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Right-of-use assets and Lease liabilities (Details 4) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities $ 25,546 $ 30,203
Lease Liabilities At Nominal Amount [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 28,205 33,280
Lease Liabilities At Nominal Amount [Member] | SQM Salar S.A. [Member] | Empresa Constructora Contex Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 554
Lease Liabilities At Nominal Amount [Member] | SQM Salar S.A. [Member] | Transportes Construccin y Servicios Cribach Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | SQM Salar S.A. [Member] | SKM Industrial Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 337 1,147
Lease Liabilities At Nominal Amount [Member] | SQM Salar S.A. [Member] | Ameco Chile SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 135
Lease Liabilities At Nominal Amount [Member] | SQM Industrial S.A. [Member] | El Trovador SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 15,229 16,697
Lease Liabilities At Nominal Amount [Member] | SQM Industrial S.A. [Member] | Sociedad Comercial Grandleasing Chile Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 1,861 2,582
Lease Liabilities At Nominal Amount [Member] | Soquimich Comercial S.A. [Member] | SAAM Logistics SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | Soquimich Comercial S.A. [Member] | Muelles de Penco SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 262 0
Lease Liabilities At Nominal Amount [Member] | Soquimich Comercial S.A. [Member] | Muelles de Penco SA One [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 281 0
Lease Liabilities At Nominal Amount [Member] | Soquimich Comercial S.A. [Member] | Inmobiliaria Chincui SPA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 4,027 4,602
Lease Liabilities At Nominal Amount [Member] | Soquimich Comercial S.A. [Member] | Compaa de Leasing Tattersall SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 73
Lease Liabilities At Nominal Amount [Member] | SQM North America Corp. [Member] | Paces West LL [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 1,440 1,656
Lease Liabilities At Nominal Amount [Member] | SQM North America Corp. [Member] | Hawkins Nunmber One LLC [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 353 481
Lease Liabilities At Nominal Amount [Member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Onni Ensenada SA de CV [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 1,940 2,335
Lease Liabilities At Nominal Amount [Member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Madol Inmobiliaria SA de CV [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 144 222
Lease Liabilities At Nominal Amount [Member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Madol Inmobiliaria SA de CV One [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 52 81
Lease Liabilities At Nominal Amount [Member] | SQM Europe N.V. [Member] | Straatsburgdok NV [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 2,268 2,660
Lease Liabilities At Nominal Amount [Member] | SQM Australia PTY [Member] | The trust Company Australia Pty Ltd [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 11 55
Lease Liabilities At Nominal Amount [Member] | Later than one year and not later than two years [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 9,833 10,890
Lease Liabilities At Nominal Amount [Member] | Later than one year and not later than two years [member] | SQM Salar S.A. [Member] | Empresa Constructora Contex Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 554
Lease Liabilities At Nominal Amount [Member] | Later than one year and not later than two years [member] | SQM Salar S.A. [Member] | Transportes Construccin y Servicios Cribach Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | Later than one year and not later than two years [member] | SQM Salar S.A. [Member] | SKM Industrial Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 337 1,147
Lease Liabilities At Nominal Amount [Member] | Later than one year and not later than two years [member] | SQM Salar S.A. [Member] | Ameco Chile SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 135
Lease Liabilities At Nominal Amount [Member] | Later than one year and not later than two years [member] | SQM Industrial S.A. [Member] | El Trovador SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 3,730 3,730
Lease Liabilities At Nominal Amount [Member] | Later than one year and not later than two years [member] | SQM Industrial S.A. [Member] | Sociedad Comercial Grandleasing Chile Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 1,441 1,441
Lease Liabilities At Nominal Amount [Member] | Later than one year and not later than two years [member] | Soquimich Comercial S.A. [Member] | SAAM Logistics SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | Later than one year and not later than two years [member] | Soquimich Comercial S.A. [Member] | Muelles de Penco SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 262 0
Lease Liabilities At Nominal Amount [Member] | Later than one year and not later than two years [member] | Soquimich Comercial S.A. [Member] | Muelles de Penco SA One [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 281 0
Lease Liabilities At Nominal Amount [Member] | Later than one year and not later than two years [member] | Soquimich Comercial S.A. [Member] | Inmobiliaria Chincui SPA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 1,255 1,255
Lease Liabilities At Nominal Amount [Member] | Later than one year and not later than two years [member] | Soquimich Comercial S.A. [Member] | Compaa de Leasing Tattersall SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 73
Lease Liabilities At Nominal Amount [Member] | Later than one year and not later than two years [member] | SQM North America Corp. [Member] | Paces West LL [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 452 439
Lease Liabilities At Nominal Amount [Member] | Later than one year and not later than two years [member] | SQM North America Corp. [Member] | Hawkins Nunmber One LLC [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 263 257
