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Credit risk exposure and allowances - Disclosure Of Allowances (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
ARS ($)
Not credit-impaired [member] | Stage 1 [Member] | Loss allowances collectively assessed [member] | Opening balance (under IFRS 9) [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income $ 2,619,792
Loss allowances on loan commitments and financial guarantees 432,207
Not credit-impaired [member] | Stage 1 [Member] | Loss allowances collectively assessed [member] | Transfers from Stage 1 to Stage 2 [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (1,924,599)
Loss allowances on loan commitments and financial guarantees (151,914)
Not credit-impaired [member] | Stage 1 [Member] | Loss allowances collectively assessed [member] | Transfers from Stage 2 to Stage 1 [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 800,397
Loss allowances on loan commitments and financial guarantees 94,655
Not credit-impaired [member] | Stage 1 [Member] | Loss allowances collectively assessed [member] | Transfers from Stage 1 or 2 to Stage 3 [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (39,919)
Loss allowances on loan commitments and financial guarantees (2,891)
Not credit-impaired [member] | Stage 1 [Member] | Loss allowances collectively assessed [member] | Transfers from Stage 3 to Stage 1 or 2 [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 15,867
Loss allowances on loan commitments and financial guarantees 1,393
Not credit-impaired [member] | Stage 1 [Member] | Loss allowances collectively assessed [member] | Changes without transfers between Stages [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (221,428)
Loss allowances on loan commitments and financial guarantees 162,639
Not credit-impaired [member] | Stage 1 [Member] | Loss allowances collectively assessed [member] | New financial assets originated [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 5,574,300
Not credit-impaired [member] | Stage 1 [Member] | Loss allowances collectively assessed [member] | New Loan Commitments And Financial Guarantees Originated [Member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on loan commitments and financial guarantees 392,836
Not credit-impaired [member] | Stage 1 [Member] | Loss allowances collectively assessed [member] | Repayments [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (4,257,378)
Loss allowances on loan commitments and financial guarantees (189,989)
Not credit-impaired [member] | Stage 1 [Member] | Loss allowances collectively assessed [member] | Write-offs [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 0
Loss allowances on loan commitments and financial guarantees 0
Not credit-impaired [member] | Stage 1 [Member] | Loss allowances collectively assessed [member] | Foreign exchange [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 357,715
Loss allowances on loan commitments and financial guarantees 3,831
Not credit-impaired [member] | Stage 1 [Member] | Loss allowances collectively assessed [member] | Gain of control over subsidiaries [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 118,312
Not credit-impaired [member] | Stage 1 [Member] | Loss allowances collectively assessed [member] | Inflation adjustment [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (1,371,575)
Loss allowances on loan commitments and financial guarantees (182,266)
Not credit-impaired [member] | Stage 1 [Member] | Loss allowances collectively assessed [member] | Other Adjustments [Member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 2,387,810
Not credit-impaired [member] | Stage 1 [Member] | Loss allowances collectively assessed [member] | Closing balance [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 4,059,294
Loss allowances on loan commitments and financial guarantees 560,501
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances collectively assessed [member] | Opening balance (under IFRS 9) [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 1,178,408
Loss allowances on loan commitments and financial guarantees 100,150
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances collectively assessed [member] | Transfers from Stage 1 to Stage 2 [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 6,657,589
Loss allowances on loan commitments and financial guarantees 442,347
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances collectively assessed [member] | Transfers from Stage 2 to Stage 1 [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (2,012,315)
Loss allowances on loan commitments and financial guarantees (207,836)
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances collectively assessed [member] | Transfers from Stage 1 or 2 to Stage 3 [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (1,803,284)
Loss allowances on loan commitments and financial guarantees (8,170)
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances collectively assessed [member] | Transfers from Stage 3 to Stage 1 or 2 [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 44,213
Loss allowances on loan commitments and financial guarantees 481
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances collectively assessed [member] | Changes without transfers between Stages [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 126,266
Loss allowances on loan commitments and financial guarantees (48,430)
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances collectively assessed [member] | New financial assets originated [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 159,904
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances collectively assessed [member] | New Loan Commitments And Financial Guarantees Originated [Member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on loan commitments and financial guarantees 171,209
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances collectively assessed [member] | Repayments [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (1,113,597)
Loss allowances on loan commitments and financial guarantees (63,408)
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances collectively assessed [member] | Write-offs [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (2)
Loss allowances on loan commitments and financial guarantees 0
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances collectively assessed [member] | Foreign exchange [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 127,973
Loss allowances on loan commitments and financial guarantees 1,894
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances collectively assessed [member] | Gain of control over subsidiaries [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 1,366
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances collectively assessed [member] | Inflation adjustment [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (776,257)
