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Identification and Activities of the Company and Subsidiaries (Details 1) - shares | Dec. 31, 2020 | Dec. 31, 2019
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Inversiones TLC SPA [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of Shares Outstanding, Ownership Percentage | 23.77% | 23.77%
The Bank of New York Mellon, ADRs [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of Shares Outstanding, Ownership Percentage | 19.30% | 14.56%
Sociedad de Inversiones Pampa Calichera S.A. [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of Shares Outstanding, Ownership Percentage | 17.41% | 18.50%
Potasios de Chile S.A. [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of Shares Outstanding, Ownership Percentage | 6.91% | 6.91%
Inversiones Global Mining Chile Limitada [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of Shares Outstanding, Ownership Percentage | 3.34% | 3.34%
Banco de Chile Non Resident Third Party Accounts [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of Shares Outstanding, Ownership Percentage | 2.33% | 2.60%
Banco Itau via Foreign Investor Accounts [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of Shares Outstanding, Ownership Percentage |  | 2.80%
Banco Santander via Foreign Investor [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of Shares Outstanding, Ownership Percentage | 2.77% | 2.51%
Banco de Chile via State Street [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of Shares Outstanding, Ownership Percentage | 2.65% |
Euroamerica C de B SA [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of Shares Outstanding, Ownership Percentage | 3.34% | 1.85%
Banchile C de B S A [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of Shares Outstanding, Ownership Percentage |  | 1.82%
Inversiones la Esperanza de Chile Limitada [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of Shares Outstanding, Ownership Percentage | 1.59% | 1.59%
Banchile Corredora de Bolsa S. A. [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of Shares Outstanding, Ownership Percentage | 1.10% |
Banco de Chile on behalf of Citibank NA New York customers [member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of Shares Outstanding, Ownership Percentage | 0.73% |
Santiago stock exchanges [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of Shares Outstanding, Ownership Percentage |  | 1.18%
Series A Stock [Member] | Inversiones TLC SPA [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding | 62,556,568 | 62,556,568
Number of Shares Outstanding, Ownership Percentage | 43.80% | 43.80%
Series A Stock [Member] | The Bank of New York Mellon, ADRs [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding | 0 | 0
Number of Shares Outstanding, Ownership Percentage | 0.00% | 0.00%
Series A Stock [Member] | Sociedad de Inversiones Pampa Calichera S.A. [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding | 44,894,152 | 44,894,152
Number of Shares Outstanding, Ownership Percentage | 31.43% | 31.43%
Series A Stock [Member] | Potasios de Chile S.A. [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding | 18,179,147 | 18,179,147
Number of Shares Outstanding, Ownership Percentage | 12.73% | 12.73%
Series A Stock [Member] | Inversiones Global Mining Chile Limitada [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding | 8,798,539 | 8,798,539
Number of Shares Outstanding, Ownership Percentage | 6.16% | 6.16%
Series A Stock [Member] | Banco de Chile Non Resident Third Party Accounts [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding | 0 | 109
Number of Shares Outstanding, Ownership Percentage | 0.00% | 0.00%
Series A Stock [Member] | Banco Itau via Foreign Investor Accounts [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding |  | 0
Number of Shares Outstanding, Ownership Percentage |  | 0.00%
Series A Stock [Member] | Banco Santander via Foreign Investor [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding | 0 | 0
Number of Shares Outstanding, Ownership Percentage | 0.00% | 0.00%
Series A Stock [Member] | Banco de Chile via State Street [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding | 0 |
Number of Shares Outstanding, Ownership Percentage | 0.00% |
Series A Stock [Member] | Euroamerica C de B SA [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding | 1,418 | 3,056
Number of Shares Outstanding, Ownership Percentage | 0.00% | 0.00%
Series A Stock [Member] | Banchile C de B S A [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding |  | 491,729
Number of Shares Outstanding, Ownership Percentage |  | 0.34%
Series A Stock [Member] | Inversiones la Esperanza de Chile Limitada [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding | 4,147,263 | 4,147,263
Number of Shares Outstanding, Ownership Percentage | 2.90% | 2.90%
Series A Stock [Member] | Banchile Corredora de Bolsa S. A. [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding | 459,202 |
Number of Shares Outstanding, Ownership Percentage | 0.32% |
Series A Stock [Member] | Banco de Chile on behalf of Citibank NA New York customers [member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding | 177,463 |
Number of Shares Outstanding, Ownership Percentage | 0.12% |
Series A Stock [Member] | Santiago stock exchanges [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding |  | 30,590
Number of Shares Outstanding, Ownership Percentage |  | 0.02%
Series B Stock [Member] | Inversiones TLC SPA [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding | 0 | 0
Number of Shares Outstanding, Ownership Percentage | 0.00% | 0.00%
Series B Stock [Member] | The Bank of New York Mellon, ADRs [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding | 50,792,452 | 38,311,788
Number of Shares Outstanding, Ownership Percentage | 42.19% | 31.83%
Series B Stock [Member] | Sociedad de Inversiones Pampa Calichera S.A. [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding | 922,971 | 3,793,154
Number of Shares Outstanding, Ownership Percentage | 0.77% | 3.15%
Series B Stock [Member] | Potasios de Chile S.A. [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding | 0 | 0
Number of Shares Outstanding, Ownership Percentage | 0.00% | 0.00%
Series B Stock [Member] | Inversiones Global Mining Chile Limitada [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding | 0 | 0
Number of Shares Outstanding, Ownership Percentage | 0.00% | 0.00%
Series B Stock [Member] | Banco de Chile Non Resident Third Party Accounts [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding | 6,129,339 | 6,842,746
Number of Shares Outstanding, Ownership Percentage | 5.09% | 5.68%
Series B Stock [Member] | Banco Itau via Foreign Investor Accounts [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding |  | 7,373,216
Number of Shares Outstanding, Ownership Percentage |  | 6.13%
Series B Stock [Member] | Banco Santander via Foreign Investor [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding | 7,294,827 | 6,618,416
Number of Shares Outstanding, Ownership Percentage | 6.06% | 5.50%
Series B Stock [Member] | Banco de Chile via State Street [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding | 6,971,782 |
Number of Shares Outstanding, Ownership Percentage | 5.79% |
Series B Stock [Member] | Euroamerica C de B SA [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding | 8,788,517 | 4,863,467
Number of Shares Outstanding, Ownership Percentage | 7.30% | 4.04%
Series B Stock [Member] | Banchile C de B S A [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding |  | 4,285,696
Number of Shares Outstanding, Ownership Percentage |  | 3.56%
Series B Stock [Member] | Inversiones la Esperanza de Chile Limitada [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding | 46,500 | 46,500
Number of Shares Outstanding, Ownership Percentage | 0.04% | 0.04%
Series B Stock [Member] | Banchile Corredora de Bolsa S. A. [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding | 2,426,758 |
Number of Shares Outstanding, Ownership Percentage | 2.02% |
Series B Stock [Member] | Banco de Chile on behalf of Citibank NA New York customers [member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding | 1,732,249 |
Number of Shares Outstanding, Ownership Percentage | 1.44% |
Series B Stock [Member] | Santiago stock exchanges [Member] |  |
Identification and Activities of the Company and Subsidiaries [Line Items] |  |
Number of shares outstanding |  | 3,077,930
Number of Shares Outstanding, Ownership Percentage |  | 2.56%

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