Lease Liabilities At Nominal Amount [Member] | Later than one year and not later than two years [member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Onni Ensenada SA de CV [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 789 789
Lease Liabilities At Nominal Amount [Member] | Later than one year and not later than two years [member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Madol Inmobiliaria SA de CV [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 144 157
Lease Liabilities At Nominal Amount [Member] | Later than one year and not later than two years [member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Madol Inmobiliaria SA de CV One [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 52 57
Lease Liabilities At Nominal Amount [Member] | Later than one year and not later than two years [member] | SQM Europe N.V. [Member] | Straatsburgdok NV [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 816 801
Lease Liabilities At Nominal Amount [Member] | Later than one year and not later than two years [member] | SQM Australia PTY [Member] | The trust Company Australia Pty Ltd [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 11 55
Lease Liabilities At Nominal Amount [Member] | Later than two years and not later than three years [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 11,207 12,119
Lease Liabilities At Nominal Amount [Member] | Later than two years and not later than three years [member] | SQM Salar S.A. [Member] | Empresa Constructora Contex Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | Later than two years and not later than three years [member] | SQM Salar S.A. [Member] | Transportes Construccin y Servicios Cribach Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | Later than two years and not later than three years [member] | SQM Salar S.A. [Member] | SKM Industrial Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | Later than two years and not later than three years [member] | SQM Salar S.A. [Member] | Ameco Chile SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | Later than two years and not later than three years [member] | SQM Industrial S.A. [Member] | El Trovador SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 5,594 5,594
Lease Liabilities At Nominal Amount [Member] | Later than two years and not later than three years [member] | SQM Industrial S.A. [Member] | Sociedad Comercial Grandleasing Chile Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 420 1,141
Lease Liabilities At Nominal Amount [Member] | Later than two years and not later than three years [member] | Soquimich Comercial S.A. [Member] | SAAM Logistics SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | Later than two years and not later than three years [member] | Soquimich Comercial S.A. [Member] | Muelles de Penco SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | Later than two years and not later than three years [member] | Soquimich Comercial S.A. [Member] | Muelles de Penco SA One [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | Later than two years and not later than three years [member] | Soquimich Comercial S.A. [Member] | Inmobiliaria Chincui SPA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 1,883 1,883
Lease Liabilities At Nominal Amount [Member] | Later than two years and not later than three years [member] | Soquimich Comercial S.A. [Member] | Compaa de Leasing Tattersall SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | Later than two years and not later than three years [member] | SQM North America Corp. [Member] | Paces West LL [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 730 709
Lease Liabilities At Nominal Amount [Member] | Later than two years and not later than three years [member] | SQM North America Corp. [Member] | Hawkins Nunmber One LLC [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 90 224
Lease Liabilities At Nominal Amount [Member] | Later than two years and not later than three years [member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Onni Ensenada SA de CV [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 1,151 1,184
Lease Liabilities At Nominal Amount [Member] | Later than two years and not later than three years [member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Madol Inmobiliaria SA de CV [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 65
Lease Liabilities At Nominal Amount [Member] | Later than two years and not later than three years [member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Madol Inmobiliaria SA de CV One [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 24
Lease Liabilities At Nominal Amount [Member] | Later than two years and not later than three years [member] | SQM Europe N.V. [Member] | Straatsburgdok NV [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 1,339 1,295
Lease Liabilities At Nominal Amount [Member] | Later than two years and not later than three years [member] | SQM Australia PTY [Member] | The trust Company Australia Pty Ltd [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | Later than three years and not later than four years [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 7,165 10,271
Lease Liabilities At Nominal Amount [Member] | Later than three years and not later than four years [member] | SQM Salar S.A. [Member] | Empresa Constructora Contex Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | Later than three years and not later than four years [member] | SQM Salar S.A. [Member] | Transportes Construccin y Servicios Cribach Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | Later than three years and not later than four years [member] | SQM Salar S.A. [Member] | SKM Industrial Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | Later than three years and not later than four years [member] | SQM Salar S.A. [Member] | Ameco Chile SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | Later than three years and not later than four years [member] | SQM Industrial S.A. [Member] | El Trovador SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 5,905 7,373
