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Fair Value Quantitative and Qualitative Disclosures - Summary of Comparison Between the Fair Value and the Carrying Amount of Financial Instruments (Detail) - ARS ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
FINANCIAL ASSETS |  |  |
Cash and deposits in banks | $ 129,967,486 | $ 137,066,430 | $ 156,581,272
Repo transactions | 39,421,705 | 1,481,096 |
Other financial assets | 18,280,848 | 7,889,031 |
Loans and other financing | 257,421,195 | 300,731,589 |
Other debt securities | 31,113,789 | 24,004,210 |
Financial assets delivered as guarantee | 13,596,610 | 14,530,739 |
Financial assets | 489,801,633 | 485,703,095 |
Financial liabilities |  |  |
Deposits | 488,741,363 | 357,866,442 |
Repo transactions | 618,572 | 1,364,825 |
Other financial liabilities | 49,215,887 | 30,181,836 |
Financing received from the BCRA and other financial entities | 919,103 | 3,057,451 |
Issued corporate bonds | 4,926,901 | 7,521,820 |
Subordinated corporate bonds | 34,300,292 | 33,098,040 |
Financial liabilities | 578,722,118 | 433,090,414 |
Level 1 [member] |  |  |
FINANCIAL ASSETS |  |  |
Cash and deposits in banks | 129,967,486 | 137,066,430 |
Repo transactions | 39,421,705 | 1,481,096 |
Other financial assets | 18,280,848 | 7,889,031 |
Loans and other financing |  | 424,388 |
Other debt securities | 10,559,766 | 2,127,361 |
Financial assets delivered as guarantee | 13,596,610 | 13,064,394 |
Financial assets | 211,826,415 | 162,052,700 |
Financial liabilities |  |  |
Deposits | 243,062,751 | 200,293,229 |
Repo transactions | 618,572 | 1,364,825 |
Other financial liabilities | 47,879,138 | 28,680,171 |
Financing received from the BCRA and other financial entities | 323,872 | 2,501,414 |
Financial liabilities | 291,884,333 | 232,839,639 |
Level 2 [member] |  |  |
FINANCIAL ASSETS |  |  |
Other debt securities | 22,210,308 | 22,652,005 |
Financial assets | 22,210,308 | 22,652,005 |
Financial liabilities |  |  |
Other financial liabilities | 1,331,299 | 1,489,374 |
Financing received from the BCRA and other financial entities | 585,643 | 481,284 |
Issued corporate bonds | 4,120,798 | 1,878,785 |
Subordinated corporate bonds | 29,103,736 | 24,967,325 |
Financial liabilities | 35,141,476 | 28,816,768 |
Level 3 [member] |  |  |
FINANCIAL ASSETS |  |  |
Loans and other financing | 239,959,333 | 264,176,063 |
Other debt securities | 148,327 | 1,660,974 |
Financial assets | 240,107,660 | 265,837,037 |
Financial liabilities |  |  |
Deposits | 245,400,493 | 157,881,650 |
Issued corporate bonds |  | 3,619,745 |
Financial liabilities | 245,400,493 | 161,501,395 |
At fair value [member] |  |  |
FINANCIAL ASSETS |  |  |
Cash and deposits in banks | 129,967,486 | 137,066,430 |
Repo transactions | 39,421,705 | 1,481,096 |
Other financial assets | 18,280,848 | 7,889,031 |
Loans and other financing | 239,959,333 | 264,600,451 |
Other debt securities | 32,918,401 | 26,440,340 |
Financial assets delivered as guarantee | 13,596,610 | 13,064,394 |
Financial assets | 474,144,383 | 450,541,742 |
Financial liabilities |  |  |
Deposits | 488,463,244 | 358,174,879 |
Repo transactions | 618,572 | 1,364,825 |
Other financial liabilities | 49,210,437 | 30,169,545 |
Financing received from the BCRA and other financial entities | 909,515 | 2,982,698 |
Issued corporate bonds | 4,120,798 | 5,498,530 |
Subordinated corporate bonds | 29,103,736 | 24,967,325 |
Financial liabilities | $ 572,426,302 | $ 423,157,802 |

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