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Capital Management, Corporate Governance Transparency Policy and Risk Management - Summary of Risk Concentration by Industry for the Components of the Statement of Financial Position (Detail) - ARS ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Disclosure of detailed information about financial instruments [line items] |  |
Loans and other financing | $ 267,349,317 | $ 307,633,542
Non-financial public sector | 3,614,805 | 8,781,948
Other financial entities | 1,839,258 | 5,418,127
Non-financial private sector | 261,895,254 | 293,433,467
Individuals [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 122,025,586 | 129,538,514
Manufacturing Industry [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 26,992,387 | 54,794,277
Agricultural and cattle industry [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 25,317,540 | 25,319,947
Services [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 35,500,369 | 28,869,032
Commercial activities [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 23,771,979 | 20,559,616
Exploration of mines and quarries [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 16,106,376 | 20,376,222
Financial intermediation [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 4,808,861 | 4,872,536
Construction activities [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 4,905,658 | 4,240,322
Electricity supply and gas [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 1,279,033 | 3,546,531
Public administration [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 1,126,396 | 1,273,355
Water supply and public sanitation [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 61,069 | 43,115
Stage 1 collective [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans and other financing | 180,456,655 | 152,543,931
Non-financial public sector | 13,230 | 8,573
Other financial entities | 23 | 246
Non-financial private sector | 180,443,402 | 152,535,112
Stage 1 collective [member] | Individuals [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 114,240,780 | 117,874,202
Stage 1 collective [member] | Manufacturing Industry [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 10,262,036 | 4,722,054
Stage 1 collective [member] | Agricultural and cattle industry [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 14,415,093 | 7,696,443
Stage 1 collective [member] | Services [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 22,280,971 | 13,205,385
Stage 1 collective [member] | Commercial activities [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 13,244,682 | 5,248,612
Stage 1 collective [member] | Exploration of mines and quarries [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 653,112 | 229,146
Stage 1 collective [member] | Financial intermediation [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 1,038,512 | 930,240
Stage 1 collective [member] | Construction activities [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 3,055,656 | 1,385,661
Stage 1 collective [member] | Electricity supply and gas [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 155,514 | 100,044
Stage 1 collective [member] | Public administration [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 1,037,333 | 1,103,771
Stage 1 collective [member] | Water supply and public sanitation [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 59,713 | 39,554
Stage 1 individual [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans and other financing | 68,333,255 | 128,020,746
Non-financial public sector | 3,601,297 | 8,773,060
Other financial entities | 1,839,235 | 5,417,881
Non-financial private sector | 62,892,723 | 113,829,805
Stage 1 individual [member] | Individuals [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 881,453 | 511,834
Stage 1 individual [member] | Manufacturing Industry [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 14,025,285 | 46,359,585
Stage 1 individual [member] | Agricultural and cattle industry [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 6,741,231 | 11,045,886
Stage 1 individual [member] | Services [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 11,185,975 | 13,175,749
Stage 1 individual [member] | Commercial activities [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 9,222,944 | 13,123,381
Stage 1 individual [member] | Exploration of mines and quarries [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 14,544,611 | 20,069,007
Stage 1 individual [member] | Financial intermediation [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 3,731,946 | 3,840,710
Stage 1 individual [member] | Construction activities [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 1,444,030 | 2,241,773
Stage 1 individual [member] | Electricity supply and gas [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 1,115,248 | 3,435,177
Stage 1 individual [member] | Public administration [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector |  | 26,703
Stage 2 collective [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans and other financing | 11,133,013 | 17,511,125
Non-financial public sector | 175 | 221
Non-financial private sector | 11,132,838 | 17,510,904
Stage 2 collective [member] | Individuals [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 6,217,494 | 9,172,222
Stage 2 collective [member] | Manufacturing Industry [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 679,770 | 1,244,104
Stage 2 collective [member] | Agricultural and cattle industry [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 966,605 | 2,857,436
Stage 2 collective [member] | Services [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 1,815,627 | 2,069,526
Stage 2 collective [member] | Commercial activities [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 1,001,929 | 1,420,453
Stage 2 collective [member] | Exploration of mines and quarries [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 35,095 | 66,215
Stage 2 collective [member] | Financial intermediation [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 32,755 | 83,338
Stage 2 collective [member] | Construction activities [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 291,532 | 456,169
Stage 2 collective [member] | Electricity supply and gas [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 8,092 | 9,827
Stage 2 collective [member] | Public administration [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 82,856 | 128,161
Stage 2 collective [member] | Water supply and public sanitation [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 1,083 | 3,453
Stage 2 individual [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans and other financing | 4,396,524 | 4,284,909
Non-financial private sector | 4,396,524 | 4,284,909
Stage 2 individual [member] | Manufacturing Industry [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 1,526,516 | 843,873
Stage 2 individual [member] | Agricultural and cattle industry [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 2,759,232 | 3,165,627
Stage 2 individual [member] | Services [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 110,206 | 72,040
Stage 2 individual [member] | Commercial activities [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 570 | 199,317
Stage 2 individual [member] | Construction activities [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector |  | 4,052
Stage 3 [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Loans and other financing | 3,029,870 | 5,272,831
Non-financial public sector | 103 | 94
Non-financial private sector | 3,029,767 | 5,272,737
Stage 3 [member] | Individuals [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 685,859 | 1,980,256
Stage 3 [member] | Manufacturing Industry [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 498,780 | 1,624,661
Stage 3 [member] | Agricultural and cattle industry [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 435,379 | 554,555
Stage 3 [member] | Services [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 107,590 | 346,332
Stage 3 [member] | Commercial activities [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 301,854 | 567,853
Stage 3 [member] | Exploration of mines and quarries [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 873,558 | 11,854
Stage 3 [member] | Financial intermediation [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 5,648 | 18,248
Stage 3 [member] | Construction activities [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 114,440 | 152,667
Stage 3 [member] | Electricity supply and gas [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 179 | 1,483
Stage 3 [member] | Public administration [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | 6,207 | 14,720
Stage 3 [member] | Water supply and public sanitation [member] |  |
Disclosure of detailed information about financial instruments [line items] |  |
Non-financial private sector | $ 273 | $ 108

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