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Determination of fair value (Details) - BRL (R$)
R$ in Thousands
Dec. 31, 2025
Dec. 31, 2024
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading R$ 198,834,060 R$ 149,985,414
Investments in associates measured at fair value 1,521,675 1,546,278
Total Financial Assets at FVTPL including investments in associates 241,276,316 197,731,488
Financial assets at fair value through other comprehensive income [abstract]    
Investments in equity instruments designated at fair value through other comprehensive income 42,223,349 50,879,981
Financial assets at fair value through other comprehensive income 42,223,349 50,879,981
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities 7,406,932 2,836,146
Financial Assets At Amortized Cost Securities Purchased Under Agreements To Resell 17,063,099 22,057,137
Financial Assets At Amortized Cost Securities Trading And Intermediation 6,299,483 6,499,097
Financial Assets At Amortized Cost Accounts Receivable 1,366,424 778,943
Financial Assets At Amortized Cost Loan Operations 34,142,085 29,228,463
Financial Assets At Amortized Cost Other Financial Assets 16,912,992 13,232,997
Evaluated at amortized cost 83,191,015 74,632,783
Financial liabilities at fair value through profit or loss [abstract]    
Financial Liabilities At Fair Value Through Profit Or Loss Securities Loaned 21,043,459 15,253,376
Derivative financial liabilities 37,546,940 40,047,687
Fair value through profit or loss 58,590,399 55,301,063
Financial Liabilities Evaluated at Amortized Cost [Abstract]    
Financial Liabilities At Amortized Cost Securities Sold Under Repurchase Agreements 58,713,869 71,779,721
Financial Liabilities At Amortized Cost Securities Trading And Intermediation 22,420,806 18,474,978
Financial Liabilities At Amortized Cost, Financial Instruments Payable 123,403,515 95,248,482
Financial Liabilities At Amortized Cost Borrowings 237,894 1,666,432
Financial Liabilities At Amortized Cost Accounts Payables 810,157 763,465
Financial Liabilities At Amortized Cost Other Financial Liabilities 12,320,730 14,730,863
Evaluated at amortized cost 217,906,971 202,663,941
Securities Loaned [Domain]    
Financial liabilities at fair value through profit or loss [abstract]    
Financial Liabilities At Fair Value Through Profit Or Loss Securities Loaned 20,388,644 14,830,405
Corporate debt – local [Member]    
Financial liabilities at fair value through profit or loss [abstract]    
Financial Liabilities At Fair Value Through Profit Or Loss Securities Loaned 654,815 422,971
Swap contract [member]    
Financial liabilities at fair value through profit or loss [abstract]    
Derivative financial liabilities 14,937,416 14,000,255
Forward contract [member]    
Financial liabilities at fair value through profit or loss [abstract]    
Derivative financial liabilities 1,681,224 2,083,292
Futures contract [member]    
Financial liabilities at fair value through profit or loss [abstract]    
Derivative financial liabilities 3,664,058 1,929,536
Option contract [member]    
Financial liabilities at fair value through profit or loss [abstract]    
Derivative financial liabilities 17,264,242 22,034,604
Brazilian sovereign bonds [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 56,313,856 46,736,162
Financial assets at fair value through other comprehensive income [abstract]    
Investments in equity instruments designated at fair value through other comprehensive income 39,043,715 46,981,007
Foreign sovereign bonds    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 1,818,020  
Financial assets at fair value through other comprehensive income [abstract]    
Investments in equity instruments designated at fair value through other comprehensive income 3,179,634 3,898,974
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities 282,693  
Real estate–backed instruments [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 4,276,576 4,753,274
Agribusiness–backed instruments [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 4,830,980 1,394,074
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities 474,121 211,555
Corporate debt – local [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 17,178,981 13,012,139
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities 4,428,597  
Corporate debt – foreign [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 7,987,265 8,219,727
Bank funding instruments (CDB) [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 463,133 661,664
Bank funding instruments (Others) [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 1,515,827 583,840
Structured notes [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 50,076 20,546
Investment funds [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 96,353,891 65,840,498
Equity securities [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 7,613,050 2,495,570
Others    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 432,405 6,267,920
Swap contract [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial Assets at Fair Value Through Profit or Loss, Derivative Financial Instruments 20,361,017 21,743,021
Forward contract [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial Assets at Fair Value Through Profit or Loss, Derivative Financial Instruments 1,071,790 2,692,354
Futures contract [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial Assets at Fair Value Through Profit or Loss, Derivative Financial Instruments 5,966,802 3,003,675
Option contract [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial Assets at Fair Value Through Profit or Loss, Derivative Financial Instruments 13,520,972 18,760,746
Brazilian sovereign bonds (onshore) [Member]    
