and derivatives |  |  | Potassium |  |  | Industrial chemicals |  |  | Other |  |  | Total ThUS$ |
Chile |  |  | 109,975 |  |  |  | 1,064 |  |  |  | 599 |  |  |  | 27,371 |  |  |  | 39,512 |  |  |  | 33,336 |  |  |  | 211,857 |
Latin America and the Caribbean |  |  | 78,872 |  |  |  | 7,972 |  |  |  | 3,593 |  |  |  | 64,868 |  |  |  | 6,354 |  |  |  | 269 |  |  |  | 161,928 |
Europa |  |  | 149,992 |  |  |  | 123,525 |  |  |  | 76,250 |  |  |  | 27,973 |  |  |  | 15,289 |  |  |  | 735 |  |  |  | 393,764 |
North America |  |  | 243,399 |  |  |  | 90,070 |  |  |  | 45,810 |  |  |  | 43,312 |  |  |  | 27,798 |  |  |  | 883 |  |  |  | 451,272 |
Asia and Others |  |  | 141,682 |  |  |  | 148,389 |  |  |  | 379,462 |  |  |  | 48,627 |  |  |  | 5,922 |  |  |  | 752 |  |  |  | 724,834 |
Total |  |  | 723,920 |  |  |  | 371,020 |  |  |  | 505,714 |  |  |  | 212,151 |  |  |  | 94,875 |  |  |  | 35,975 |  |  |  | 1,943,655 |
For the period ended as of December 31, 2018
Geographic areas |  | Specialty plant nutrition |  |  | Iodine and derivatives |  |  | Lithium and derivatives |  |  | Potassium |  |  | Industrial chemicals |  |  | Other |  |  | Total ThUS$ |
Chile |  |  | 111,595 |  |  |  | 1,052 |  |  |  | 700 |  |  |  | 25,593 |  |  |  | 4,575 |  |  |  | 45,834 |  |  |  | 189,349 |
Latin America and the Caribbean |  |  | 77,737 |  |  |  | 6,389 |  |  |  | 3,598 |  |  |  | 80,192 |  |  |  | 12,098 |  |  |  | 177 |  |  |  | 180,191 |
Europe |  |  | 200,229 |  |  |  | 112,080 |  |  |  | 103,430 |  |  |  | 46,068 |  |  |  | 17,384 |  |  |  | 473 |  |  |  | 479,664 |
North America |  |  | 240,995 |  |  |  | 83,587 |  |  |  | 68,254 |  |  |  | 50,685 |  |  |  | 27,347 |  |  |  | 647 |  |  |  | 471,515 |
Asia and Others |  |  | 151,195 |  |  |  | 121,864 |  |  |  | 558,819 |  |  |  | 64,936 |  |  |  | 46,863 |  |  |  | 1,407 |  |  |  | 945,084 |
Total |  |  | 781,751 |  |  |  | 324,972 |  |  |  | 734,801 |  |  |  | 267,474 |  |  |  | 108,267 |  |  |  | 48,538 |  |  |  | 2,265,803 |
Disclosure Of Revenue By Products Text Block [Text Block] |
| (b) | Main product and service lines:
|  | For the period from January to December of the year |
Products and Services |  | 2020 |  |  | 2019 |  |  | 2018 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Specialty plant nutrition |  |  | 701,688 |  |  |  | 723,920 |  |  |  | 781,751 |
- Sodium Nitrates |  |  | 18,291 |  |  |  | 20,679 |  |  |  | 17,688 |
-Potassium nitrate and sodium potassium nitrate |  |  | 424,041 |  |  |  | 457,477 |  |  |  | 527,945 |
- Specialty Blends |  |  | 163,033 |  |  |  | 153,739 |  |  |  | 145,511 |
- Other specialty fertilizers |  |  | 96,323 |  |  |  | 92,025 |  |  |  | 90,607 |
Iodine and derivatives |  |  | 334,657 |  |  |  | 371,020 |  |  |  | 324,972 |
Lithium and derivatives |  |  | 383,373 |  |  |  | 505,714 |  |  |  | 734,801 |
Potassium |  |  | 209,294 |  |  |  | 212,151 |  |  |  | 267,474 |
Industrial chemicals |  |  | 160,608 |  |  |  | 94,875 |  |  |  | 108,267 |
Other |  |  | 27,571 |  |  |  | 35,975 |  |  |  | 48,538 |
- Services |  |  | 3,241 |  |  |  | 3,410 |  |  |  | 4,017 |
