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Right-of-use assets and Lease liabilities (Details 3) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities $ 5,528 $ 7,694
Lease Liabilities At Nominal Amount [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 6,402 8,902
Lease Liabilities At Nominal Amount [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 2,131 2,335
Lease Liabilities At Nominal Amount [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 4,271 6,567
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]    
Current lease liabilities 536 2,216
Lease Liabilities At Nominal Amount [Member] | SQM Salar S.A. [Member] | Empresa Constructora Contex Ltda [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 536 554
Lease Liabilities At Nominal Amount [Member] | SQM Salar S.A. [Member] | Empresa Constructora Contex Ltda [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 0 1,662
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]    
Current lease liabilities 0 198
Lease Liabilities At Nominal Amount [Member] | SQM Salar S.A. [Member] | Transportes Construccin y Servicios Cribach Ltda [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 0 74
Lease Liabilities At Nominal Amount [Member] | SQM Salar S.A. [Member] | Transportes Construccin y Servicios Cribach Ltda [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 0 124
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]    
Current lease liabilities 809 809
Lease Liabilities At Nominal Amount [Member] | SQM Salar S.A. [Member] | SKM Industrial Ltda [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 202 202
Lease Liabilities At Nominal Amount [Member] | SQM Salar S.A. [Member] | SKM Industrial Ltda [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 607 607
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]    
Current lease liabilities 135 539
Lease Liabilities At Nominal Amount [Member] | SQM Salar S.A. [Member] | Ameco Chile SA [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 135 135
Lease Liabilities At Nominal Amount [Member] | SQM Salar S.A. [Member] | Ameco Chile SA [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 0 404
Lease Liabilities At Nominal Amount [Member] | SQM Industrial S.A. [Member] | ElTrovadorSa [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 1,865 1,865
Lease Liabilities At Nominal Amount [Member] | SQM Industrial S.A. [Member] | ElTrovadorSa [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 466 466
Lease Liabilities At Nominal Amount [Member] | SQM Industrial S.A. [Member] | ElTrovadorSa [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 1,399 1,399
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]    
Current lease liabilities 720 720
Lease Liabilities At Nominal Amount [Member] | SQM Industrial S.A. [Member] | Sociedad Comercial Grandleasing Chile Ltda [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 180 180
Lease Liabilities At Nominal Amount [Member] | SQM Industrial S.A. [Member] | Sociedad Comercial Grandleasing Chile Ltda [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 540 540
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]    
Current lease liabilities 0 248
Lease Liabilities At Nominal Amount [Member] | Soquimich Comercial S.A. [Member] | SAAM Logistics SA [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 0 106
Lease Liabilities At Nominal Amount [Member] | Soquimich Comercial S.A. [Member] | SAAM Logistics SA [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 0 142
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]    
Current lease liabilities 165 105
Lease Liabilities At Nominal Amount [Member] | Soquimich Comercial S.A. [Member] | Muelles de Penco SA [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 41 45
Lease Liabilities At Nominal Amount [Member] | Soquimich Comercial S.A. [Member] | Muelles de Penco SA [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 124 60
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]    
Current lease liabilities 177 112
Lease Liabilities At Nominal Amount [Member] | Soquimich Comercial S.A. [Member] | Muelles de Penco SA One [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 44 48
Lease Liabilities At Nominal Amount [Member] | Soquimich Comercial S.A. [Member] | Muelles de Penco SA One [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 133 64
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]    
Current lease liabilities 628 628
Lease Liabilities At Nominal Amount [Member] | Soquimich Comercial S.A. [Member] | Inmobiliaria Chincui SPA [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 157 157
Lease Liabilities At Nominal Amount [Member] | Soquimich Comercial S.A. [Member] | Inmobiliaria Chincui SPA [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 471 471
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]    
Current lease liabilities 73 219
Lease Liabilities At Nominal Amount [Member] | Soquimich Comercial S.A. [Member] | Compaa de Leasing Tattersall SA [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 55 55
Lease Liabilities At Nominal Amount [Member] | Soquimich Comercial S.A. [Member] | Compaa de Leasing Tattersall SA [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 18 164
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]    
Current lease liabilities 216 205
Lease Liabilities At Nominal Amount [Member] | SQM North America Corp. [Member] | Paces West LL [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 53 49
Lease Liabilities At Nominal Amount [Member] | SQM North America Corp. [Member] | Paces West LL [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 163 156
