Disclosure Of Financials instruments [Abstract]

Disclosure of detailed information about other non current financial assets [Text Block]

Institution	As of December 31, 2020		As of December 31, 2019
	ThUS$		ThUS$
Banco de Crédito e Inversiones		185,589		185,400
Banco Santander (3)		45,168		74,365
Banco Itau Corpbanca		49,006		120,628
Banco Security		-		17,964
Banco de Chile		-		18,026
Banco Estado		-		15,126
Scotiabank Sud Americano		31,668		54,180
JP Morgan Asset Management		34,028		-
Total		345,459		485,689

(1)

Corresponds to term deposits whose maturity date is greater than 90 days and less than 360 days from the investment date constituted in the aforementioned financial institutions:

(2)

Correspond to forwards and options that were not classified as hedging instruments (See detail in Note 13.3).

(3)

As of December 31, 2020, there were no margin calls and as of December 31, 2019, this value was ThUS$ 1,870.

Disclosure of financial assets that are either past due or impaired [text block]

As of December 31, 2020, and December 31, 2019 the detail of the renegotiated portfolio is as follows:

As of December 31, 2020
Portfolio analysis
Past due segments	Number of customers with non- renegotiated portfolio		Gross non-renegotiated portfolio ThUS$		Number of customers with renegotiated portfolio		Gross renegotiated portfolio ThUS$
Current		1,281		301,939		23		179
1 - 30 days		119		12,140		8		60
31 - 60 days		12		1,226		-		-
61 - 90 days		5		159		-		-
91 - 120 days		5		1,448		1		41
121 - 150 days		2		2,384		2		2
151 - 180 days		3		1,398		4		12
181 - 210 days		1		-		2		5
211 - 250 days		3		2		6		114
>250 days		156		5,030		64		1,447
Total		1,587		325,726		110		1,860

As of December 31, 2019
Portfolio analysis
Past due segments	Number of customers non- renegotiated portfolio		Gross non-renegotiated portfolio ThUS$		Number of customers renegotiated portfolio		Gross renegotiated portfolio ThUS$
Current		1,486		351,931		69		892
1 - 30 days		166		20,195		72		526
31 - 60 days		26		1,279		4		10
61 - 90 days		12		519		3		54
91 - 120 days		5		1,026		2		66
121 - 150 days		5		361		7		49
151 - 180 days		7		190		2		33
181 - 210 days		4		51		-		-
211 - 250 days		6		48		8		11
>250 days		144		5,449		137		1,085
Total		1,861		381,049		304		2,726

Disclosure of detailed information about movement in provision of trade receivables [Table Text Block]

As of December 31, 2020, and December 31, 2019, movements in provisions are as follows:

Provisions	As of December 31, 2020			As of December 31, 2019
	ThUS$			ThUS$
Provision Impairment Accounts receivable at the beginning of the Period		32,707			32,634
(Decrease) increase impairment of accounts receivable		(4,684	)		1,057
Use of Provision Applied to Accounts Receivable		(750	)		(984	)
Impairment of Accounts Receivable Provision at the end of the Period		27,273			32,707
(1) Trade and Other Receivables Provision		14,321			16,192
(2) Current other Receivables Provision		5,407			5,192
(3) Provision Trade payables due to related parties, current		7,545			11,323
Recovery of Insurance		347			320

Impairment of Accounts Receivable Provision		27,273			32,707
Renegotiated Provision		1,728			1,905
Non-renegotiated Provision		25,545			30,802

Disclosure of maturity analysis for derivative financial liabilities [text block]

Derivative contract maturities are detailed as follows:

Series	Contract amount		Currency	Maturity date
	ThUS$
H		134,049	UF	01/04/2023
O		58,748	UF	02/01/2022
P		134,228	UF	01/15/2028
Q		106,933	UF	06/01/2030

Disclosure of detailed information about borrowings [text block]

As of December 31, 2020, and 2019, the detail is as follows:

Current and non-current bank borrowings	As of December 31, 2020		As of December 31, 2019
	ThUS$		ThUS$
Current loans		82		199
Non-current loans		69,376		69,138
Current and non-current loans		69,458		69,337

Disclosure of detailed information about current maturities of unsecured obligations [Text Block]

As of December 31, 2020, and December 31, 2019, the detail of current unsecured interest-bearing obligations is composed of promissory notes and bonds, as follows:

Debtor

Number of

Currency or

Periodicity

Tax ID No.

Company

Country

registration or ID
of the instrument

Series

Maturity date

adjustment
index

Payment of
interest

Repayment

Effective rate

Nominal rate

93.007.000-9

SQM S.A.

Chile

-

MUS$250

01/28/2021

US$

Semiannual

Upon maturity

1.95%

4.38%

93.007.000-9

SQM S.A.

Chile

-

MUS$300

04/03/2021

US$

Semiannual

Upon maturity

1.08%

3.63%

93.007.000-9

SQM S.A.