- Income from property leases |  |  | 1,457 |  |  |  | 1,438 |  |  |  | 1,474 |
- Income from subleases on right-of-use assets |  |  | 176 |  |  |  | 261 |  |  |  | - |
- Commodities |  |  | 11,938 |  |  |  | 16,176 |  |  |  | 18,581 |
-Other ordinary income of Commercial Offices |  |  | 10,759 |  |  |  | 14,690 |  |  |  | 24,466 |
Total |  |  | 1,817,191 |  |  |  | 1,943,655 |  |  |  | 2,265,803 |
Disclosure of cost of sales [text block] |
| 23.2 | Cost of sales
Cost of sales broken down by nature of expense
|  | For the period from January to December of the year |
Nature of expense |  | 2020 |  |  | 2019 |  |  | 2018 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Raw materials and consumables used |  |  | (287,877 | ) |  |  | (271,912 | ) |  |  | (260,869 | )
Classes of employee benefit expenses |  |  | (178,956 | ) |  |  | (178,493 | ) |  |  | (203,571 | )
Depreciation expense |  |  | (182,410 | ) |  |  | (188,157 | ) |  |  | (212,641 | )
Depreciation of Right-of-use Assets (contracts under IFRS 16) |  |  | (5,814 | ) |  |  | (5,450 | ) |  |  | - |
Amortization expense |  |  | (12,655 | ) |  |  | (5,102 | ) |  |  | (6,376 | )
Investment plan expenses |  |  | (14,286 | ) |  |  | (18,367 | ) |  |  | (11,860 | )
Provision for site closure |  |  | (911 | ) |  |  | (911 | ) |  |  | (2,045 | )
Provision for materials, spare parts and supplies |  |  | 640 |  |  |  | (7,500 | ) |  |  | 1,721 |
Contractors |  |  | (142,001 | ) |  |  | (120,793 | ) |  |  | (120,923 | )
Operating leases |  |  | (57,461 | ) |  |  | (47,708 | ) |  |  | (37,245 | )
Mining concessions |  |  | (6,645 | ) |  |  | (7,856 | ) |  |  | (8,168 | )
Operations transport |  |  | (68,730 | ) |  |  | (56,376 | ) |  |  | (64,352 | )
Freight / product transport costs |  |  | (52,156 | ) |  |  | (46,264 | ) |  |  | (51,387 | )
Purchase of products from third parties |  |  | (224,115 | ) |  |  | (210,583 | ) |  |  | (182,695 | )
Insurance |  |  | (17,657 | ) |  |  | (16,968 | ) |  |  | (11,923 | )
CORFO rights and other agreements |  |  | (74,418 | ) |  |  | (143,861 | ) |  |  | (182,954 | )
Export costs |  |  | (71,718 | ) |  |  | (75,908 | ) |  |  | (107,418 | )
Expenses related to Variable Parts Leases (contracts under IFRS 16) |  |  | (1,133 | ) |  |  | (1,037 | ) |  |  | - |
Variation in inventory |  |  | 97,467 |  |  |  | 52,557 |  |  |  | 20,597 |
Variation in inventory provision |  |  | 7,244 |  |  |  | 17,107 |  |  |  | (8,997 | )
Other |  |  | (40,729 | ) |  |  | (50,021 | ) |  |  | (34,525 | )
Total |  |  | (1,334,321 | ) |  |  | (1,383,603 | ) |  |  | (1,485,631 | )
Disclosure of detailed information about other income [Text Block] |
| 23.3 | Other income
Other income |  | For the period from January to December of the year |
|  | 2020 |  |  | 2019 |  |  | 2018 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Discounts obtained from suppliers |  |  | 665 |  |  |  | 676 |  |  |  | 705 |
Fines charged to suppliers |  |  | 267 |  |  |  | 483 |  |  |  | 698 |
Taxes recovered |  |  | 346 |  |  |  | 457 |  |  |  | 996 |
Amounts recovered from insurance |  |  | 14,719 |  |  |  | 492 |  |  |  | 443 |
