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Right-of-use assets and Lease liabilities - Details of Current Lease Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities $ 12,149 $ 7,704  
Nominal amounts      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 13,939 8,881  
Nominal amounts | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 3,565 2,367  
Nominal amounts | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 10,374 6,514  
Nominal amounts | SQM Salar S.A. | Empresa Constructora Contex Ltda      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 2,159 2,158  
Nominal amounts | SQM Salar S.A. | Empresa Constructora Contex Ltda | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 540 540  
Nominal amounts | SQM Salar S.A. | Empresa Constructora Contex Ltda | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1,619 1,618  
Nominal amounts | SQM Salar S.A. | Maquinarias Industriales Astudillo Hermanos Ltda.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 400 193  
Nominal amounts | SQM Salar S.A. | Maquinarias Industriales Astudillo Hermanos Ltda. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 100 48  
Nominal amounts | SQM Salar S.A. | Maquinarias Industriales Astudillo Hermanos Ltda. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 300 145  
Nominal amounts | SQM Salar S.A. | SKM Industrial Ltda      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   337  
Nominal amounts | SQM Salar S.A. | SKM Industrial Ltda | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   202  
Nominal amounts | SQM Salar S.A. | SKM Industrial Ltda | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   135  
Nominal amounts | SQM Salar S.A. | Maquinarias Industriales Astudillo Hermanos Ltda. One      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 193 400  
Nominal amounts | SQM Salar S.A. | Maquinarias Industriales Astudillo Hermanos Ltda. One | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 48 100  
Nominal amounts | SQM Salar S.A. | Maquinarias Industriales Astudillo Hermanos Ltda. One | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 145 300  
Nominal amounts | SQM Salar S.A. | Sociedad Inmobiliaria Amaru SpA      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 98 195  
Nominal amounts | SQM Salar S.A. | Sociedad Inmobiliaria Amaru SpA | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 49 49  
Nominal amounts | SQM Salar S.A. | Sociedad Inmobiliaria Amaru SpA | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 49 146  
Nominal amounts | SQM Salar S.A. | Maquinarias Industriales Astudillo Hermanos Ltda. Two      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 31 31  
Nominal amounts | SQM Salar S.A. | Maquinarias Industriales Astudillo Hermanos Ltda. Two | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 8 8  
Nominal amounts | SQM Salar S.A. | Maquinarias Industriales Astudillo Hermanos Ltda. Two | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 23 23  
Nominal amounts | SQM Salar S.A. | Inversiones y Gestin New Energy SpA      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 433    
Nominal amounts | SQM Salar S.A. | Inversiones y Gestin New Energy SpA | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 108    
Nominal amounts | SQM Salar S.A. | Inversiones y Gestin New Energy SpA | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 325    
Nominal amounts | SQM Salar S.A. | Tatersall Maquinarias S.A.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 219    
Nominal amounts | SQM Salar S.A. | Tatersall Maquinarias S.A. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 55    
Nominal amounts | SQM Salar S.A. | Tatersall Maquinarias S.A. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 164    
Nominal amounts | SQM Salar S.A. | Obras y Servicios para la Industria y Mineria S.A.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1,176    
Nominal amounts | SQM Salar S.A. | Obras y Servicios para la Industria y Mineria S.A. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 294    
Nominal amounts | SQM Salar S.A. | Obras y Servicios para la Industria y Mineria S.A. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 882    
Nominal amounts | SQM Salar S.A. | Sociedad Comercial Grandleasing Chile Ltda      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 79    
Nominal amounts | SQM Salar S.A. | Sociedad Comercial Grandleasing Chile Ltda | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 20    
Nominal amounts | SQM Salar S.A. | Sociedad Comercial Grandleasing Chile Ltda | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 59    
Nominal amounts | SQM Salar S.A. | Jungheinrich Rentalif SPA      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 520    
Nominal amounts | SQM Salar S.A. | Jungheinrich Rentalif SPA | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 130    
Nominal amounts | SQM Salar S.A. | Jungheinrich Rentalif SPA | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 390    
Nominal amounts | SQM Industrial S.A. | El Trovador S.A.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1,865 1,865  
Nominal amounts | SQM Industrial S.A. | El Trovador S.A. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 466 466  
