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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, 2019
Disclosure Of Revenue From Products and Services [Abstract] |
Disclosure of disaggregation of revenue from contracts with customers [text block] | The Group generates 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 year ended 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 |
Europe |  |  | 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 year ended 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 |
For the year ended December 31, 2017 |
Geographic areas |  | Specialty plant ‎ nutrition |  |  | Iodine and ‎ derivatives |  |  | Lithium and ‎ derivatives |  |  | Potassium |  |  | Industrial ‎ chemicals |  |  | Other |  |  | Total ThUS$ |
Chile |  |  | 91,243 |  |  |  | 1,054 |  |  |  | 802 |  |  |  | 20,001 |  |  |  | 2,522 |  |  |  | 45,942 |  |  |  | 161,564 |
Latin America and the Caribbean |  |  | 71,335 |  |  |  | 5,756 |  |  |  | 3,109 |  |  |  | 142,610 |  |  |  | 9,180 |  |  |  | 155 |  |  |  | 232,145 |
Europe |  |  | 177,997 |  |  |  | 81,557 |  |  |  | 88,443 |  |  |  | 72,405 |  |  |  | 28,346 |  |  |  | 305 |  |  |  | 449,053 |
North America |  |  | 235,963 |  |  |  | 67,491 |  |  |  | 42,918 |  |  |  | 69,105 |  |  |  | 25,824 |  |  |  | 553 |  |  |  | 441,854 |
Asia and others |  |  | 120,713 |  |  |  | 96,265 |  |  |  | 509,301 |  |  |  | 75,205 |  |  |  | 69,706 |  |  |  | 1,517 |  |  |  | 872,707 |
Total |  |  | 697,251 |  |  |  | 252,123 |  |  |  | 644,573 |  |  |  | 379,326 |  |  |  | 135,578 |  |  |  | 48,472 |  |  |  | 2,157,323 |
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 |  | 2019 |  |  | 2018 |  |  | 2017 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Specialty plant nutrition |  |  | 723,920 |  |  |  | 781,751 |  |  |  | 697,251 |
- Sodium Nitrates |  |  | 20,679 |  |  |  | 17,688 |  |  |  | 18,555 |
- Potassium nitrate and sodium potassium nitrate |  |  | 457,477 |  |  |  | 527,945 |  |  |  | 474,451 |
- Specialty Blends |  |  | 153,739 |  |  |  | 145,511 |  |  |  | 121,263 |
- Other specialty fertilizers |  |  | 92,025 |  |  |  | 90,607 |  |  |  | 82,982 |
Iodine and derivatives |  |  | 371,020 |  |  |  | 324,972 |  |  |  | 252,123 |
Lithium and derivatives |  |  | 505,714 |  |  |  | 734,801 |  |  |  | 644,573 |
Potassium |  |  | 212,151 |  |  |  | 267,474 |  |  |  | 379,326 |
Industrial chemicals |  |  | 94,875 |  |  |  | 108,267 |  |  |  | 135,578 |
Other |  |  | 35,975 |  |  |  | 48,538 |  |  |  | 48,472 |
- Services |  |  | 3,410 |  |  |  | 4,017 |  |  |  | 3,795 |
- Income from leasing properties |  |  | 1,438 |  |  |  | 1,474 |  |  |  | 71 |
- Income from subleases on right-of-use assets |  |  | 261 |  |  |  | - |  |  |  | - |
- Commodities |  |  | 16,176 |  |  |  | 18,581 |  |  |  | 11,822 |
- Other ordinary income from Commercial Offices |  |  | 14,690 |  |  |  | 24,466 |  |  |  | 32,784 |
Total |  |  | 1,943,655 |  |  |  | 2,265,803 |  |  |  | 2,157,323 |
Disclosure of cost of sales [text block] | 24.2 Cost of sales Cost of sales broken down by nature of expense
|  | For the period from January to December of the year |
Cost of sales |  | 2019 |  |  | 2018 |  |  | 2017 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Raw materials and consumables used |  |  | (271,912 | ) |  |  | (260,869 | ) |  |  | (227,617 | )
Classes of employee benefit expenses |  |  | (178,493 | ) |  |  | (203,571 | ) |  |  | (172,158 | )
Depreciation expense |  |  | (188,157 | ) |  |  | (212,641 | ) |  |  | (232,365 | )
Depreciation of Right-of-use Assets (contracts under IFRS 16) |  |  | (5,450 | ) |  |  | - |  |  |  | - |
