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Inventories (Details 2) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Inventories [Abstract] |  |  |
Opening balance | $ 105,282 | $ 96,284 | $ 81,295
Increase in lower value | (6,987) | 7,845 | 19,515
Additional provisions | (123) | 3,176 | 573
Increase (decrease) in existing provisions | (6,262) | 2,436 | (178)
Provision used, other provisions | (3,736) | (139,506) | (4,921)
Total changes | (17,108) | 8,998 | 14,989
Final Balance | $ 88,174 | $ 105,282 | $ 96,284

X
- Definition The amount used (ie incurred and charged against the provision) for other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2019-01-01 -Paragraph 84 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2019-en-r&anchor=para_84_c&doctype=Standard -URIDate 2019-03-27 + Details
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Balance Type: | debit
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- Definition The amount of additional inventory provisions made. + References No definition available. + Details
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Balance Type: | credit
Period Type: | duration

X
- Definition The amount increase or decrease in existing provisions. + References No definition available. + Details
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X
- Definition The increase (decrease) in inventory reserves. + References No definition available. + Details
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X
- Definition It represents of increase in lower value. + References No definition available. + Details
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Namespace Prefix: | sqm_
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X
- References No definition available. + Details
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- Definition The amount of inventory reserves recognized. + References No definition available. + Details
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Balance Type: | credit
Period Type: | instant