Loss allowances on loan commitments and financial guarantees (54,029)
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances collectively assessed [member] | Other Adjustments [Member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 4,057,444
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances collectively assessed [member] | Closing balance [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 6,647,708
Loss allowances on loan commitments and financial guarantees 334,208
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances individually assesed [member] | Opening balance (under IFRS 9) [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 142,649
Loss allowances on loan commitments and financial guarantees 240
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances individually assesed [member] | Transfers from Stage 1 to Stage 2 [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 63,175
Loss allowances on loan commitments and financial guarantees 386
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances individually assesed [member] | Transfers from Stage 2 to Stage 1 [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (2,618)
Loss allowances on loan commitments and financial guarantees (18)
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances individually assesed [member] | Transfers from Stage 1 or 2 to Stage 3 [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (248,102)
Loss allowances on loan commitments and financial guarantees (161)
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances individually assesed [member] | Transfers from Stage 3 to Stage 1 or 2 [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 53,098
Loss allowances on loan commitments and financial guarantees 588
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances individually assesed [member] | Changes without transfers between Stages [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 119,558
Loss allowances on loan commitments and financial guarantees 10,730
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances individually assesed [member] | New financial assets originated [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 139,052
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances individually assesed [member] | New Loan Commitments And Financial Guarantees Originated [Member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on loan commitments and financial guarantees 1,281
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances individually assesed [member] | Repayments [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (44,822)
Loss allowances on loan commitments and financial guarantees (202)
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances individually assesed [member] | Write-offs [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 0
Loss allowances on loan commitments and financial guarantees 0
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances individually assesed [member] | Foreign exchange [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 22,176
Loss allowances on loan commitments and financial guarantees 225
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances individually assesed [member] | Gain of control over subsidiaries [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 0
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances individually assesed [member] | Inflation adjustment [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (65,557)
Loss allowances on loan commitments and financial guarantees (1,383)
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances individually assesed [member] | Other Adjustments [Member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 0
Not credit-impaired [member] | Stage 2 [Member] | Loss allowances individually assesed [member] | Closing balance [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 178,609
Loss allowances on loan commitments and financial guarantees 11,686
Credit-impaired | Stage 3 [Member] | Loss allowances collectively assessed [member] | Opening balance (under IFRS 9) [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 2,081,940
Loss allowances on loan commitments and financial guarantees 17,223
Credit-impaired | Stage 3 [Member] | Loss allowances collectively assessed [member] | Transfers from Stage 1 to Stage 2 [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 0
Loss allowances on loan commitments and financial guarantees 0
Credit-impaired | Stage 3 [Member] | Loss allowances collectively assessed [member] | Transfers from Stage 2 to Stage 1 [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 0
Loss allowances on loan commitments and financial guarantees 0
Credit-impaired | Stage 3 [Member] | Loss allowances collectively assessed [member] | Transfers from Stage 1 or 2 to Stage 3 [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 4,713,131
Loss allowances on loan commitments and financial guarantees 126,548
Credit-impaired | Stage 3 [Member] | Loss allowances collectively assessed [member] | Transfers from Stage 3 to Stage 1 or 2 [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (501,933)
Loss allowances on loan commitments and financial guarantees (103,106)
Credit-impaired | Stage 3 [Member] | Loss allowances collectively assessed [member] | Changes without transfers between Stages [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 639,811
Loss allowances on loan commitments and financial guarantees 569
Credit-impaired | Stage 3 [Member] | Loss allowances collectively assessed [member] | New financial assets originated [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 446,884
Credit-impaired | Stage 3 [Member] | Loss allowances collectively assessed [member] | New Loan Commitments And Financial Guarantees Originated [Member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on loan commitments and financial guarantees 6,464
Credit-impaired | Stage 3 [Member] | Loss allowances collectively assessed [member] | Repayments [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (1,111,743)
Loss allowances on loan commitments and financial guarantees (16,199)
Credit-impaired | Stage 3 [Member] | Loss allowances collectively assessed [member] | Write-offs [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (2,787,695)
Loss allowances on loan commitments and financial guarantees (35)
Credit-impaired | Stage 3 [Member] | Loss allowances collectively assessed [member] | Foreign exchange [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 8,884
Loss allowances on loan commitments and financial guarantees 0
Credit-impaired | Stage 3 [Member] | Loss allowances collectively assessed [member] | Gain of control over subsidiaries [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 114,505