Lease Liabilities At Nominal Amount [Member] | Later than three years and not later than four years [member] | SQM Industrial S.A. [Member] | Sociedad Comercial Grandleasing Chile Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | Later than three years and not later than four years [member] | Soquimich Comercial S.A. [Member] | SAAM Logistics SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | Later than three years and not later than four years [member] | Soquimich Comercial S.A. [Member] | Muelles de Penco SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | Later than three years and not later than four years [member] | Soquimich Comercial S.A. [Member] | Muelles de Penco SA One [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | Later than three years and not later than four years [member] | Soquimich Comercial S.A. [Member] | Inmobiliaria Chincui SPA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 889 1,464
Lease Liabilities At Nominal Amount [Member] | Later than three years and not later than four years [member] | Soquimich Comercial S.A. [Member] | Compaa de Leasing Tattersall SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | Later than three years and not later than four years [member] | SQM North America Corp. [Member] | Paces West LL [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 258 508
Lease Liabilities At Nominal Amount [Member] | Later than three years and not later than four years [member] | SQM North America Corp. [Member] | Hawkins Nunmber One LLC [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | Later than three years and not later than four years [member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Onni Ensenada SA de CV [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 362
Lease Liabilities At Nominal Amount [Member] | Later than three years and not later than four years [member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Madol Inmobiliaria SA de CV [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | Later than three years and not later than four years [member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Madol Inmobiliaria SA de CV One [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Nominal Amount [Member] | Later than three years and not later than four years [member] | SQM Europe N.V. [Member] | Straatsburgdok NV [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 113 564
Lease Liabilities At Nominal Amount [Member] | Later than three years and not later than four years [member] | SQM Australia PTY [Member] | The trust Company Australia Pty Ltd [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Amortized Cost Member [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 25,546 30,203
Lease Liabilities At Amortized Cost Member [Member] | SQM Salar S.A. [Member] | Empresa Constructora Contex Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 547
Lease Liabilities At Amortized Cost Member [Member] | SQM Salar S.A. [Member] | Transportes Construccin y Servicios Cribach Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Amortized Cost Member [Member] | SQM Salar S.A. [Member] | SKM Industrial Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 330 1,077
Lease Liabilities At Amortized Cost Member [Member] | SQM Salar S.A. [Member] | Ameco Chile SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 134
Lease Liabilities At Amortized Cost Member [Member] | SQM Industrial S.A. [Member] | El Trovador SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 13,462 14,891
Lease Liabilities At Amortized Cost Member [Member] | SQM Industrial S.A. [Member] | Sociedad Comercial Grandleasing Chile Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 1,796 2,457
Lease Liabilities At Amortized Cost Member [Member] | Soquimich Comercial S.A. [Member] | SAAM Logistics SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Amortized Cost Member [Member] | Soquimich Comercial S.A. [Member] | Muelles de Penco SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 259 0
Lease Liabilities At Amortized Cost Member [Member] | Soquimich Comercial S.A. [Member] | Muelles de Penco SA One [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 278 0
Lease Liabilities At Amortized Cost Member [Member] | Soquimich Comercial S.A. [Member] | Inmobiliaria Chincui SPA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 3,621 4,119
Lease Liabilities At Amortized Cost Member [Member] | Soquimich Comercial S.A. [Member] | Compaa de Leasing Tattersall SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 72
Lease Liabilities At Amortized Cost Member [Member] | SQM North America Corp. [Member] | Paces West LL [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 1,298 1,470
Lease Liabilities At Amortized Cost Member [Member] | SQM North America Corp. [Member] | Hawkins Nunmber One LLC [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 338 451
Lease Liabilities At Amortized Cost Member [Member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Onni Ensenada SA de CV [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 1,783 2,109
Lease Liabilities At Amortized Cost Member [Member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Madol Inmobiliaria SA de CV [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 133 198
Lease Liabilities At Amortized Cost Member [Member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Madol Inmobiliaria SA de CV One [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 48 72
Lease Liabilities At Amortized Cost Member [Member] | SQM Europe N.V. [Member] | Straatsburgdok NV [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 2,189 2,551
Lease Liabilities At Amortized Cost Member [Member] | SQM Australia PTY [Member] | The trust Company Australia Pty Ltd [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 11 55
Lease Liabilities At Amortized Cost Member [Member] | Later than one year and not later than two years [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 8,362 9,321
Lease Liabilities At Amortized Cost Member [Member] | Later than one year and not later than two years [member] | SQM Salar S.A. [Member] | Empresa Constructora Contex Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 547