Nominal amounts | SQM Industrial S.A. | El Trovador S.A. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1,399 1,399  
Nominal amounts | SQM Industrial S.A. | Sociedad Comercial Grandleasing Chile Ltda      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 720 721  
Nominal amounts | SQM Industrial S.A. | Sociedad Comercial Grandleasing Chile Ltda | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 180 180  
Nominal amounts | SQM Industrial S.A. | Sociedad Comercial Grandleasing Chile Ltda | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 540 541  
Nominal amounts | SQM Industrial S.A. | Jungheinrich Rentalif SPA      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 118 118  
Nominal amounts | SQM Industrial S.A. | Jungheinrich Rentalif SPA | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 30 30  
Nominal amounts | SQM Industrial S.A. | Jungheinrich Rentalif SPA | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 88 88  
Nominal amounts | SQM Industrial S.A. | Technofast      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   74  
Nominal amounts | SQM Industrial S.A. | Technofast | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   18  
Nominal amounts | SQM Industrial S.A. | Technofast | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   56  
Nominal amounts | SQM Nitratos S.A. | Jungheinrich Rentalif SPA      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 73 73  
Nominal amounts | SQM Nitratos S.A. | Jungheinrich Rentalif SPA | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 18 18  
Nominal amounts | SQM Nitratos S.A. | Jungheinrich Rentalif SPA | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 55 55  
Nominal amounts | SQM S.A. | Jungheinrich Rentalif SPA      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 79 79  
Nominal amounts | SQM S.A. | Jungheinrich Rentalif SPA | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 20 20  
Nominal amounts | SQM S.A. | Jungheinrich Rentalif SPA | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 59 59  
Nominal amounts | Orcoma Estudios SPA | Obispado de Iquique      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 5 5  
Nominal amounts | Orcoma Estudios SPA | Obispado de Iquique | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1 1  
Nominal amounts | Orcoma Estudios SPA | Obispado de Iquique | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 4 4  
Nominal amounts | Orcoma Estudios SPA | Comunidad Indgena Aymara Pueblo de Pisiga Choque      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 5 6  
Nominal amounts | Orcoma Estudios SPA | Comunidad Indgena Aymara Pueblo de Pisiga Choque | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1 1  
Nominal amounts | Orcoma Estudios SPA | Comunidad Indgena Aymara Pueblo de Pisiga Choque | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 4 5  
Nominal amounts | Orcoma Estudios SPA | Ruth del Carmen Cortez Maturana      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 4 4  
Nominal amounts | Orcoma Estudios SPA | Ruth del Carmen Cortez Maturana | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1 1  
Nominal amounts | Orcoma Estudios SPA | Ruth del Carmen Cortez Maturana | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 3 3  
Nominal amounts | Soquimich Comercial S.A. | Containers Operators S.A.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   343  
Nominal amounts | Soquimich Comercial S.A. | Containers Operators S.A. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   86  
Nominal amounts | Soquimich Comercial S.A. | Containers Operators S.A. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   257  
Nominal amounts | Soquimich Comercial S.A. | Muelles de Penco S.A.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 266 165  
Nominal amounts | Soquimich Comercial S.A. | Muelles de Penco S.A. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 84 41  
Nominal amounts | Soquimich Comercial S.A. | Muelles de Penco S.A. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 182 124  
Nominal amounts | Soquimich Comercial S.A. | Muelles de Penco S.A. one      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 102 178  
Nominal amounts | Soquimich Comercial S.A. | Muelles de Penco S.A. one | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 43 44  
Nominal amounts | Soquimich Comercial S.A. | Muelles de Penco S.A. one | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 59 134  
Nominal amounts | Soquimich Comercial S.A. | Inmobiliaria Chincui SPA      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 628 628  
Nominal amounts | Soquimich Comercial S.A. | Inmobiliaria Chincui SPA | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 157 157  
Nominal amounts | Soquimich Comercial S.A. | Inmobiliaria Chincui SPA | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 471 471  
Nominal amounts | Soquimich Comercial S.A. | Compaa de Leasing Tattersall S.A.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 232 232  
Nominal amounts | Soquimich Comercial S.A. | Compaa de Leasing Tattersall S.A. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 58 58  