Chile

-

MUS$450

05/07/2021

US$

Semiannual

Upon maturity

3.59%

4.25%

93.007.000-9

SQM S.A.

Chile

-

MUS$400

01/22/2021

US$

Semiannual

Upon maturity

4.17%

4.25%

93.007.000-9

SQM S.A.

Chile

564

H

01/05/2021

UF

Semiannual

0.58%

4.90%

93.007.000-9

SQM S.A.

Chile

699

O

02/01/2021

UF

Semiannual

Upon maturity

2.24%

3.80%

93.007.000-9

SQM S.A.

Chile

563

P

01/15/2021

UF

Semiannual

Upon maturity

2.37%

3.25%

93.007.000-9

SQM S.A.

Chile

700

Q

06/01/2021

UF

Semiannual

Upon maturity

2.92%

3.45%

Effective rates of bonds in Pesos and UF are expressed and calculated in Dollars based on the flows agreed in Cross Currency Swap Agreements.

			Nominal amounts as of December 31, 2020						Carrying amounts of maturities as of December 31, 2020
Company	Country	Series	Up to 90 days		90 days to 1 year		Total		Up to 90 days		90 days to 1 year		Subtotal		Borrowing costs			Total
			ThUS$		ThUS$		ThUS$		ThUS$		ThUS$		ThUS$		ThUS$			ThUS$
SQM S.A.	Chile	MUS$250		4,648		-		4,648		4,648		-		4,648		(433	)		4,215
SQM S.A.	Chile	MUS$300		-		2,658		2,658		-		2,658		2,658		(614	)		2,044
SQM S.A.	Chile	MUS$450		7,508		-		7,508		7,508		-		7,508		(679	)		6,829
SQM S.A.	Chile	MUS$400		-		2,869		2,869		-		2,869		2,869		(237	)		2,632
SQM S.A.	Chile	H		18,212		-		18,212		18,212		-		18,212		(172	)		18,040
SQM S.A.	Chile	O		962		-		962		962		-		962		(82	)		880
SQM S.A.	Chile	P		1,824		-		1,824		1,824		-		1,824		(12	)		1,812
SQM S.A.	Chile	Q		-		350		350		-		350		350		(21	)		329
Total				33,154		5,877		39,031		33,154		5,877		39,031		(2,250	)		36,781

Debtor

Number of

Currency or

Periodicity

Tax I No.

Company

Country

registration or ID
of the instrument

Series

Maturity date

adjustment
index

Payment of
interest

Repayment

Effective rate

Nominal rate

93.007.000-9

SQM S.A.

Chile

-

MUS$250

04/21/2020

US$

Semiannual

Upon maturity

0.43%

5.50%

93.007.000-9

SQM S.A.

Chile

-

MUS$250

01/28/2020

US$

Semiannual

Upon maturity

2.35%

4.38

%

93.007.000-9

SQM S.A.

Chile

-

MUS$300

04/03/2020

US$

Semiannual

Upon maturity

1.42

%

3.63

%

93.007.000-9

SQM S.A.

Chile

-

MUS$450

05/07/2020

US$

Semiannual

Upon maturity

4.07

%

4.25

%

93.007.000-9

SQM S.A.

Chile

564

H

01/05/2020

UF

Semiannual

1.36

%

4.90

%

93.007.000-9

SQM S.A.

Chile

699

O

02/01/2020

UF

Semiannual

Upon maturity

2.41

%

3.80

%

93.007.000-9

SQM S.A.

Chile

563

P

01/15/2020

UF

Semiannual

Upon maturity

2.71

%

3.25

%

93.007.000-9

SQM S.A.

Chile

700

Q

06/01/2020

UF

Semiannual

Upon maturity

3.11

%

3.45

%

			Nominal amounts as of December 31, 2019						Carrying amounts of maturities as of December 31, 2019
Company	Country	Series	Up to 90 days		90 days to 1 year		Total		Up to 90 days		90 days to 1 year		Subtotal		Borrowing costs			Total
			ThUS$		ThUS$		ThUS$		ThUS$		ThUS$		ThUS$		ThUS$			ThUS$
SQM S.A.	Chile	MUS$250		-		252,674		252,674		-		252,674		252,674		(386	)		252,288
SQM S.A.	Chile	MUS$250		4,648		-		4,648		4,648		-		4,648		(433	)		4,215
SQM S.A.	Chile	MUS$300		-		2,658		2,658		-		2,658		2,658		(614	)		2,044
SQM S.A.	Chile	MUS$450		-		2,869		2,869		-		2,869		2,869		(679	)		2,190
SQM S.A.	Chile	H		17,166		-		17,166		17,166		-		17,166		(139	)		17,027
SQM S.A.	Chile	O		890		-		890		890		-		890		(67	)		823
SQM S.A.	Chile	P		1,686		-		1,686		1,686		-		1,686		(12	)		1,674
SQM S.A.	Chile	Q		-		323		323		-		323		323		(6	)		317
Total				24,390		258,524		282,914		24,390		258,524		282,914		(2,336	)		280,578