Amortization expense |  |  | (5,102 | ) |  |  | (6,376 | ) |  |  | (7,490 | )
Investment plan expenses |  |  | (18,367 | ) |  |  | (11,860 | ) |  |  | (14,796 | )
Provision for site closure |  |  | (911 | ) |  |  | (2,045 | ) |  |  | (2,960 | )
Provision for materials, spare parts and supplies |  |  | (7,500 | ) |  |  | 1,721 |  |  |  | 1,746 |
Contractors |  |  | (123,096 | ) |  |  | (120,923 | ) |  |  | (118,610 | )
Operating leases |  |  | (47,007 | ) |  |  | (37,245 | ) |  |  | (36,333 | )
Mining concessions |  |  | (7,856 | ) |  |  | (8,168 | ) |  |  | (7,802 | )
Operations transport |  |  | (56,376 | ) |  |  | (64,352 | ) |  |  | (69,051 | )
Freight and product transport costs |  |  | (46,264 | ) |  |  | (51,387 | ) |  |  | (55,383 | )
Purchase of products from third parties |  |  | (189,583 | ) |  |  | (182,695 | ) |  |  | (184,226 | )
Insurance |  |  | (16,968 | ) |  |  | (11,923 | ) |  |  | (10,255 | )
CORFO rights |  |  | (143,861 | ) |  |  | (182,954 | ) |  |  | (46,274 | )
Export costs |  |  | (97,103 | ) |  |  | (107,418 | ) |  |  | (86,831 | )
Expenses related to variable payment leases (contracts under IFRS 16) |  |  | (1,096 | ) |  |  | - |  |  |  | - |
Variation in inventory |  |  | 52,557 |  |  |  | 20,597 |  |  |  | (76,009 | )
Variation in inventory provision |  |  | 17,107 |  |  |  | (8,997 | ) |  |  | (14,989 | )
Other expenses, by nature |  |  | (48,165 | ) |  |  | (34,525 | ) |  |  | (33,419 | )
Total |  |  | (1,383,603 | ) |  |  | (1,485,631 | ) |  |  | (1,394,822 | )
Disclosure of detailed information about other income [Text Block] | 24.3 Other income
Other income |  | As of December ‎ 31, 2019 |  |  | As of December ‎ 31, 2018 |  |  | As of December ‎ 31, 2017 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Discounts obtained from suppliers |  |  | 676 |  |  |  | 705 |  |  |  | 345 |
Fines charged to suppliers |  |  | 483 |  |  |  | 698 |  |  |  | 199 |
Taxes recovered |  |  | 457 |  |  |  | 996 |  |  |  | 1,278 |
Amounts recovered from insurance |  |  | 492 |  |  |  | 443 |  |  |  | 154 |
Overestimate of provisions for third-party obligations |  |  | 983 |  |  |  | 375 |  |  |  | 586 |
Other operating income |  |  | 2,422 |  |  |  | 1,536 |  |  |  | 4,543 |
Options on mining claims |  |  | 5,298 |  |  |  | 16,095 |  |  |  | 2,607 |
Easements, pipelines and roads |  |  | 7,204 |  |  |  | 10,806 |  |  |  | 4,656 |
Reimbursement mining licenses and notary expenses |  |  | 203 |  |  |  | 394 |  |  |  | 1,196 |
Shares obtained in junior mining companies through options |  |  | - |  |  |  | - |  |  |  | 2,263 |
Total |  |  | 18,218 |  |  |  | 32,048 |  |  |  | 17,827 |
Description of detailed information about employee benefits by nature of expenses [Text Block] | 24.4 Administrative expenses
Administrative expenses |  | As of December ‎ 31, 2019 |  |  | As of December ‎ 31, 2018 |  |  | As of December ‎ 31, 2017 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Remuneration and benefits to employees |  |  | (60,255 | ) |  |  | (63,880 | ) |  |  | (51,761 | )
Marketing costs |  |  | (3,911 | ) |  |  | (3,078 | ) |  |  | (2,539 | )
Amortization expenses |  |  | (5 | ) |  |  | (15 | ) |  |  | (8 | )
Entertainment expenses |  |  | (5,783 | ) |  |  | (4,805 | ) |  |  | (4,781 | )
Advisory services |  |  | (13,862 | ) |  |  | (12,848 | ) |  |  | (14,348 | )
Leases |  |  | (3,653 | ) |  |  | (4,556 | ) |  |  | (4,097 | )
Insurance |  |  | (2,553 | ) |  |  | (1,758 | ) |  |  | (1,767 | )
Office expenses |  |  | (7,327 | ) |  |  | (8,165 | ) |  |  | (5,357 | )