Nominal amounts | Soquimich Comercial S.A. | Compaa de Leasing Tattersall S.A. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 174 174  
Nominal amounts | SQM North America Corp. | Paces West LL.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 229 223  
Nominal amounts | SQM North America Corp. | Paces West LL. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 56 55  
Nominal amounts | SQM North America Corp. | Paces West LL. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 173 168  
Nominal amounts | SQM North America Corp. | Deep South Equipment Company      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 5 5  
Nominal amounts | SQM North America Corp. | Deep South Equipment Company | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1 1  
Nominal amounts | SQM North America Corp. | Deep South Equipment Company | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 4 4  
Nominal amounts | SQM North America Corp. | Hawkins Nunmber One, LLC      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 134 130  
Nominal amounts | SQM North America Corp. | Hawkins Nunmber One, LLC | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 34 32  
Nominal amounts | SQM North America Corp. | Hawkins Nunmber One, LLC | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 100 98  
Nominal amounts | SQM North America Corp. | Tennant-South      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 2 6  
Nominal amounts | SQM North America Corp. | Tennant-South | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1 2  
Nominal amounts | SQM North America Corp. | Tennant-South | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1 4  
Nominal amounts | SQM North America Corp. | Deacon Jones CDJR      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 8    
Nominal amounts | SQM North America Corp. | Deacon Jones CDJR | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 2    
Nominal amounts | SQM North America Corp. | Deacon Jones CDJR | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 6    
Nominal amounts | SQM North America Corp. | Berwyn Partners Inc.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 8    
Nominal amounts | SQM North America Corp. | Berwyn Partners Inc. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 2    
Nominal amounts | SQM North America Corp. | Berwyn Partners Inc. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 6    
Nominal amounts | SQM North America Corp. | Myers Ford Co Inc.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 8    
Nominal amounts | SQM North America Corp. | Myers Ford Co Inc. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 2    
Nominal amounts | SQM North America Corp. | Myers Ford Co Inc. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 6    
Nominal amounts | SQM North America Corp. | Ford Motor Credit Company      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 7    
Nominal amounts | SQM North America Corp. | Ford Motor Credit Company | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 2    
Nominal amounts | SQM North America Corp. | Ford Motor Credit Company | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 5    
Nominal amounts | SQM North America Corp. | Porter and Howard INC.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 5    
Nominal amounts | SQM North America Corp. | Porter and Howard INC. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1    
Nominal amounts | SQM North America Corp. | Porter and Howard INC. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 4    
Nominal amounts | SQM North America Corp. | Hanford Chrysler Dodge Jeep      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 4    
Nominal amounts | SQM North America Corp. | Hanford Chrysler Dodge Jeep | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1    
Nominal amounts | SQM North America Corp. | Hanford Chrysler Dodge Jeep | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 3    
Nominal amounts | SQM Comercial de Mexico S.A. de C.V. | Onni Ensenada S.A. de C.V.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 395 395  
Nominal amounts | SQM Comercial de Mexico S.A. de C.V. | Onni Ensenada S.A. de C.V. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 99 99  
Nominal amounts | SQM Comercial de Mexico S.A. de C.V. | Onni Ensenada S.A. de C.V. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 296 296  
Nominal amounts | SQM Comercial de Mexico S.A. de C.V. | Madol Inmobiliaria S.A. de C.V.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 66 78  
Nominal amounts | SQM Comercial de Mexico S.A. de C.V. | Madol Inmobiliaria S.A. de C.V. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 20 20  
Nominal amounts | SQM Comercial de Mexico S.A. de C.V. | Madol Inmobiliaria S.A. de C.V. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 46 58  
Nominal amounts | SQM Comercial de Mexico S.A. de C.V. | Madol Inmobiliaria S.A. de C.V. one      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 23 28  
Nominal amounts | SQM Comercial de Mexico S.A. de C.V. | Madol Inmobiliaria S.A. de C.V. one | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 7 7  
Nominal amounts | SQM Comercial de Mexico S.A. de C.V. | Madol Inmobiliaria S.A. de C.V. one | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 16 21  
