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Effect of fluctuations in foreign currency exchange rates (Tables)
 12 Months Ended
Dec. 31, 2018
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 except for financial instruments measured at fair value through profit or loss:
 
 
 
12/31/2018
ThUS$
 
 
12/31/2017
ThUS$
 
 
12/31/2016
ThUS$
 
 
 
 
 
 
 
 
 
 
 
Conversion foreign exchange gains (losses) recognized in the result of the year.
 
 
(16,597
)
 
 
(1,299
)
 
 
460
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Conversion foreign exchange reserves attributable to the owners of the controlling entity.
 
 
(1,394
)
 
 
(5,450
)
 
 
(5,428
)
 
 
 
 
 
 
 
 
 
 
 
 
 
Conversion foreign exchange reserves attributable to the non-controlling entity.
 
 
168
 
 
 
4
 
 
 
35
 
Disclosure of reserve of exchange differences on translation [Text Block]
As of December 31, 2018 and 2017, foreign currency exchange differences are detailed as follows:
 
Detail
 
 
12/31/2018
ThUS$
 
 
12/31/2017
ThUS$
 
 
12/31/2016
ThUS$
 
Changes in equity generated by conversion of equity value:
 
 
 
 
 
 
 
 
 
 
 
 
Comercial Hydro S.A.
 
 
1,004
 
 
 
1,004
 
 
 
1,004
 
SQMC Internacional Ltda.
 
 
(17
)
 
 
(2
)
 
 
(13
)
Proinsa Ltda.
 
 
(11
)
 
 
(7
)
 
 
(10
)
Comercial Agrorama Ltda.
 
 
(21
)
 
 
(44
)
 
 
(69
)
Isapre Norte Grande Ltda.
 
 
(1
)
 
 
(74
)
 
 
(124
)
Almacenes y Depósitos Ltda.
 
 
113
 
 
 
97
 
 
 
47
 
Sacal S.A.
 
 
(3
)
 
 
-
 
 
 
(29
)
Sociedad Prestadora de Servicios de Salud Cruz del Norte S.A.
 
 
(10
)
 
 
-
 
 
 
(6
)
Agrorama S.A.
 
 
132
 
 
 
(98
)
 
 
(49
)
Doktor Tarsa
 
 
(13,811
)
 
 
(14,447
)
 
 
(12,264
)
SQM Vitas Fzco
 
 
(2,682
)
 
 
(1,779
)
 
 
(1,801
)
Ajay Europe
 
 
(1,270
)
 
 
(831
)
 
 
(1,935
)
SQM Eastmed Turkey
 
 
(113
)
 
 
(92
)
 
 
(95
)
Charlee SQM (Thailand) Co. Ltd.
 
 
-
 
 
 
(285
)
 
 
(460
)
Coromandel SQM India
 
 
(393
)
 
 
(234
)
 
 
(282
)
SQM Italia SRL
 
 
(213
)
 
 
(154
)
 
 
(287
)
SQM Oceanía Pty Ltd.
 
 
(634
)
 
 
(634
)
 
 
(634
)
SQM Indonesia S.A.
 
 
(124
)
 
 
(124
)
 
 
(124
)
Abu Dhabi Fertillizers Industries WWL.
 
 
(435
)
 
 
(435
)
 
 
(434
)
SQM Vitas Holland
 
 
(170
)
 
 
(101
)
 
 
(280
)
SQM Thailand Limited
 
 
(68
)
 
 
(68
)
 
 
(68
)
SQM Europe
 
 
(1,983
)
 
 
(1,550
)
 
 
(1,550
)
Minera Exar S.A.
 
 
-
 
 
 
(5,209
)
 
 
-
 
SQM Australia Pty Ltd.
 
 
(4,222
)
 
 
154
 
 
 
-
 
Pavoni & C. Spa
 
 
70
 
 
 
-
 
 
 
-
 
Terra Tarsa BV
 
 
(82
)
 
 
-
 
 
 
-
 
Plantacote NV
 
 
(34
)
 
 
-
 
 
 
-
 
Doktolab Tarim Arastirma San.
 
 
(29
)
 
 
-
 
 
 
-
 
Kore Potash PLC (a)
 
 
(1,206
)
 
 
-
 
 
 
-
 
SQM Colombia SAS
 
 
(94
)
 
 
-
 
 
 
-
 
Total
 
 
(26,307
)
 
 
(24,913
)
 
 
(19,463
)