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Significant Events (Details Textual) - CLP ($) $ / shares in Units, $ in Millions |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Aug. 12, 2019 | Nov. 27, 2019 | Sep. 26, 2019 | Aug. 27, 2019 | Jul. 30, 2019 | Apr. 23, 2019 | Mar. 26, 2019 | Dec. 31, 2019 | Dec. 31, 2018
Significant Events (Textual) |  |  |  |  |  |  |  |  |
Net profit |  |  |  |  |  |  |  |  | 60.00%
Shareholders dividend per share |  |  |  |  |  | $ 1.88457837 |  |  |
Profits used to increase the banks reserves |  |  |  |  |  | 40.00% |  |  |
Percentage of capital stock |  |  |  |  |  |  | 49.00% |  |
Capital stock |  |  |  |  |  |  | $ 59,063,470,000 |  |
Consideration acquisition shares issued, percentage | 51.00% |  |  | 51.00% | 51.00% |  |  |  |
Percentage of subscribed subsidiary |  |  | 50.10% |  |  |  |  |  |
New subsidiaries, description |  | The Bank acquired 51% of Santander Consumer S.A., an automobile financing non-banking company, which became a subsidiary of the Bank and a supporting banking business company from SK Berge (49%) and Banco Santander S.A. (2%) for a total amount MCh$62,136. The purchase generated a negative equity effect of MCh$37,041, since it was considered a transaction between entities under common control, the Bank used “predecessor accounting method”. |  |  |  |  |  |  |
Investment percentage |  |  |  |  |  |  |  | 12.90% |
Description of social unrest |  |  |  |  |  |  |  | As of December 31, 2019, the Bank recorded an impairment for an amount of MCh$2,726 (see Note 33), and expenses for MCh$1,823 as other operational expenses (see Note 34). Most of this damage was insured. |
AUD [Member] |  |  |  |  |  |  |  |  |
Significant Events (Textual) |  |  |  |  |  |  |  |  |
Bank has issued senior bonds |  |  |  |  |  |  |  | $ 185,000,000 |
EUR [Member] |  |  |  |  |  |  |  |  |
Significant Events (Textual) |  |  |  |  |  |  |  |  |
Bank has issued senior bonds |  |  |  |  |  |  |  | 65,000,000 |
CHF [Member] |  |  |  |  |  |  |  |  |
Significant Events (Textual) |  |  |  |  |  |  |  |  |
Bank has issued senior bonds |  |  |  |  |  |  |  | $ 250,000,000 |

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