Nominal amounts | SQM Europe NV | Straatsburgdok N.V.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 408 408  
Nominal amounts | SQM Europe NV | Straatsburgdok N.V. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 102 102  
Nominal amounts | SQM Europe NV | Straatsburgdok N.V. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 306 306  
Nominal amounts | SQM Australia PTY | Ausco Modular Pty Limited      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 15 34  
Nominal amounts | SQM Australia PTY | Ausco Modular Pty Limited | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 15 9  
Nominal amounts | SQM Australia PTY | Ausco Modular Pty Limited | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 0 25  
Nominal amounts | SQM Australia PTY | Western Australian Land Authority      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 492 279  
Nominal amounts | SQM Australia PTY | Western Australian Land Authority | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 105 52  
Nominal amounts | SQM Australia PTY | Western Australian Land Authority | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 387 227  
Nominal amounts | SQM Australia PTY | Kwinana Refinery Lease - Laydown Area      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 99    
Nominal amounts | SQM Australia PTY | Kwinana Refinery Lease - Laydown Area | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 25    
Nominal amounts | SQM Australia PTY | Kwinana Refinery Lease - Laydown Area | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 74    
Nominal amounts | SQM Australia PTY | Mining Thiess Pty Ltd.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 2,468    
Nominal amounts | SQM Australia PTY | Mining Thiess Pty Ltd. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 640    
Nominal amounts | SQM Australia PTY | Mining Thiess Pty Ltd. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1,828    
Nominal amounts | SQM Australia PTY | Project JV      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 88    
Nominal amounts | SQM Australia PTY | Project JV | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 22    
Nominal amounts | SQM Australia PTY | Project JV | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 66    
Nominal amounts | SQM Australia PTY | Eagle Petroleum (WA) Pty Ltd      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   11  
Nominal amounts | SQM Australia PTY | Eagle Petroleum (WA) Pty Ltd | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   5  
Nominal amounts | SQM Australia PTY | Eagle Petroleum (WA) Pty Ltd | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   6  
Nominal amounts | SQM Australia PTY | Knight Frank      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   12  
Nominal amounts | SQM Australia PTY | Knight Frank | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   12  
Nominal amounts | SQM Australia PTY | Knight Frank | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   0  
Nominal amounts | SQM Colombia S.A.S. | Mareauto Colombia S.A.S.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 5 6  
Nominal amounts | SQM Colombia S.A.S. | Mareauto Colombia S.A.S. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1 2  
Nominal amounts | SQM Colombia S.A.S. | Mareauto Colombia S.A.S. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 4 4  
Nominal amounts | SQM Colombia S.A.S. | Renting Colombia S.A.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 8 9  
Nominal amounts | SQM Colombia S.A.S. | Renting Colombia S.A. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 2 2  
Nominal amounts | SQM Colombia S.A.S. | Renting Colombia S.A. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 6 7  
Nominal amounts | SQM Colombia S.A.S. | Renting Colombia S.A.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 9 10  
Nominal amounts | SQM Colombia S.A.S. | Renting Colombia S.A. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 2 3  
Nominal amounts | SQM Colombia S.A.S. | Renting Colombia S.A. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 7 7  
Nominal amounts | SQM Africa Pty | Goscor Finance (Pty) Ltd      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 48    
Nominal amounts | SQM Africa Pty | Goscor Finance (Pty) Ltd | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 12    
Nominal amounts | SQM Africa Pty | Goscor Finance (Pty) Ltd | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 36    
Amounts at amortized cost      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 12,149 7,704  
Amounts at amortized cost | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 3,108 2,009  
Amounts at amortized cost | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 9,041 5,695  
Amounts at amortized cost | SQM Salar S.A. | Empresa Constructora Contex Ltda      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1,965 1,864  
Amounts at amortized cost | SQM Salar S.A. | Empresa Constructora Contex Ltda | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 482 457  
Amounts at amortized cost | SQM Salar S.A. | Empresa Constructora Contex Ltda | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1,483   $ 1,407