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]    
Current lease liabilities 127 124
Lease Liabilities At Nominal Amount [Member] | SQM North America Corp. [Member] | Hawkins Nunmber One LLC [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 31 31
Lease Liabilities At Nominal Amount [Member] | SQM North America Corp. [Member] | Hawkins Nunmber One LLC [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 96 93
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]    
Current lease liabilities 395 395
Lease Liabilities At Nominal Amount [Member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Onni Ensenada SA de CV [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 99 99
Lease Liabilities At Nominal Amount [Member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Onni Ensenada SA de CV [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 296 296
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]    
Current lease liabilities 79 79
Lease Liabilities At Nominal Amount [Member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Madol Inmobiliaria SA de CV [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 20 20
Lease Liabilities At Nominal Amount [Member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Madol Inmobiliaria SA de CV [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 59 59
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]    
Current lease liabilities 28 28
Lease Liabilities At Nominal Amount [Member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Madol Inmobiliaria SA de CV One [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 7 7
Lease Liabilities At Nominal Amount [Member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Madol Inmobiliaria SA de CV One [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 21 21
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]    
Current lease liabilities 393 364
Lease Liabilities At Nominal Amount [Member] | SQM Europe N.V. [Member] | Straatsburgdok NV [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 91 91
Lease Liabilities At Nominal Amount [Member] | SQM Europe N.V. [Member] | Straatsburgdok NV [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 302 273
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]    
Current lease liabilities 56 48
Lease Liabilities At Nominal Amount [Member] | SQM Australia PTY [Member] | The trust Company Australia Pty Ltd [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 14 16
Lease Liabilities At Nominal Amount [Member] | SQM Australia PTY [Member] | The trust Company Australia Pty Ltd [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 42 32
Lease Liabilities At Amortized Cost Member [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 5,528 7,694
Lease Liabilities At Amortized Cost Member [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 1,925 1,994
Lease Liabilities At Amortized Cost Member [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 3,603 5,700
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]    
Current lease liabilities 536 2,084
Lease Liabilities At Amortized Cost Member [Member] | SQM Salar S.A. [Member] | Empresa Constructora Contex Ltda [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 536 506
Lease Liabilities At Amortized Cost Member [Member] | SQM Salar S.A. [Member] | Empresa Constructora Contex Ltda [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 0 1,578
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]    
Current lease liabilities 0 192
Lease Liabilities At Amortized Cost Member [Member] | SQM Salar S.A. [Member] | Transportes Construccin y Servicios Cribach Ltda [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 0 71
Lease Liabilities At Amortized Cost Member [Member] | SQM Salar S.A. [Member] | Transportes Construccin y Servicios Cribach Ltda [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 0 121
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]    
Current lease liabilities 747 685
Lease Liabilities At Amortized Cost Member [Member] | SQM Salar S.A. [Member] | SKM Industrial Ltda [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 181 166
Lease Liabilities At Amortized Cost Member [Member] | SQM Salar S.A. [Member] | SKM Industrial Ltda [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 566 519
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]    
Current lease liabilities 134 523
Lease Liabilities At Amortized Cost Member [Member] | SQM Salar S.A. [Member] | Ameco Chile SA [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 134 129
Lease Liabilities At Amortized Cost Member [Member] | SQM Salar S.A. [Member] | Ameco Chile SA [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 0 394
Lease Liabilities At Amortized Cost Member [Member] | SQM Industrial S.A. [Member] | ElTrovadorSa [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 1,429 1,387
Lease Liabilities At Amortized Cost Member [Member] | SQM Industrial S.A. [Member] | ElTrovadorSa [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 353 343
Lease Liabilities At Amortized Cost Member [Member] | SQM Industrial S.A. [Member] | ElTrovadorSa [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 1,076 1,044
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]    
Current lease liabilities 662 644
Lease Liabilities At Amortized Cost Member [Member] | SQM Industrial S.A. [Member] | Sociedad Comercial Grandleasing Chile Ltda [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 164 159