Overestimate of provisions for third-party obligations |  |  | 118 |  |  |  | 983 |  |  |  | 375 |
Sale of assets classified as properties, plant and equipment |  |  | 3,222 |  |  |  | 2,422 |  |  |  | 1,536 |
Options on mining rights |  |  | 5,852 |  |  |  | 5,298 |  |  |  | 16,095 |
Easements, pipelines and roads |  |  | 1,619 |  |  |  | 7,204 |  |  |  | 10,806 |
Mining licenses and notary costs reimbursed |  |  | 85 |  |  |  | 203 |  |  |  | 394 |
Total |  |  | 26,893 |  |  |  | 18,218 |  |  |  | 32,048 |
Description of detailed information about employee benefits by nature of expenses [Text Block] |
23.4 | Administrative expenses
Administrative expenses |  | For the period from January to December of the year |
|  | 2020 |  |  | 2019 |  |  | 2018 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Employee benefit expenses |  |  | (55,152 | ) |  |  | (60,255 | ) |  |  | (63,880 | )
Marketing costs |  |  | (2,377 | ) |  |  | (3,911 | ) |  |  | (3,078 | )
Amortization expenses |  |  | (91 | ) |  |  | (5 | ) |  |  | (15 | )
Entertainment expenses |  |  | (4,858 | ) |  |  | (5,783 | ) |  |  | (4,805 | )
Advisory services |  |  | (13,880 | ) |  |  | (13,862 | ) |  |  | (12,848 | )
Lease of buildings and facilities |  |  | (3,111 | ) |  |  | (3,653 | ) |  |  | (4,556 | )
Insurance |  |  | (3,478 | ) |  |  | (2,553 | ) |  |  | (1,758 | )
Office expenses |  |  | (6,204 | ) |  |  | (7,327 | ) |  |  | (8,165 | )
Contractors |  |  | (5,079 | ) |  |  | (4,874 | ) |  |  | (5,730 | )
Depreciation of Right-of-use Assets (contracts under IFRS 16) |  |  | (2,617 | ) |  |  | (2,501 | ) |  |  | - |
Other expenses, by nature |  |  | (10,170 | ) |  |  | (12,456 | ) |  |  | (13,291 | )
Total |  |  | (107,017 | ) |  |  | (117,180 | ) |  |  | (118,126 | )
Disclosure of detailed information about other expenses [Text Block] |
| 23.5 | Other expenses
Other expenses |  | For the period from January to December of the year |
|  | 2020 |  |  | 2019 |  |  | 2018 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Depreciation and amortization expense |  |  |  |  |  |  |  |  |  |  |  |
Depreciation of assets not in use |  |  | (42 | ) |  |  | (136 | ) |  |  | (59 | )
Subtotal |  |  | (42 | ) |  |  | (136 | ) |  |  | (59 | )
Impairment losses (reversals of impairment losses) recognized in profit for the year |  |  |  |  |  |  |  |  |  |  |  |
Properties, plant and equipment |  |  | (9,563 | ) |  |  | (49 | ) |  |  | (1,390 | )
Intangible assets other than goodwill |  |  | (1,658 | ) |  |  | (913 | ) |  |  | (1,736 | )
Goodwill |  |  | (140 | ) |  |  | (140 | ) |  |  | (3,254 | )
Amortization of intangible assets |  |  | (283 | ) |  |  | - |  |  |  | - |
Subtotal |  |  | (11,644 | ) |  |  | (1,102 | ) |  |  | (6,380 | )
Other expenses, by nature |  |  |  |  |  |  |  |  |  |  |  |
Legal expenses |  |  | (69,965 | ) |  |  | (9,277 | ) |  |  | (15,139 | )
VAT and other unrecoverable taxes |  |  | (626 | ) |  |  | (613 | ) |  |  | (1,187 | )
Fines paid |  |  | (314 | ) |  |  | (145 | ) |  |  | (965 | )
Investment plan expenses |  |  | (864 | ) |  |  | (1,693 | ) |  |  | (7,555 | )
Exploration expenses |  |  | (5,262 | ) |  |  | (5,537 | ) |  |  | (5,864 | )