Amounts at amortized cost | SQM Salar S.A. | Maquinarias Industriales Astudillo Hermanos Ltda.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 372 175  
Amounts at amortized cost | SQM Salar S.A. | Maquinarias Industriales Astudillo Hermanos Ltda. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 92 43  
Amounts at amortized cost | SQM Salar S.A. | Maquinarias Industriales Astudillo Hermanos Ltda. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 280 132  
Amounts at amortized cost | SQM Salar S.A. | SKM Industrial Ltda      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   330  
Amounts at amortized cost | SQM Salar S.A. | SKM Industrial Ltda | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   197  
Amounts at amortized cost | SQM Salar S.A. | SKM Industrial Ltda | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   133  
Amounts at amortized cost | SQM Salar S.A. | Maquinarias Industriales Astudillo Hermanos Ltda. One      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 180 361  
Amounts at amortized cost | SQM Salar S.A. | Maquinarias Industriales Astudillo Hermanos Ltda. One | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 44 89  
Amounts at amortized cost | SQM Salar S.A. | Maquinarias Industriales Astudillo Hermanos Ltda. One | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 136 272  
Amounts at amortized cost | SQM Salar S.A. | Sociedad Inmobiliaria Amaru SpA      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 98 191  
Amounts at amortized cost | SQM Salar S.A. | Sociedad Inmobiliaria Amaru SpA | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 49 47  
Amounts at amortized cost | SQM Salar S.A. | Sociedad Inmobiliaria Amaru SpA | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 49 144  
Amounts at amortized cost | SQM Salar S.A. | Maquinarias Industriales Astudillo Hermanos Ltda. Two      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 28 27  
Amounts at amortized cost | SQM Salar S.A. | Maquinarias Industriales Astudillo Hermanos Ltda. Two | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 7 7  
Amounts at amortized cost | SQM Salar S.A. | Maquinarias Industriales Astudillo Hermanos Ltda. Two | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 21 20  
Amounts at amortized cost | SQM Salar S.A. | Inversiones y Gestin New Energy SpA      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 433    
Amounts at amortized cost | SQM Salar S.A. | Inversiones y Gestin New Energy SpA | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 108    
Amounts at amortized cost | SQM Salar S.A. | Inversiones y Gestin New Energy SpA | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 325    
Amounts at amortized cost | SQM Salar S.A. | Tatersall Maquinarias S.A.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 190    
Amounts at amortized cost | SQM Salar S.A. | Tatersall Maquinarias S.A. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 47    
Amounts at amortized cost | SQM Salar S.A. | Tatersall Maquinarias S.A. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 143    
Amounts at amortized cost | SQM Salar S.A. | Obras y Servicios para la Industria y Mineria S.A.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1,077    
Amounts at amortized cost | SQM Salar S.A. | Obras y Servicios para la Industria y Mineria S.A. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 267    
Amounts at amortized cost | SQM Salar S.A. | Obras y Servicios para la Industria y Mineria S.A. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 810    
Amounts at amortized cost | SQM Salar S.A. | Sociedad Comercial Grandleasing Chile Ltda      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 79    
Amounts at amortized cost | SQM Salar S.A. | Sociedad Comercial Grandleasing Chile Ltda | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 20    
Amounts at amortized cost | SQM Salar S.A. | Sociedad Comercial Grandleasing Chile Ltda | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 59    
Amounts at amortized cost | SQM Salar S.A. | Jungheinrich Rentalif SPA      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 452    
Amounts at amortized cost | SQM Salar S.A. | Jungheinrich Rentalif SPA | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 112    
Amounts at amortized cost | SQM Salar S.A. | Jungheinrich Rentalif SPA | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 340    
Amounts at amortized cost | SQM Industrial S.A. | El Trovador S.A.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1,520 1,474  
Amounts at amortized cost | SQM Industrial S.A. | El Trovador S.A. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 376 364  
Amounts at amortized cost | SQM Industrial S.A. | El Trovador S.A. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1,144 1,110  
Amounts at amortized cost | SQM Industrial S.A. | Sociedad Comercial Grandleasing Chile Ltda      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 699 680  
Amounts at amortized cost | SQM Industrial S.A. | Sociedad Comercial Grandleasing Chile Ltda | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 173 168  
Amounts at amortized cost | SQM Industrial S.A. | Sociedad Comercial Grandleasing Chile Ltda | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 526 512  