Lease Liabilities At Amortized Cost Member [Member] | SQM Industrial S.A. [Member] | Sociedad Comercial Grandleasing Chile Ltda [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 498 485
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]    
Current lease liabilities 0 243
Lease Liabilities At Amortized Cost Member [Member] | Soquimich Comercial S.A. [Member] | SAAM Logistics SA [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 0 103
Lease Liabilities At Amortized Cost Member [Member] | Soquimich Comercial S.A. [Member] | SAAM Logistics SA [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 0 140
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]    
Current lease liabilities 161 103
Lease Liabilities At Amortized Cost Member [Member] | Soquimich Comercial S.A. [Member] | Muelles de Penco SA [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 54 44
Lease Liabilities At Amortized Cost Member [Member] | Soquimich Comercial S.A. [Member] | Muelles de Penco SA [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 107 59
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]    
Current lease liabilities 172 111
Lease Liabilities At Amortized Cost Member [Member] | Soquimich Comercial S.A. [Member] | Muelles de Penco SA One [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 57 47
Lease Liabilities At Amortized Cost Member [Member] | Soquimich Comercial S.A. [Member] | Muelles de Penco SA One [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 115 64
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]    
Current lease liabilities 499 482
Lease Liabilities At Amortized Cost Member [Member] | Soquimich Comercial S.A. [Member] | Inmobiliaria Chincui SPA [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 123 119
Lease Liabilities At Amortized Cost Member [Member] | Soquimich Comercial S.A. [Member] | Inmobiliaria Chincui SPA [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 376 363
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]    
Current lease liabilities 72 208
Lease Liabilities At Amortized Cost Member [Member] | Soquimich Comercial S.A. [Member] | Compaa de Leasing Tattersall SA [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 54 51
Lease Liabilities At Amortized Cost Member [Member] | Soquimich Comercial S.A. [Member] | Compaa de Leasing Tattersall SA [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 18 157
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]    
Current lease liabilities 169 150
Lease Liabilities At Amortized Cost Member [Member] | SQM North America Corp. [Member] | Paces West LL [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 41 34
Lease Liabilities At Amortized Cost Member [Member] | SQM North America Corp. [Member] | Paces West LL [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 128 116
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]    
Current lease liabilities 113 107
Lease Liabilities At Amortized Cost Member [Member] | SQM North America Corp. [Member] | Hawkins Nunmber One LLC [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 28 26
Lease Liabilities At Amortized Cost Member [Member] | SQM North America Corp. [Member] | Hawkins Nunmber One LLC [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 85 81
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]    
Current lease liabilities 327 316
Lease Liabilities At Amortized Cost Member [Member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Onni Ensenada SA de CV [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 81 78
Lease Liabilities At Amortized Cost Member [Member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Onni Ensenada SA de CV [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 246 238
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]    
Current lease liabilities 65 61
Lease Liabilities At Amortized Cost Member [Member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Madol Inmobiliaria SA de CV [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 16 15
Lease Liabilities At Amortized Cost Member [Member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Madol Inmobiliaria SA de CV [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 49 46
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]    
Current lease liabilities 24 21
Lease Liabilities At Amortized Cost Member [Member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Madol Inmobiliaria SA de CV One [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 6 5
Lease Liabilities At Amortized Cost Member [Member] | SQM Comercial De Mexico S.A. de C.V. [Member] | Madol Inmobiliaria SA de CV One [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 18 16
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]    
Current lease liabilities 362 329
Lease Liabilities At Amortized Cost Member [Member] | SQM Europe N.V. [Member] | Straatsburgdok NV [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 83 82
Lease Liabilities At Amortized Cost Member [Member] | SQM Europe N.V. [Member] | Straatsburgdok NV [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 279 247
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]    
Current lease liabilities 56 48
Lease Liabilities At Amortized Cost Member [Member] | SQM Australia PTY [Member] | The trust Company Australia Pty Ltd [Member] | Later than three months [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities 14 16
Lease Liabilities At Amortized Cost Member [Member] | SQM Australia PTY [Member] | The trust Company Australia Pty Ltd [Member] | Later than three months and not later than one year [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Current lease liabilities $ 42 $ 32