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Loss Allowance for Expected Credit Losses On Credit Exposures Not Measured at Fair Value Through Profit or Loss - Summary of Changes in Gross Carrying Amount and ECL Allowances (Detail) - Commercial [member] - ARS ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020
Disclosure of internal credit grades [line items] |  |
Gross carrying amount, beginning balance | $ 112,138,243 | $ 202,560,830
Gross carrying amount, ending balance | 86,234,118 | 112,138,243
Expected credit loss allowance, beginning balance | 3,113,612 | 3,315,225
Expected credit loss allowance related to sundry debtors, ending balance | 3,795,667 | 3,113,612
Assets originated or purchased [member] |  |
Disclosure of internal credit grades [line items] |  |
Gross carrying amount | 106,402,692 | 97,886,030
Expected credit loss allowance | 5,154,122 | 2,845,181
Assets derecognized or repaid [member] |  |
Disclosure of internal credit grades [line items] |  |
Gross carrying amount | (87,455,367) | (158,318,142)
Expected credit loss allowance | (2,082,636) | (1,773,612)
Amount Written Off [Member] |  |
Disclosure of internal credit grades [line items] |  |
Gross carrying amount | (922,381) | (566,521)
Expected credit loss allowance | (455,855) | (497,816)
Monetary effects [member] |  |
Disclosure of internal credit grades [line items] |  |
Gross carrying amount | (43,929,069) | (29,423,954)
Expected credit loss allowance | (1,933,576) | (775,366)
Impairments stage 1 [member] |  |
Disclosure of internal credit grades [line items] |  |
Gross carrying amount, beginning balance | 103,143,331 | 193,236,603
Gross carrying amount, ending balance | 80,734,484 | 103,143,331
Expected credit loss allowance, beginning balance | 924,727 | 658,755
Expected credit loss allowance related to sundry debtors, ending balance | 665,919 | 924,727
Impairments stage 1 [member] | Assets originated or purchased [member] |  |
Disclosure of internal credit grades [line items] |  |
Gross carrying amount | 102,232,782 | 94,241,056
Expected credit loss allowance | 1,838,217 | 2,208,850
Impairments stage 1 [member] | Assets derecognized or repaid [member] |  |
Disclosure of internal credit grades [line items] |  |
Gross carrying amount | (82,480,461) | (155,364,844)
Expected credit loss allowance | (861,783) | (505,789)
Impairments stage 1 [member] | Transfers to Stage one [member] |  |
Disclosure of internal credit grades [line items] |  |
Gross carrying amount | 539 | 321,712
Expected credit loss allowance | 12 | 14,715
Impairments stage 1 [member] | Transfers to Stage two [member] |  |
Disclosure of internal credit grades [line items] |  |
Gross carrying amount |  | (571,954)
Expected credit loss allowance |  | (1,783)
Impairments stage 1 [member] | Transfers to stage three [member] |  |
Disclosure of internal credit grades [line items] |  |
Gross carrying amount | (1,034,242) | (2,327,375)
Expected credit loss allowance | (896,024) | (1,402,566)
Impairments stage 1 [member] | Monetary effects [member] |  |
Disclosure of internal credit grades [line items] |  |
Gross carrying amount | (41,127,465) | (26,391,867)
Expected credit loss allowance | (339,230) | (47,455)
Impairments stage 2 [member] |  |
Disclosure of internal credit grades [line items] |  |
Gross carrying amount, beginning balance | 6,636,186 | 6,467,714
Gross carrying amount, ending balance | 4,736,047 | 6,636,186
Expected credit loss allowance, beginning balance | 1,007,573 | 688,336
Expected credit loss allowance related to sundry debtors, ending balance | 2,511,535 | 1,007,573
Impairments stage 2 [member] | Assets originated or purchased [member] |  |
Disclosure of internal credit grades [line items] |  |
Gross carrying amount | 4,169,910 | 3,644,974
Expected credit loss allowance | 3,315,905 | 636,331
Impairments stage 2 [member] | Assets derecognized or repaid [member] |  |
Disclosure of internal credit grades [line items] |  |
Gross carrying amount | (3,621,736) | (1,399,089)
Expected credit loss allowance | (524,662) | (39,701)
Impairments stage 2 [member] | Transfers to Stage one [member] |  |
Disclosure of internal credit grades [line items] |  |
Gross carrying amount | (539) | (321,712)
Expected credit loss allowance | (12) | (14,715)
Impairments stage 2 [member] | Transfers to Stage two [member] |  |
Disclosure of internal credit grades [line items] |  |
Gross carrying amount | 131,193 | 571,954
Expected credit loss allowance | 29,267 | 1,783
Impairments stage 2 [member] | Transfers to stage three [member] |  |
Disclosure of internal credit grades [line items] |  |
Gross carrying amount | (166,346) | (237,394)
Expected credit loss allowance | (37,119) | (9,050)
Impairments stage 2 [member] | Monetary effects [member] |  |
Disclosure of internal credit grades [line items] |  |
Gross carrying amount | (2,412,621) | (2,090,261)
Expected credit loss allowance | (1,279,417) | (255,411)
Impairments Stage 3 [member] |  |
Disclosure of internal credit grades [line items] |  |
Gross carrying amount, beginning balance | 2,358,726 | 2,856,513
Gross carrying amount, ending balance | 763,587 | 2,358,726
Expected credit loss allowance, beginning balance | 1,181,312 | 1,968,134
Expected credit loss allowance related to sundry debtors, ending balance | 618,213 | 1,181,312
Impairments Stage 3 [member] | Assets derecognized or repaid [member] |  |
Disclosure of internal credit grades [line items] |  |
Gross carrying amount | (1,353,170) | (1,554,209)
Expected credit loss allowance | (696,191) | (1,228,122)
Impairments Stage 3 [member] | Transfers to Stage two [member] |  |
Disclosure of internal credit grades [line items] |  |
Gross carrying amount | (131,193) |
Expected credit loss allowance | (29,267) |
Impairments Stage 3 [member] | Transfers to stage three [member] |  |
Disclosure of internal credit grades [line items] |  |
Gross carrying amount | 1,200,588 | 2,564,769
Expected credit loss allowance | 933,143 | 1,411,616
Impairments Stage 3 [member] | Amount Written Off [Member] |  |
Disclosure of internal credit grades [line items] |  |
Gross carrying amount | (922,381) | (566,521)
Expected credit loss allowance | (455,855) | (497,816)
Impairments Stage 3 [member] | Monetary effects [member] |  |
Disclosure of internal credit grades [line items] |  |
Gross carrying amount | (388,983) | (941,826)
Expected credit loss allowance | $ (314,929) | $ (472,500)

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