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Effect of fluctuations in foreign currency exchange rates (Tables)
 12 Months Ended
Dec. 31, 2021
Disclosure of effect of changes in foreign exchange rates [Abstract]  
Disclosure of foreign currency exchange differences recognized in profit or loss except for financial instruments measured at fair value through profit or loss [Text Block]
(a)
Foreign currency exchange differences recognized in profit or loss and other comprehensive income:
 
Foreign currency exchange differences recognized in profit or loss and other
comprehensive income
 
As of
December 31,
2021
 
 
As of
December 31,
2020
 
 
As of
December 31,
2019
 
 
 
ThUS$
 
 
ThUS$
 
 
ThUS$
 
Conversion foreign exchange gains (losses) recognized in the result of the year
 
 
(17,241
)
 
 
(4,423
)
 
 
(2,169
)
Conversion foreign exchange reserves
                        
Conversion foreign exchange reserves attributable to the owners of the controlling entity     3,656       14,176       562  
Conversion foreign exchange reserves attributable to the non-controlling entity     584       (176 )     225  
Total
 
 
4,240
 
 
 
14,000
 
 
 
787
 
Disclosure of reserve of exchange differences on translation [Text Block]
(b)
Reserves for foreign currency exchange differences:
 
As of December 31, 2021, and 2020, are detailed as follows:
 
Details
 
As of
December 31,
2021
 
 
As of
December 31,
2020
 
 
As of
December 31,
2019
 
 
 
ThUS$
 
 
ThUS$
 
 
ThUS$
 
Changes in equity generated by the equity method value through conversion:
                        
Comercial Hydro S.A.     1,004       1,004       1,004  
SQMC Internacional Ltda.     (9 )     (9 )     (9 )
Proinsa Ltda.     (10 )     (10 )     (10 )
Comercial Agrorama Ltda.     155       (19 )     33  
Isapre Norte Grande Ltda.     (121 )     (14 )     (44 )
Almacenes y Depósitos Ltda.     305       211       142  
Sacal S.A.     (3 )     (3 )     (3 )
Sociedad Prestadora de Servicios de Salud Cruz del Norte S.A.     (36 )     (13 )     (19 )
Agrorama S.A.     628       92       231  
Doktor Tarsa     -       -       (13,811 )
SQM Vitas Fzco     (4,165 )     (3,736 )     (2,267 )
Doctochem     -       -       7  
SQM Eastmed Turkey     -       -       (155 )
Ajay Europe     (1,413 )     (693 )     (1,449 )
Coromandel SQM India     -       -       (431 )
SQM Italia SRL     -       -       (236 )
SQM Oceanía Pty Ltd.     (579 )     (579 )     (634 )
SQM Indonesia S.A.     (124 )     (124 )     (124 )
Abu Dhabi Fertillizers Industries WWL.     372       372       372  
SQM Holland B.V.     99       99       (197 )
SQM Thailand Limited     (68 )     (68 )     (68 )
SQM Europe     (1,983 )     (1,983 )     (1,983 )
SQM Australia Pty Ltd.     (1,732 )     (4,052 )     (4,035 )
Pavoni & C. Spa     (153 )     164       (185 )
Terra Tarsa BV     -       -       116  
Plantacote NV     -       -       (16 )
Doktolab Tarim Arastirma San.     -       -       (54 )
Kore Potash PLC (a)     -       (2,128 )     (1,754 )
SQM Colombia S.A.S.     (80 )     (80 )     (166 )
Total
 
 
(7,913
)
 
 
(11,569
)
 
 
(25,745
)