Contractors |  |  | (4,874 | ) |  |  | (5,730 | ) |  |  | (4,805 | )
Depreciation of Right-of-use Assets (contracts under IFRS 16) |  |  | (2,501 | ) |  |  | - |  |  |  | - |
Other expenses, by nature |  |  | (12,456 | ) |  |  | (13,291 | ) |  |  | (11,708 | )
Total |  |  | (117,180 | ) |  |  | (118,126 | ) |  |  | (101,171 | )
Disclosure of detailed information about expenses by function [Text Block] | 24.5 Other expenses by function
|  | For the period from January to December of the year |
Other expenses by function |  | 2019 |  |  | 2018 |  |  | 2017 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Depreciation and amortization expense |  |  |  |  |  |  |  |  |  |  |  |
Depreciation of assets not in use |  |  | (136 | ) |  |  | (59 | ) |  |  | (90 | )
Subtotal |  |  | (136 | ) |  |  | (59 | ) |  |  | (90 | )
Impairment losses (reversals of impairment losses) recognized in profit (loss) for the year |  |  |  |  |  |  |  |  |  |  |  |
Property, plant and equipment |  |  | (49 | ) |  |  | (1,390 | ) |  |  | - |
Intangible assets other than goodwill |  |  | (913 | ) |  |  | (1,736 | ) |  |  | - |
Goodwill |  |  | (140 | ) |  |  | (3,254 | ) |  |  | - |
Non-current assets and disowned groups held for sale |  |  | (607 | ) |  |  | - |  |  |  | - |
Subtotal |  |  | (1,709 | ) |  |  | (6,380 | ) |  |  | - |
Other expenses, by nature |  |  |  |  |  |  |  |  |  |  |  |
Legal expenses |  |  | (9,277 | ) |  |  | (15,139 | ) |  |  | (25,176 | )
VAT and other unrecoverable taxes |  |  | (613 | ) |  |  | (1,187 | ) |  |  | (1,295 | )
Fines paid |  |  | (145 | ) |  |  | (965 | ) |  |  | (1,112 | )
Investment plan expenses |  |  | (1,694 | ) |  |  | (7,555 | ) |  |  | (10,006 | )
Non-metallic exploration expenses |  |  | (5,537 | ) |  |  | (5,864 | ) |  |  | - |
Donations |  |  | (5,026 | ) |  |  | (4,502 | ) |  |  | (5,527 | )
Reorganization of related businesses |  |  | - |  |  |  | 6,000 |  |  |  | (6,000 | )
Other operating expenses |  |  | (1,858 | ) |  |  | (1,256 | ) |  |  | (4,394 | )
Subtotal |  |  | (24,150 | ) |  |  | (30,468 | ) |  |  | (53,510 | )
Total |  |  | (25,995 | ) |  |  | (36,907 | ) |  |  | (53,600 | )
Disclosure of detailed information about other income expenses [Text Block] | 24.6 Other gains (losses)
|  | For the period from January to December of the year |
Other income (expenses) |  | 2019 |  |  | 2018 |  |  | 2017 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Adjustment relating to previous year application of equity method to investments |  |  | (984 | ) |  |  | (664 | ) |  |  | 500 |
Impairment of interests in joint ventures (1) |  |  | 631 |  |  |  | (8,802 | ) |  |  | - |
Sales of investments in associates |  |  | - |  |  |  | (759 | ) |  |  | - |
Sales of investments in joint ventures |  |  | - |  |  |  | 14,507 |  |  |  | - |
Others |  |  | (30 | ) |  |  | 2,122 |  |  |  | 43 |
Total |  |  | (383 | ) |  |  | 6,404 |  |  |  | 543 |
Disclosure Of Impairment Losses And Reversal Of Impairment Losses [Table Text Block] | 24.7 Net impairment (losses)gains on reversal of financial assets
Net impairment (losses)of gains and on reversal of impairment financial assets ‎ losses |  | As of December 31, ‎ 2019 |  |  | As of December 31, ‎ 2018 |  |  | As of December 31, ‎ 2017 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
(Impairment loss)/ gain on reversal of financial assets |  |  | (1,057 | ) |  |  | 2,967 |  |  |  | (8,038 | )
Totals |  |  | (1,057 | ) |  |  | 2,967 |  |  |  | (8,038 | )
Disclosure of detailed information about expenses by nature [Text Block] | 24.8 Summary of expenses by nature