Amounts at amortized cost | SQM Industrial S.A. | Jungheinrich Rentalif SPA      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 113 109  
Amounts at amortized cost | SQM Industrial S.A. | Jungheinrich Rentalif SPA | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 28 27  
Amounts at amortized cost | SQM Industrial S.A. | Jungheinrich Rentalif SPA | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 85 82  
Amounts at amortized cost | SQM Industrial S.A. | Technofast      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   73  
Amounts at amortized cost | SQM Industrial S.A. | Technofast | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   18  
Amounts at amortized cost | SQM Industrial S.A. | Technofast | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   55  
Amounts at amortized cost | SQM Nitratos S.A. | Jungheinrich Rentalif SPA      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 69 67  
Amounts at amortized cost | SQM Nitratos S.A. | Jungheinrich Rentalif SPA | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 17 17  
Amounts at amortized cost | SQM Nitratos S.A. | Jungheinrich Rentalif SPA | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 52 50  
Amounts at amortized cost | SQM S.A. | Jungheinrich Rentalif SPA      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 73 73  
Amounts at amortized cost | SQM S.A. | Jungheinrich Rentalif SPA | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 18 18  
Amounts at amortized cost | SQM S.A. | Jungheinrich Rentalif SPA | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 55 55  
Amounts at amortized cost | Orcoma Estudios SPA | Obispado de Iquique      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 3 2  
Amounts at amortized cost | Orcoma Estudios SPA | Obispado de Iquique | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1 1  
Amounts at amortized cost | Orcoma Estudios SPA | Obispado de Iquique | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 2 1  
Amounts at amortized cost | Orcoma Estudios SPA | Comunidad Indgena Aymara Pueblo de Pisiga Choque      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 5 5  
Amounts at amortized cost | Orcoma Estudios SPA | Comunidad Indgena Aymara Pueblo de Pisiga Choque | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1 1  
Amounts at amortized cost | Orcoma Estudios SPA | Comunidad Indgena Aymara Pueblo de Pisiga Choque | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 4 4  
Amounts at amortized cost | Orcoma Estudios SPA | Ruth del Carmen Cortez Maturana      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 3 2  
Amounts at amortized cost | Orcoma Estudios SPA | Ruth del Carmen Cortez Maturana | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1 1  
Amounts at amortized cost | Orcoma Estudios SPA | Ruth del Carmen Cortez Maturana | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 2 1  
Amounts at amortized cost | Soquimich Comercial S.A. | Containers Operators S.A.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   342  
Amounts at amortized cost | Soquimich Comercial S.A. | Containers Operators S.A. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   85  
Amounts at amortized cost | Soquimich Comercial S.A. | Containers Operators S.A. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   257  
Amounts at amortized cost | Soquimich Comercial S.A. | Muelles de Penco S.A.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 242 163  
Amounts at amortized cost | Soquimich Comercial S.A. | Muelles de Penco S.A. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 77 41  
Amounts at amortized cost | Soquimich Comercial S.A. | Muelles de Penco S.A. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 165 122  
Amounts at amortized cost | Soquimich Comercial S.A. | Muelles de Penco S.A. one      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 103 175  
Amounts at amortized cost | Soquimich Comercial S.A. | Muelles de Penco S.A. one | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 44 44  
Amounts at amortized cost | Soquimich Comercial S.A. | Muelles de Penco S.A. one | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 59 131  
Amounts at amortized cost | Soquimich Comercial S.A. | Inmobiliaria Chincui SPA      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 532 515  
Amounts at amortized cost | Soquimich Comercial S.A. | Inmobiliaria Chincui SPA | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 131 127  
Amounts at amortized cost | Soquimich Comercial S.A. | Inmobiliaria Chincui SPA | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 401 388  
Amounts at amortized cost | Soquimich Comercial S.A. | Compaa de Leasing Tattersall S.A.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 219 213  
Amounts at amortized cost | Soquimich Comercial S.A. | Compaa de Leasing Tattersall S.A. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 54 52  
Amounts at amortized cost | Soquimich Comercial S.A. | Compaa de Leasing Tattersall S.A. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 165 161  
Amounts at amortized cost | SQM North America Corp. | Paces West LL.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 195 182  