Credit-impaired | Stage 3 [Member] | Loss allowances collectively assessed [member] | Inflation adjustment [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (1,011,534)
Loss allowances on loan commitments and financial guarantees (8,707)
Credit-impaired | Stage 3 [Member] | Loss allowances collectively assessed [member] | Other Adjustments [Member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (3,162)
Credit-impaired | Stage 3 [Member] | Loss allowances collectively assessed [member] | Closing balance [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 2,589,088
Loss allowances on loan commitments and financial guarantees 22,757
Credit-impaired | Stage 3 [Member] | Loss allowances individually assesed [member] | Opening balance (under IFRS 9) [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 916,764
Loss allowances on loan commitments and financial guarantees 1,406
Credit-impaired | Stage 3 [Member] | Loss allowances individually assesed [member] | Transfers from Stage 1 to Stage 2 [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 0
Loss allowances on loan commitments and financial guarantees 0
Credit-impaired | Stage 3 [Member] | Loss allowances individually assesed [member] | Transfers from Stage 2 to Stage 1 [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 0
Loss allowances on loan commitments and financial guarantees 0
Credit-impaired | Stage 3 [Member] | Loss allowances individually assesed [member] | Transfers from Stage 1 or 2 to Stage 3 [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 415,789
Loss allowances on loan commitments and financial guarantees 826
Credit-impaired | Stage 3 [Member] | Loss allowances individually assesed [member] | Transfers from Stage 3 to Stage 1 or 2 [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (187,084)
Loss allowances on loan commitments and financial guarantees (784)
Credit-impaired | Stage 3 [Member] | Loss allowances individually assesed [member] | Changes without transfers between Stages [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 1,784,274
Loss allowances on loan commitments and financial guarantees 469
Credit-impaired | Stage 3 [Member] | Loss allowances individually assesed [member] | New financial assets originated [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 309,836
Credit-impaired | Stage 3 [Member] | Loss allowances individually assesed [member] | New Loan Commitments And Financial Guarantees Originated [Member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on loan commitments and financial guarantees 0
Credit-impaired | Stage 3 [Member] | Loss allowances individually assesed [member] | Repayments [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (130,888)
Loss allowances on loan commitments and financial guarantees 0
Credit-impaired | Stage 3 [Member] | Loss allowances individually assesed [member] | Write-offs [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (1,880)
Loss allowances on loan commitments and financial guarantees 0
Credit-impaired | Stage 3 [Member] | Loss allowances individually assesed [member] | Foreign exchange [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 528,933
Loss allowances on loan commitments and financial guarantees 0
Credit-impaired | Stage 3 [Member] | Loss allowances individually assesed [member] | Gain of control over subsidiaries [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 0
Credit-impaired | Stage 3 [Member] | Loss allowances individually assesed [member] | Inflation adjustment [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (660,983)
Loss allowances on loan commitments and financial guarantees (492)
Credit-impaired | Stage 3 [Member] | Loss allowances individually assesed [member] | Other Adjustments [Member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 0
Credit-impaired | Stage 3 [Member] | Loss allowances individually assesed [member] | Closing balance [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 2,974,761
Loss allowances on loan commitments and financial guarantees 1,425
Total credit impaired [member] | Opening balance (under IFRS 9) [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 6,939,553
Loss allowances on loan commitments and financial guarantees 551,226
Total credit impaired [member] | Transfers from Stage 1 to Stage 2 [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 4,796,165
Loss allowances on loan commitments and financial guarantees 290,819
Total credit impaired [member] | Transfers from Stage 2 to Stage 1 [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (1,214,536)
Loss allowances on loan commitments and financial guarantees (113,199)
Total credit impaired [member] | Transfers from Stage 1 or 2 to Stage 3 [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 3,037,615
Loss allowances on loan commitments and financial guarantees 116,152
Total credit impaired [member] | Transfers from Stage 3 to Stage 1 or 2 [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (575,839)
Loss allowances on loan commitments and financial guarantees (101,428)
Total credit impaired [member] | Changes without transfers between Stages [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 2,448,481
Loss allowances on loan commitments and financial guarantees 125,977
Total credit impaired [member] | New financial assets originated [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 6,629,976
Total credit impaired [member] | New Loan Commitments And Financial Guarantees Originated [Member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on loan commitments and financial guarantees 571,790
Total credit impaired [member] | Repayments [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (6,658,428)
Loss allowances on loan commitments and financial guarantees (269,798)
Total credit impaired [member] | Write-offs [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (2,789,577)
Loss allowances on loan commitments and financial guarantees (35)
Total credit impaired [member] | Foreign exchange [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 1,045,681
Loss allowances on loan commitments and financial guarantees 5,950
Total credit impaired [member] | Gain of control over subsidiaries [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 234,183
Total credit impaired [member] | Inflation adjustment [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income (3,885,906)
Loss allowances on loan commitments and financial guarantees (246,877)
Total credit impaired [member] | Other Adjustments [Member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 6,442,092
Total credit impaired [member] | Closing balance [member]  
Disclosure of impairment loss and reversal of impairment loss [line items]  
Loss allowances on financial assets at amortised cost and at fair value through other comprehensive income 16,449,460
Loss allowances on loan commitments and financial guarantees $ 930,577