|  | For the period from January to December of the year |
Expenses by nature |  | 2019 |  |  | 2018 |  |  | 2017 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Raw materials and consumables |  |  | (271,912 | ) |  |  | (260,869 | ) |  |  | (227,617 | )
Classes of Employee Benefit Expenses |  |  | (238,748 | ) |  |  | (267,451 | ) |  |  | (223,919 | )
Depreciation and amortization expense |  |  |  |  |  |  |  |  |  |  |  |
Depreciation expense |  |  | (188,293 | ) |  |  | (212,700 | ) |  |  | (232,455 | )
Depreciation of Right-of-use Assets (IFRS 16) |  |  | (7,951 | ) |  |  | - |  |  |  | - |
Property, plant and equipment |  |  | (49 | ) |  |  | (1,390 | ) |  |  | - |
Goodwill |  |  | (140 | ) |  |  | (3,254 | ) |  |  | - |
Non-current assets and disowned groups held for sale |  |  | (607 | ) |  |  | - |  |  |  | - |
Amortization expense |  |  | (6,020 | ) |  |  | (8,127 | ) |  |  | (7,498 | )
Legal expenses |  |  | (9,277 | ) |  |  | (15,139 | ) |  |  | (25,176 | )
Investment plan expenses |  |  | (20,061 | ) |  |  | (19,415 | ) |  |  | (19,480 | )
Non-metallic exploration expenses |  |  | (5,537 | ) |  |  | (5,864 | ) |  |  | (5,322 | )
Provision for site closure |  |  | (911 | ) |  |  | (2,045 | ) |  |  | (2,960 | )
Provision for materials, spare parts and supplies |  |  | (7,500 | ) |  |  | 1,721 |  |  |  | 1,746 |
Contractors |  |  | (127,970 | ) |  |  | (126,653 | ) |  |  | (123,415 | )
Leases |  |  | (50,660 | ) |  |  | (41,801 | ) |  |  | (40,430 | )
Mining concessions |  |  | (7,856 | ) |  |  | (8,168 | ) |  |  | (7,802 | )
Operation transport |  |  | (56,376 | ) |  |  | (64,352 | ) |  |  | (69,051 | )
Freight and product transport costs |  |  | (46,264 | ) |  |  | (51,387 | ) |  |  | (55,383 | )
Purchase of products from third parties |  |  | (189,583 | ) |  |  | (182,695 | ) |  |  | (184,226 | )
CORFO rights |  |  | (143,861 | ) |  |  | (182,954 | ) |  |  | (46,274 | )
Export costs |  |  | (97,103 | ) |  |  | (107,418 | ) |  |  | (86,831 | )
Expenses related to Variable Parts Leases (IFRS 16) |  |  | (1,096 | ) |  |  | - |  |  |  | - |
Insurance |  |  | (19,521 | ) |  |  | (13,681 | ) |  |  | (12,022 | )
Restructuring of joint ventures. |  |  | - |  |  |  | 6,000 |  |  |  | (6,000 | )
Consultant and advisor services |  |  | (13,862 | ) |  |  | (12,848 | ) |  |  | (14,348 | )
Variation in inventory |  |  | 52,557 |  |  |  | 20,597 |  |  |  | (76,009 | )
Variation in provision on product inventory |  |  | 17,107 |  |  |  | (8,997 | ) |  |  | (14,989 | )
Other expenses, by nature |  |  | (85,284 | ) |  |  | (71,774 | ) |  |  | (70,133 | )
Total |  |  | (1,526,778 | ) |  |  | (1,640,664 | ) |  |  | (1,549,594 | )
Disclosure of interest expense [text block] | 24.9 Finance expenses
|  | For the period from January to December of the year |
Financial costs |  | 2019 |  |  | 2018 |  |  | 2017 |
|  | ThUS$ |  |  | ThUS$ |  |  | ThUS$ |
Interest expense from bank borrowings and overdrafts |  |  | (2,133 | ) |  |  | (1,707 | ) |  |  | (1,650 | )
Interest expense from bonds |  |  | (72,983 | ) |  |  | (55,887 | ) |  |  | (49,373 | )
Interest expense from loans |  |  | (2,682 | ) |  |  | (3,093 | ) |  |  | (2,002 | )
Capitalized interest expenses |  |  | 7,841 |  |  |  | 5,021 |  |  |  | 4,382 |
Financial expenses related to rehabilitation provisions |  |  | (4,417 | ) |  |  | (960 | ) |  |  | - |
Lease interest |  |  | (1,535 | ) |  |  | - |  |  |  | - |
Other finance costs |  |  | (1,030 | ) |  |  | (1,181 | ) |  |  | (1,481 | )
Total |  |  | (76,939 | ) |  |  | (57,807 | ) |  |  | (50,124 | )

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