ASSETS AND LIABILITIES IN FOREIGN CURRENCY (Details) - ARS ($) $ in Thousands	Dec. 31, 2025	Dec. 31, 2024
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	$ (239,862,750)	$ 23,030,376
ASSETS
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	1,985,870,085	1,255,703,197
LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	2,225,732,835	1,232,672,821
US Dollar
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	(245,080,878)
US Dollar \| ASSETS
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	1,961,942,927
US Dollar \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	2,207,023,805
Euro
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	(2,955,350)
Euro \| ASSETS
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	15,611,655
Euro \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	18,567,005
Real
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	45,107
Real \| ASSETS
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	45,319
Real \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	212
Other
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	8,128,371
Other \| ASSETS
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	8,270,184
Other \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	141,813
Deposits \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	1,714,331,780	1,119,867,567
Deposits \| US Dollar \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	1,700,713,029
Deposits \| Euro \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	13,618,751
Non-financial public sector \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	13,172,700	12,049,670
Non-financial public sector \| US Dollar \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	13,170,212
Non-financial public sector \| Euro \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	2,488
Financial sector \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	4,805	410
Financial sector \| US Dollar \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	4,805
Non-financial private sector and foreign residents \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	1,701,154,275	1,107,817,487
Non-financial private sector and foreign residents \| US Dollar \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	1,687,538,012
Non-financial private sector and foreign residents \| Euro \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	13,616,263
Other financial liabilities \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	56,722,106	48,084,770
Other financial liabilities \| US Dollar \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	53,242,505
Other financial liabilities \| Euro \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	3,337,594
Other financial liabilities \| Real \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	212
Other financial liabilities \| Other \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	141,795
Financing received from the Argentine Central Bank and other financial entities \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	371,944,377	23,043,361
Financing received from the Argentine Central Bank and other financial entities \| US Dollar \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	370,337,703
Financing received from the Argentine Central Bank and other financial entities \| Euro \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	1,606,674
Unsubordinated negotiable obligations \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	81,786,381	40,820,459
Unsubordinated negotiable obligations \| US Dollar \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	81,786,381
Other non-financial liabilities \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	948,191	856,664
Other non-financial liabilities \| US Dollar \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	944,187
Other non-financial liabilities \| Euro \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	3,986
Other non-financial liabilities \| Other \| LIABILITIES
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	18
Cash and due from banks \| ASSETS
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	872,331,983	589,354,547
Cash and due from banks \| US Dollar \| ASSETS
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	850,170,067
Cash and due from banks \| Euro \| ASSETS
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	13,846,413
Cash and due from banks \| Real \| ASSETS
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	45,319
Cash and due from banks \| Other \| ASSETS
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	8,270,184
Debt securities at fair value through profit or loss \| ASSETS
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	66,376,090	28,651,162
Debt securities at fair value through profit or loss \| US Dollar \| ASSETS
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	66,376,090
Derivatives \| ASSETS
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency		173,162
Other financial assets \| ASSETS
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	36,784,605	8,642,779
Other financial assets \| US Dollar \| ASSETS
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	36,784,605
Loans and other financing \| ASSETS
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	804,594,773	487,277,884
Loans and other financing \| US Dollar \| ASSETS
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	802,829,531
Loans and other financing \| Euro \| ASSETS
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	1,765,242
Other debt securities \| ASSETS
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	63,243,148	134,111,166
Other debt securities \| US Dollar \| ASSETS
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	63,243,148
Financial assets in guarantee \| ASSETS
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	142,199,254	6,385,160
Financial assets in guarantee \| US Dollar \| ASSETS
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	142,199,254
Other non-financial assets \| ASSETS
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	340,232	$ 1,107,337
Other non-financial assets \| US Dollar \| ASSETS
Disclosure Of Effect Of Changes In Foreign Exchange Rates Explanatory [line items]
Assets and (liabilities) in foreign currency	$ 340,232