Donations |  |  | (8,793 | ) |  |  | (5,026 | ) |  |  | (4,502 | )
Reorganization of related businesses |  |  | - |  |  |  | - |  |  |  | 6,000 |
Other operating expenses |  |  | (2,102 | ) |  |  | (2,466 | ) |  |  | (1,256 | )
Subtotal |  |  | (87,926 | ) |  |  | (24,757 | ) |  |  | (30,468 | )
Total |  |  | (99,612 | ) |  |  | (25,995 | ) |  |  | (36,907 | )
Disclosure of detailed information about other income expenses [Text Block] |
| 23.6 | Other gains (losses)
|  | For the period from January to December of the year |
Other income (expenses) |  | 2020 |  |  | 2019 |  |  | 2018 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Adjust previous year application method of participation |  |  | (49 | ) |  |  | (985 | ) |  |  | (664 | )
Losses in the sale of investments in associates |  |  | (11,830 | ) |  |  | - |  |  |  | (759 | )
Impairment of interests in associates |  |  | 7,235 |  |  |  | 631 |  |  |  | (8,802 | )
Losses in the sale of investments in joint Ventures |  |  | (481 | ) |  |  | - |  |  |  | 14,507 |
Others |  |  | (188 | ) |  |  | (29 | ) |  |  | 2,122 |
Total |  |  | (5,313 | ) |  |  | (383 | ) |  |  | 6,404 |
Disclosure of detailed information about impairment reversion of value of financial assets impairment Losses [Text Block] |
23.7 | (Impairment) /reversion of value of financial assets impairment losses
|  | For the period from January to December of the year |
Description |  | 2020 |  |  | 2019 |  |  | 2018 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
(Impairment) /reversion of value of financial assets impairment losses (See Note 13.2) |  |  | 4,684 |  |  |  | (1,057 | ) |  |  | 2,967 |
Total |  |  | 4,684 |  |  |  | (1,057 | ) |  |  | 2,967 |
Disclosure of detailed information about expenses by nature [Text Block] |
| 23.8 | Summary of expenses by nature
The following summary considers notes 23.2, 23.4 and 23.5
Expenses by nature |  | For the period from January to December of the year |
|  | 2020 |  |  | 2019 |  |  | 2018 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Raw materials and consumables |  |  | (287,877 | ) |  |  | (271,912 | ) |  |  | (260,869 | )
Classes of Employee Benefit Expenses |  |  | (234,108 | ) |  |  | (238,748 | ) |  |  | (267,451 | )
Depreciation and amortization expense |  |  |  |  |  |  |  |  |  |  |  |
Depreciation expense |  |  | (182,452 | ) |  |  | (188,293 | ) |  |  | (212,700 | )
Depreciation of Right-of-use Assets |  |  | (8,431 | ) |  |  | (7,951 | ) |  |  | - |
Impairment of Value |  |  | (1,658 | ) |  |  | (913 | ) |  |  | (1,390 | )
Properties, plant and equipment |  |  | (9,563 | ) |  |  | (49 | ) |  |  | (3,254 | )
Goodwill |  |  | (140 | ) |  |  | (140 | ) |  |  | - |
Amortization expense |  |  | (13,029 | ) |  |  | (5,107 | ) |  |  | (8,127 | )
Legal expenses |  |  | (69,965 | ) |  |  | (9,277 | ) |  |  | (15,139 | )
Investment plan expenses |  |  | (15,150 | ) |  |  | (20,060 | ) |  |  | (19,415 | )
Exploration expenses |  |  | (5,262 | ) |  |  | (5,537 | ) |  |  | (5,864 | )
Provision for site closure |  |  | (911 | ) |  |  | (911 | ) |  |  | (2,045 | )
