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Capital Stock (Tables) | 12 Months Ended
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Dec. 31, 2020
Statement [LineItems] |
Summary of Bank's Subscribed and Paid-in Capital | The Bank’s subscribed and paid-in capital as of December 31, 2020, amounted to 639,413. Since January 1, 2019, the Bank’s capital stock has changed as follows:
SHARES |  | CAPITAL STOCK |
Class |  | Number of shares |  |  | Votes per share |  | Issued and outstanding |  |  | In treasury |  |  | Paid-in |
Registered Class A shares of common stock |  |  | 11,235,670 |  |  | 5 |  |  | 11,236 |  |  |  |  |  |  |  | 11,236 |
Registered Class B shares of common stock |  |  | 658,427,351 |  |  | 1 |  |  | 629,479 |  |  |  | 28,948 | (1) |  |  | 658,427 |
Total as of January1, 2019 |  |  | 669,663,021 |  |  |  |  |  | 640,715 |  |  |  | 28,948 |  |  |  | 669,663 |
Own shares acquired (1) |  |  |  |  |  |  |  |  | (1,317 | ) |  |  | 1,317 |  |  |  |  |
Capital stock decrease (2) |  |  | (30,265,275 | ) |  |  |  |  |  |  |  |  | (30,265 | ) |  |  | (30,265 | )
Capital stock increase (3) |  |  | 15,662 |  |  |  |  |  | 15 |  |  |  |  |  |  |  | 15 |
Total 2019 |  |  | 639,413,408 |  |  |  |  |  | 639,413 |  |  |  |  |  |  |  | 639,413 |
As of December 31, 2020 and 2019: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Registered Class A shares of common stock |  |  | 11,235,670 |  |  | 5 |  |  | 11,236 |  |  |  |  |  |  |  | 11,236 |
Registered Class B shares of common stock |  |  | 628,177,738 |  |  | 1 |  |  | 628,177 |  |  |  |  |  |  |  | 628,177 |
Total 2020 and 2019 |  |  | 639,413,408 |  |  |  |  |  | 639,413 |  |  |  |  |  |  |  | 639,413 |
(1) | Related to the repurchase of the Bank’s own shares under the programs established by the Bank’s Board of Directors on August 8, 2018, October 17, 2018 and December 20, 2018 with the purpose of reducing share price fluctuations, minimizing possible temporary imbalances between market supply and demand.

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