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Securities sold under repurchase agreements (Tables) | 12 Months Ended
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Dec. 31, 2019
Text Block [Abstract] |
Summary of Securities Sold under Repurchase Agreements |
|  | 2019 |  |  | 2018 |
National Treasury Notes (NTNs) |  |  | 8,533,113 |  |  |  | 1,153,547 |
National Treasury Bills (LTNs) |  |  | 5,653,994 |  |  |  | 5,142,881 |
Financial Treasury Bills (LFTs) |  |  | 1,451,300 |  |  |  | 344,266 |
Total |  |  | 15,638,407 |  |  |  | 6,640,694 |

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