Disclosure of information about issue of series H bonds [Text Block]

For the periods ended December 31, 2020, and December 31, 2019, the Company has made the following payments with a charge to the Series H bonds and their associated CCS hedging:

Payments made	December 31, 2020		December 31, 2019		December 31, 2018
	ThUS$		ThUS$		ThUS$
Payments of interest, Series H bonds		6,601		7,868		8,325
CCS Coverage		2,575		1,952		495

Disclosure of information about issue of series O bonds [Text Block]

For the periods ended December 31, 2020, and December 31, 2019, the Company has made the following payments with a charge to Series O bonds and their associated CCS hedging

Payments made	December 31, 2020		December 31, 2019		December 31, 2018
	ThUS$		ThUS$		ThUS$
Payment of interest, Series O bonds		2,070		2,308		2,457
CCS Coverage		599		354		205

Disclosure of information about fourth issue of single series bonds [Text Block]

For the periods ended on December 31, 2020 and December 31, 2019, the following payments have been made.

Payments made

December 31,

2020

December 31,

2019

December 31,

2018

ThUS$

Payment of interest

10,938

Disclosure of information about issue of series Q bonds [Table Text Block]

For the years ended December 31, 2020 and December 31, 2019, the following payments have been made:

Payments made	December 31, 2020		December 31, 2019		December 31, 2018
	ThUS$		ThUS$		ThUS$
Payment of interest series Q		3,769		3,791		319
CCS Coverage		1,021		-		-

Disclosure of information about sixth issue of single series bonds [Text Block]

Payments made

December 31,

2020

December 31,

2019

December 31,

2018

ThUS$

Payment of interest

8,500

-

Disclosure of detailed information about the current and past due suppliers [Text Block]

As of December 31, 2020, and December 31, 2019, the balance of current and past due accounts payable is made up as follows:

Suppliers current on all payments

	Amounts according to payment periods as of December 31, 2020
Type of Supplier	Up to 30 Days		31 - 60 days		61 - 90 Days		91 - 120 days		121 - 365 days		366 and more days		Total
													ThUS$
Goods		111,323		1,947		123		31		5		4,027		117,456
Services		46,187		1,380		16		757		86		-		48,426
Others		29,325		7		-		-		-		-		29,332
Total		186,835		3,334		139		788		91		4,027		195,214

	Amounts according to payment periods as of December 31, 2019
Type of Supplier	Up to 30 Days		31 - 60 days		61 - 90 Days		91 - 120 days		121 - 365 days		366 and more days		Total
													ThUS$
Goods		126,577		4,655		128		116		2,019		-		133,495
Services		51,785		168		-		-		87		-		52,040
Others		8,741		146		-		-				-		8,887
Total		187,103		4,969		128		116		2,106		-		194,422

Suppliers past due on payments

	Amounts according to payment periods as of December 31, 2020
Type of Supplier	Up to 30 Days		31 - 60 days		61 - 90 Days		91 - 120 days		121 - 365 days		366 and more days		Total
													ThUS$
Goods		1,305		59		47		39		517		-		1,967
Services		2,298		764		-		453		505		-		4,020
Others		3,258		150		371		118		2,275		-		6,172
Total		6,861		973		418		610		3,297		-		12,159

	Amounts according to payment periods as of December 31 2019
Type of Supplier	Up to 30 Days		31 - 60 days		61 - 90 Days		91 - 120 days		121 - 365 days		366 and more days		Total
													ThUS$
Goods		2,086		264		35		65		1,060		-		3,510
Services		3,073		329		116		387		580		-		4,485
Others		1,918		45		311		215		508		-		2,997
Total		7,077		638		462		667		2,148		-		10,992

Disclosure of detailed information about categories of financial liabilities [Text Block]

b)

Financial Liabilities

	As of December 31, 2020						As of December 31, 2019
Description of financial liabilities	Current		Non-current		Total		Current		Non-current		Total
	ThUS$		ThUS$		ThUS$		ThUS$		ThUS$		ThUS$
For hedging purposes through equity		26,699		13,511		40,210		7,183		16,477		23,660
Held for trading at fair value through profit or loss		5,393		-		5,393		3,168		-		3,168
Financial liabilities at fair value through profit or loss		32,092		13,511		45,603		10,351		16,477		26,828
Bank loans		82		69,376		69,458		199		69,138		69,337
Obligations to the public		36,781		1,816,626		1,853,407		280,578		1,403,108		1,683,686
Lease Liabilities		5,528		25,546		31,074		7,694		30,203		37,897
Trade and other payables		203,933		4,027		207,960		205,790		-		205,790
Trade payables due to related parties		606		-		606		475		-		475
Total financial liabilities at amortized cost		246,930		1,915,575		2,162,505		494,736		1,502,449		1,997,185
Total financial liabilities		279,022		1,929,086		2,208,108		505,087		1,518,926		2,024,013