Lease Liabilities At Amortized Cost Member [Member] | Later than one year and not later than two years [member] | SQM Salar S.A. [Member] | Transportes Construccin y Servicios Cribach Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Amortized Cost Member [Member] | Later than one year and not later than two years [member] | SQM Salar S.A. [Member] | SKM Industrial Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 330 1,077
Lease Liabilities At Amortized Cost Member [Member] | Later than one year and not later than two years [member] | SQM Salar S.A. [Member] | Ameco Chile SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 134
Lease Liabilities At Amortized Cost Member [Member] | Later than one year and not later than two years [member] | SQM Industrial S.A. [Member] | El Trovador SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 2,993 2,903
Lease Liabilities At Amortized Cost Member [Member] | Later than one year and not later than two years [member] | SQM Industrial S.A. [Member] | Sociedad Comercial Grandleasing Chile Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 1,379 1,342
Lease Liabilities At Amortized Cost Member [Member] | Later than one year and not later than two years [member] | Soquimich Comercial S.A. [Member] | SAAM Logistics SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Amortized Cost Member [Member] | Later than one year and not later than two years [member] | Soquimich Comercial S.A. [Member] | Muelles de Penco SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 163 0
Lease Liabilities At Amortized Cost Member [Member] | Later than one year and not later than two years [member] | Soquimich Comercial S.A. [Member] | Muelles de Penco SA One [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 175 0
Lease Liabilities At Amortized Cost Member [Member] | Later than one year and not later than two years [member] | Soquimich Comercial S.A. [Member] | Inmobiliaria Chincui SPA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 1,047 1,013
Lease Liabilities At Amortized Cost Member [Member] | Later than one year and not later than two years [member] | Soquimich Comercial S.A. [Member] | Compaa de Leasing Tattersall SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 72
Lease Liabilities At Amortized Cost Member [Member] | Later than one year and not later than two years [member] | SQM North America Corp. [Member] | Paces West LL [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 377 351
Lease Liabilities At Amortized Cost Member [Member] | Later than one year and not later than two years [member] | SQM North America Corp. [Member] | Hawkins Nunmber One LLC [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 249 234
Lease Liabilities At Amortized Cost Member [Member] | Later than one year and not later than two years [member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Onni Ensenada SA de CV [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 689 665
Lease Liabilities At Amortized Cost Member [Member] | Later than one year and not later than two years [member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Madol Inmobiliaria SA de CV [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 133 135
Lease Liabilities At Amortized Cost Member [Member] | Later than one year and not later than two years [member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Madol Inmobiliaria SA de CV One [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 48 49
Lease Liabilities At Amortized Cost Member [Member] | Later than one year and not later than two years [member] | SQM Europe N.V. [Member] | Straatsburgdok NV [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 768 744
Lease Liabilities At Amortized Cost Member [Member] | Later than one year and not later than two years [member] | SQM Australia PTY [Member] | The trust Company Australia Pty Ltd [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 11 55
Lease Liabilities At Amortized Cost Member [Member] | Later than two years and not later than three years [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 10,329 10,733
Lease Liabilities At Amortized Cost Member [Member] | Later than two years and not later than three years [member] | SQM Salar S.A. [Member] | Empresa Constructora Contex Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Amortized Cost Member [Member] | Later than two years and not later than three years [member] | SQM Salar S.A. [Member] | Transportes Construccin y Servicios Cribach Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Amortized Cost Member [Member] | Later than two years and not later than three years [member] | SQM Salar S.A. [Member] | SKM Industrial Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Amortized Cost Member [Member] | Later than two years and not later than three years [member] | SQM Salar S.A. [Member] | Ameco Chile SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Amortized Cost Member [Member] | Later than two years and not later than three years [member] | SQM Industrial S.A. [Member] | El Trovador SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 4,847 4,701
Lease Liabilities At Amortized Cost Member [Member] | Later than two years and not later than three years [member] | SQM Industrial S.A. [Member] | Sociedad Comercial Grandleasing Chile Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 417 1,115
Lease Liabilities At Amortized Cost Member [Member] | Later than two years and not later than three years [member] | Soquimich Comercial S.A. [Member] | SAAM Logistics SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Amortized Cost Member [Member] | Later than two years and not later than three years [member] | Soquimich Comercial S.A. [Member] | Muelles de Penco SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 96 0
Lease Liabilities At Amortized Cost Member [Member] | Later than two years and not later than three years [member] | Soquimich Comercial S.A. [Member] | Muelles de Penco SA One [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 103 0
Lease Liabilities At Amortized Cost Member [Member] | Later than two years and not later than three years [member] | Soquimich Comercial S.A. [Member] | Inmobiliaria Chincui SPA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 1,707 1,651