Amounts at amortized cost | SQM North America Corp. | Paces West LL. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 47 44  
Amounts at amortized cost | SQM North America Corp. | Paces West LL. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 148 138  
Amounts at amortized cost | SQM North America Corp. | Deep South Equipment Company      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 5 5  
Amounts at amortized cost | SQM North America Corp. | Deep South Equipment Company | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1 1  
Amounts at amortized cost | SQM North America Corp. | Deep South Equipment Company | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 4 4  
Amounts at amortized cost | SQM North America Corp. | Hawkins Nunmber One, LLC      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 128 121  
Amounts at amortized cost | SQM North America Corp. | Hawkins Nunmber One, LLC | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 31 30  
Amounts at amortized cost | SQM North America Corp. | Hawkins Nunmber One, LLC | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 97 91  
Amounts at amortized cost | SQM North America Corp. | Tennant-South      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 3 6  
Amounts at amortized cost | SQM North America Corp. | Tennant-South | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 2 1  
Amounts at amortized cost | SQM North America Corp. | Tennant-South | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1 5  
Amounts at amortized cost | SQM North America Corp. | Deacon Jones CDJR      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 8    
Amounts at amortized cost | SQM North America Corp. | Deacon Jones CDJR | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 2    
Amounts at amortized cost | SQM North America Corp. | Deacon Jones CDJR | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 6    
Amounts at amortized cost | SQM North America Corp. | Berwyn Partners Inc.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 8    
Amounts at amortized cost | SQM North America Corp. | Berwyn Partners Inc. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 2    
Amounts at amortized cost | SQM North America Corp. | Berwyn Partners Inc. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 6    
Amounts at amortized cost | SQM North America Corp. | Myers Ford Co Inc.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 7    
Amounts at amortized cost | SQM North America Corp. | Myers Ford Co Inc. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 2    
Amounts at amortized cost | SQM North America Corp. | Myers Ford Co Inc. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 5    
Amounts at amortized cost | SQM North America Corp. | Ford Motor Credit Company      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 7    
Amounts at amortized cost | SQM North America Corp. | Ford Motor Credit Company | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 2    
Amounts at amortized cost | SQM North America Corp. | Ford Motor Credit Company | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 5    
Amounts at amortized cost | SQM North America Corp. | Porter and Howard INC.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 4    
Amounts at amortized cost | SQM North America Corp. | Porter and Howard INC. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1    
Amounts at amortized cost | SQM North America Corp. | Porter and Howard INC. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 3    
Amounts at amortized cost | SQM North America Corp. | Hanford Chrysler Dodge Jeep      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 5    
Amounts at amortized cost | SQM North America Corp. | Hanford Chrysler Dodge Jeep | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1    
Amounts at amortized cost | SQM North America Corp. | Hanford Chrysler Dodge Jeep | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 4    
Amounts at amortized cost | SQM Comercial de Mexico S.A. de C.V. | Onni Ensenada S.A. de C.V.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 350 338  
Amounts at amortized cost | SQM Comercial de Mexico S.A. de C.V. | Onni Ensenada S.A. de C.V. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 86 84  
Amounts at amortized cost | SQM Comercial de Mexico S.A. de C.V. | Onni Ensenada S.A. de C.V. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 264 254  
Amounts at amortized cost | SQM Comercial de Mexico S.A. de C.V. | Madol Inmobiliaria S.A. de C.V.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 62 70  
Amounts at amortized cost | SQM Comercial de Mexico S.A. de C.V. | Madol Inmobiliaria S.A. de C.V. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 18 17  
Amounts at amortized cost | SQM Comercial de Mexico S.A. de C.V. | Madol Inmobiliaria S.A. de C.V. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 44 53  
Amounts at amortized cost | SQM Comercial de Mexico S.A. de C.V. | Madol Inmobiliaria S.A. de C.V. one      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 23 25  
Amounts at amortized cost | SQM Comercial de Mexico S.A. de C.V. | Madol Inmobiliaria S.A. de C.V. one | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 7 6  