Provision for materials, spare parts and supplies |  |  | 640 |  |  |  | (7,500 | ) |  |  | 1,721 |
Contractors |  |  | (147,080 | ) |  |  | (125,667 | ) |  |  | (126,653 | )
Operation leases |  |  | (60,572 | ) |  |  | (51,361 | ) |  |  | (41,801 | )
Mining concessions |  |  | (6,645 | ) |  |  | (7,856 | ) |  |  | (8,168 | )
Operation transport |  |  | (68,730 | ) |  |  | (56,376 | ) |  |  | (64,352 | )
Freight and product transport costs |  |  | (52,156 | ) |  |  | (46,264 | ) |  |  | (51,387 | )
Purchase of products from third parties |  |  | (224,115 | ) |  |  | (210,583 | ) |  |  | (182,695 | )
CORFO rights y other agreements |  |  | (74,418 | ) |  |  | (143,861 | ) |  |  | (182,954 | )
Export costs |  |  | (71,718 | ) |  |  | (75,908 | ) |  |  | (107,418 | )
Expenses related to Variable Parts Leases (IFRS 16) |  |  | (1,133 | ) |  |  | (1,037 | ) |  |  | - |
Insurance |  |  | (21,135 | ) |  |  | (19,521 | ) |  |  | (13,681 | )
Restructuring of joint ventures |  |  |  |  |  |  |  |  |  |  | 6,000 |
Consultant and advisor services |  |  | (13,880 | ) |  |  | (13,862 | ) |  |  | (12,848 | )
Variation in gross inventory |  |  | 97,467 |  |  |  | 52,557 |  |  |  | 20,597 |
Variation in provision on product inventory |  |  | 7,244 |  |  |  | 17,107 |  |  |  | (8,997 | )
Other expenses |  |  | (76,173 | ) |  |  | (87,748 | ) |  |  | (71,774 | )
Total expenses by nature |  |  | (1,540,950 | ) |  |  | (1,526,778 | ) |  |  | (1,640,664 | )
Disclosure of interest expense [text block] |
| 23.9 | Finance expenses
|  | For the period from January to December of the year |
Finance expenses |  | 2020 |  |  | 2019 |  |  | 2018 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Interest expense from bank borrowings and overdrafts |  |  | (2,797 | ) |  |  | (2,133 | ) |  |  | (1,707 | )
Interest expense from bonds |  |  | (87,030 | ) |  |  | (72,984 | ) |  |  | (55,887 | )
Interest expense from loans |  |  | (1,598 | ) |  |  | (2,682 | ) |  |  | (3,093 | )
Capitalized interest expenses |  |  | 8,462 |  |  |  | 7,841 |  |  |  | 5,021 |
Financial expenses for restoration and rehabilitation provisions |  |  | 2,947 |  |  |  | (4,417 | ) |  |  | (960 | )
Interest on lease agreement |  |  | (1,133 | ) |  |  | (1,535 | ) |  |  | - |
Other finance costs |  |  | (1,050 | ) |  |  | (1,029 | ) |  |  | (1,181 | )
Total |  |  | (82,199 | ) |  |  | (76,939 | ) |  |  | (57,807 | )
Disclosure of finance income [text block] |
| 23.10 | Finance income
|  | For the period from January to December of the year |
Finance income |  | 2020 |  |  | 2019 |  |  | 2018 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Interest from term deposits |  |  | 10,260 |  |  |  | 15,345 |  |  |  | 13,758 |
Interest from marketable securities |  |  | 2,147 |  |  |  | 6,765 |  |  |  | 6,253 |
Interest from maintenance of minimum bank balance in current account |  |  | 18 |  |  |  | - |  |  |  | 262 |
Other finance income |  |  | 1,031 |  |  |  | 4,130 |  |  |  | 2,195 |
Other finance interest |  |  | 259 |  |  |  | 49 |  |  |  | 65 |
Total |  |  | 13,715 |  |  |  | 26,289 |  |  |  | 22,533 |

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