Lease Liabilities At Amortized Cost Member [Member] | Later than two years and not later than three years [member] | Soquimich Comercial S.A. [Member] | Compaa de Leasing Tattersall SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Amortized Cost Member [Member] | Later than two years and not later than three years [member] | SQM North America Corp. [Member] | Paces West LL [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 668 627
Lease Liabilities At Amortized Cost Member [Member] | Later than two years and not later than three years [member] | SQM North America Corp. [Member] | Hawkins Nunmber One LLC [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 89 217
Lease Liabilities At Amortized Cost Member [Member] | Later than two years and not later than three years [member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Onni Ensenada SA de CV [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 1,094 1,088
Lease Liabilities At Amortized Cost Member [Member] | Later than two years and not later than three years [member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Madol Inmobiliaria SA de CV [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 63
Lease Liabilities At Amortized Cost Member [Member] | Later than two years and not later than three years [member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Madol Inmobiliaria SA de CV One [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 23
Lease Liabilities At Amortized Cost Member [Member] | Later than two years and not later than three years [member] | SQM Europe N.V. [Member] | Straatsburgdok NV [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 1,308 1,248
Lease Liabilities At Amortized Cost Member [Member] | Later than two years and not later than three years [member] | SQM Australia PTY [Member] | The trust Company Australia Pty Ltd [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Amortized Cost Member [Member] | Later than three years and not later than four years [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 6,855 10,149
Lease Liabilities At Amortized Cost Member [Member] | Later than three years and not later than four years [member] | SQM Salar S.A. [Member] | Empresa Constructora Contex Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Amortized Cost Member [Member] | Later than three years and not later than four years [member] | SQM Salar S.A. [Member] | Transportes Construccin y Servicios Cribach Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Amortized Cost Member [Member] | Later than three years and not later than four years [member] | SQM Salar S.A. [Member] | SKM Industrial Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Amortized Cost Member [Member] | Later than three years and not later than four years [member] | SQM Salar S.A. [Member] | Ameco Chile SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Amortized Cost Member [Member] | Later than three years and not later than four years [member] | SQM Industrial S.A. [Member] | El Trovador SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 5,622 7,287
Lease Liabilities At Amortized Cost Member [Member] | Later than three years and not later than four years [member] | SQM Industrial S.A. [Member] | Sociedad Comercial Grandleasing Chile Ltda [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Amortized Cost Member [Member] | Later than three years and not later than four years [member] | Soquimich Comercial S.A. [Member] | SAAM Logistics SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Amortized Cost Member [Member] | Later than three years and not later than four years [member] | Soquimich Comercial S.A. [Member] | Muelles de Penco SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Amortized Cost Member [Member] | Later than three years and not later than four years [member] | Soquimich Comercial S.A. [Member] | Muelles de Penco SA One [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Amortized Cost Member [Member] | Later than three years and not later than four years [member] | Soquimich Comercial S.A. [Member] | Inmobiliaria Chincui SPA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 867 1,455
Lease Liabilities At Amortized Cost Member [Member] | Later than three years and not later than four years [member] | Soquimich Comercial S.A. [Member] | Compaa de Leasing Tattersall SA [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Amortized Cost Member [Member] | Later than three years and not later than four years [member] | SQM North America Corp. [Member] | Paces West LL [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 253 492
Lease Liabilities At Amortized Cost Member [Member] | Later than three years and not later than four years [member] | SQM North America Corp. [Member] | Hawkins Nunmber One LLC [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Amortized Cost Member [Member] | Later than three years and not later than four years [member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Onni Ensenada SA de CV [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 356
Lease Liabilities At Amortized Cost Member [Member] | Later than three years and not later than four years [member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Madol Inmobiliaria SA de CV [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Amortized Cost Member [Member] | Later than three years and not later than four years [member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Madol Inmobiliaria SA de CV One [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 0 0
Lease Liabilities At Amortized Cost Member [Member] | Later than three years and not later than four years [member] | SQM Europe N.V. [Member] | Straatsburgdok NV [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities 113 559
Lease Liabilities At Amortized Cost Member [Member] | Later than three years and not later than four years [member] | SQM Australia PTY [Member] | The trust Company Australia Pty Ltd [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Non-current lease liabilities $ 0 $ 0