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities 2,221,521  
At fair value [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 198,834,060 149,985,414
Investments in associates measured at fair value 1,521,675 1,546,278
Total Financial Assets at FVTPL including investments in associates 241,276,316 197,731,488
Financial assets at fair value through other comprehensive income [abstract]    
Financial assets at fair value through other comprehensive income 42,223,349 50,879,981
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities   2,874,382
Financial Assets At Amortized Cost Securities Purchased Under Agreements To Resell 17,117,478 22,010,879
Financial Assets At Amortized Cost Securities Trading And Intermediation 6,299,483 6,499,097
Financial Assets At Amortized Cost Accounts Receivable 1,366,424 778,943
Financial Assets At Amortized Cost Loan Operations 34,549,310 29,145,291
Financial Assets At Amortized Cost Other Financial Assets 16,912,992 13,232,997
Evaluated at amortized cost 84,831,017 74,541,589
Financial liabilities at fair value through profit or loss [abstract]    
Fair value through profit or loss 58,590,399 55,301,063
Financial Liabilities Evaluated at Amortized Cost [Abstract]    
Financial Liabilities At Amortized Cost Securities Sold Under Repurchase Agreements 57,469,033 71,693,244
Financial Liabilities At Amortized Cost Securities Trading And Intermediation 22,420,806 18,474,978
Financial Liabilities At Amortized Cost, Financial Instruments Payable 123,212,421 94,662,035
Financial Liabilities At Amortized Cost Borrowings 239,368 1,666,432
Financial Liabilities At Amortized Cost Accounts Payables 810,157 763,465
Financial Liabilities At Amortized Cost Other Financial Liabilities 12,320,730 14,730,863
Evaluated at amortized cost 216,472,515 201,991,017
At fair value [member] | Securities Loaned [Domain]    
Financial liabilities at fair value through profit or loss [abstract]    
Financial Liabilities At Fair Value Through Profit Or Loss Securities Loaned 20,388,644 14,830,405
At fair value [member] | Corporate debt – local [Member]    
Financial liabilities at fair value through profit or loss [abstract]    
Financial Liabilities At Fair Value Through Profit Or Loss Securities Loaned 654,815 422,971
At fair value [member] | Swap contract [member]    
Financial liabilities at fair value through profit or loss [abstract]    
Derivative financial liabilities 14,937,416 14,000,255
At fair value [member] | Forward contract [member]    
Financial liabilities at fair value through profit or loss [abstract]    
Derivative financial liabilities 1,681,224 2,083,292
At fair value [member] | Futures contract [member]    
Financial liabilities at fair value through profit or loss [abstract]    
Derivative financial liabilities 3,664,058 1,929,536
At fair value [member] | Option contract [member]    
Financial liabilities at fair value through profit or loss [abstract]    
Derivative financial liabilities 17,264,242 22,034,604
At fair value [member] | Brazilian sovereign bonds [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 56,313,856 46,736,162
Financial assets at fair value through other comprehensive income [abstract]    
Investments in equity instruments designated at fair value through other comprehensive income 39,043,715 46,981,007
At fair value [member] | Foreign sovereign bonds    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 1,818,020 0
Financial assets at fair value through other comprehensive income [abstract]    
Investments in equity instruments designated at fair value through other comprehensive income 3,179,634 3,898,974
Financial assets at fair value through other comprehensive income 3,179,634 3,898,974
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities 282,696  
At fair value [member] | Real estate–backed instruments [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 4,276,576 4,753,274
At fair value [member] | Agribusiness–backed instruments [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 4,830,980 1,394,074
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities 486,205 212,103
At fair value [member] | Corporate debt – local [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 17,178,981 13,012,139
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities 5,594,901 0
At fair value [member] | Corporate debt – foreign [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 7,987,265 8,219,727
At fair value [member] | Bank funding instruments (CDB) [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 463,133 661,664
At fair value [member] | Bank funding instruments (Others) [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 1,515,827 583,840
At fair value [member] | Structured notes [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 50,076 20,546
At fair value [member] | Investment funds [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 96,353,891 65,840,498
At fair value [member] | Equity securities [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 7,613,050 2,495,570
At fair value [member] | Others    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 432,405 6,267,920
At fair value [member] | Swap contract [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial Assets at Fair Value Through Profit or Loss, Derivative Financial Instruments 20,361,017 21,743,021
At fair value [member] | Forward contract [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial Assets at Fair Value Through Profit or Loss, Derivative Financial Instruments 1,071,790 2,692,354
At fair value [member] | Futures contract [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial Assets at Fair Value Through Profit or Loss, Derivative Financial Instruments 5,966,802 3,003,675