Amounts at amortized cost | SQM Comercial de Mexico S.A. de C.V. | Madol Inmobiliaria S.A. de C.V. one | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 16 19  
Amounts at amortized cost | SQM Europe NV | Straatsburgdok N.V.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 386 383  
Amounts at amortized cost | SQM Europe NV | Straatsburgdok N.V. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 96 95  
Amounts at amortized cost | SQM Europe NV | Straatsburgdok N.V. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 290 288  
Amounts at amortized cost | SQM Australia PTY | Ausco Modular Pty Limited      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 14 32  
Amounts at amortized cost | SQM Australia PTY | Ausco Modular Pty Limited | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 14 8  
Amounts at amortized cost | SQM Australia PTY | Ausco Modular Pty Limited | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 0 24  
Amounts at amortized cost | SQM Australia PTY | Western Australian Land Authority      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 148 347  
Amounts at amortized cost | SQM Australia PTY | Western Australian Land Authority | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 54 103  
Amounts at amortized cost | SQM Australia PTY | Western Australian Land Authority | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 94 244  
Amounts at amortized cost | SQM Australia PTY | Kwinana Refinery Lease - Laydown Area      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 94    
Amounts at amortized cost | SQM Australia PTY | Kwinana Refinery Lease - Laydown Area | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 23    
Amounts at amortized cost | SQM Australia PTY | Kwinana Refinery Lease - Laydown Area | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 71    
Amounts at amortized cost | SQM Australia PTY | Mining Thiess Pty Ltd.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 2,111    
Amounts at amortized cost | SQM Australia PTY | Mining Thiess Pty Ltd. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 538    
Amounts at amortized cost | SQM Australia PTY | Mining Thiess Pty Ltd. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1,573    
Amounts at amortized cost | SQM Australia PTY | Project JV      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 79    
Amounts at amortized cost | SQM Australia PTY | Project JV | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 19    
Amounts at amortized cost | SQM Australia PTY | Project JV | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 60    
Amounts at amortized cost | SQM Australia PTY | Eagle Petroleum (WA) Pty Ltd      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   11  
Amounts at amortized cost | SQM Australia PTY | Eagle Petroleum (WA) Pty Ltd | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   3  
Amounts at amortized cost | SQM Australia PTY | Eagle Petroleum (WA) Pty Ltd | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   8  
Amounts at amortized cost | SQM Australia PTY | Knight Frank      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   12  
Amounts at amortized cost | SQM Australia PTY | Knight Frank | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   12  
Amounts at amortized cost | SQM Australia PTY | Knight Frank | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities   0  
Amounts at amortized cost | SQM Colombia S.A.S. | Mareauto Colombia S.A.S.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 5 6  
Amounts at amortized cost | SQM Colombia S.A.S. | Mareauto Colombia S.A.S. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 1 2  
Amounts at amortized cost | SQM Colombia S.A.S. | Mareauto Colombia S.A.S. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 4 4  
Amounts at amortized cost | SQM Colombia S.A.S. | Renting Colombia S.A.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 8 9  
Amounts at amortized cost | SQM Colombia S.A.S. | Renting Colombia S.A. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 2 2  
Amounts at amortized cost | SQM Colombia S.A.S. | Renting Colombia S.A. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 6 7  
Amounts at amortized cost | SQM Colombia S.A.S. | Renting Colombia S.A.      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 9 10  
Amounts at amortized cost | SQM Colombia S.A.S. | Renting Colombia S.A. | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 2 3  
Amounts at amortized cost | SQM Colombia S.A.S. | Renting Colombia S.A. | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 7 $ 7  
Amounts at amortized cost | SQM Africa Pty | Goscor Finance (Pty) Ltd      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 35    
Amounts at amortized cost | SQM Africa Pty | Goscor Finance (Pty) Ltd | Later than three months      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities 8    
Amounts at amortized cost | SQM Africa Pty | Goscor Finance (Pty) Ltd | Later than three months and not later than one year      
Disclosure of quantitative information about right-of-use assets [line items]      
Current lease liabilities $ 27