At fair value [member] | Option contract [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial Assets at Fair Value Through Profit or Loss, Derivative Financial Instruments 13,520,972 18,760,746
At fair value [member] | Brazilian sovereign bonds (onshore) [Member]    
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities 2,221,528  
Level 1 of fair value hierarchy [member]    
Financial assets at fair value through profit or loss [abstract]    
Investments in associates measured at fair value   0
Total Financial Assets at FVTPL including investments in associates 175,331,449 126,371,744
Financial assets at fair value through other comprehensive income [abstract]    
Financial assets at fair value through other comprehensive income 42,223,349 50,879,981
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities   0
Financial Assets At Amortized Cost Securities Purchased Under Agreements To Resell 0 0
Financial Assets At Amortized Cost Securities Trading And Intermediation 0 0
Financial Assets At Amortized Cost Accounts Receivable 0 0
Financial Assets At Amortized Cost Loan Operations 0 0
Financial Assets At Amortized Cost Other Financial Assets 0 0
Evaluated at amortized cost 2,504,224 0
Financial liabilities at fair value through profit or loss [abstract]    
Fair value through profit or loss 24,052,702 16,759,941
Financial Liabilities Evaluated at Amortized Cost [Abstract]    
Financial Liabilities At Amortized Cost Securities Sold Under Repurchase Agreements 0 0
Financial Liabilities At Amortized Cost Securities Trading And Intermediation 0 0
Financial Liabilities At Amortized Cost, Financial Instruments Payable 0 0
Financial Liabilities At Amortized Cost Borrowings 0 0
Financial Liabilities At Amortized Cost Accounts Payables 0 0
Financial Liabilities At Amortized Cost Other Financial Liabilities 0 0
Evaluated at amortized cost 0 0
Level 1 of fair value hierarchy [member] | Securities Loaned [Domain]    
Financial liabilities at fair value through profit or loss [abstract]    
Financial Liabilities At Fair Value Through Profit Or Loss Securities Loaned 20,388,644 14,830,405
Level 1 of fair value hierarchy [member] | Corporate debt – local [Member]    
Financial liabilities at fair value through profit or loss [abstract]    
Financial Liabilities At Fair Value Through Profit Or Loss Securities Loaned 0 0
Level 1 of fair value hierarchy [member] | Swap contract [member]    
Financial liabilities at fair value through profit or loss [abstract]    
Derivative financial liabilities 0 0
Level 1 of fair value hierarchy [member] | Forward contract [member]    
Financial liabilities at fair value through profit or loss [abstract]    
Derivative financial liabilities 0 0
Level 1 of fair value hierarchy [member] | Futures contract [member]    
Financial liabilities at fair value through profit or loss [abstract]    
Derivative financial liabilities 3,664,058 1,929,536
Level 1 of fair value hierarchy [member] | Option contract [member]    
Financial liabilities at fair value through profit or loss [abstract]    
Derivative financial liabilities 0 0
Level 1 of fair value hierarchy [member] | Brazilian sovereign bonds [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 56,313,856 46,736,162
Financial assets at fair value through other comprehensive income [abstract]    
Investments in equity instruments designated at fair value through other comprehensive income 39,043,715 46,981,007
Level 1 of fair value hierarchy [member] | Foreign sovereign bonds    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 1,818,020  
Financial assets at fair value through other comprehensive income [abstract]    
Investments in equity instruments designated at fair value through other comprehensive income 3,179,634 3,898,974
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities 282,696  
Level 1 of fair value hierarchy [member] | Real estate–backed instruments [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 0 0
Level 1 of fair value hierarchy [member] | Agribusiness–backed instruments [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 0 0
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities 0 0
Level 1 of fair value hierarchy [member] | Corporate debt – local [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 0 0
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities 0 0
Level 1 of fair value hierarchy [member] | Corporate debt – foreign [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 7,987,265 8,219,727
Level 1 of fair value hierarchy [member] | Bank funding instruments (CDB) [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 0 0
Level 1 of fair value hierarchy [member] | Bank funding instruments (Others) [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 0 0
Level 1 of fair value hierarchy [member] | Structured notes [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 0 0
Level 1 of fair value hierarchy [member] | Investment funds [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 96,076,760 65,840,498
Level 1 of fair value hierarchy [member] | Equity securities [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 7,168,746 2,123,810
Level 1 of fair value hierarchy [member] | Others    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 0 447,872
Level 1 of fair value hierarchy [member] | Swap contract [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial Assets at Fair Value Through Profit or Loss, Derivative Financial Instruments 0 0
Level 1 of fair value hierarchy [member] | Forward contract [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial Assets at Fair Value Through Profit or Loss, Derivative Financial Instruments 0 0
Level 1 of fair value hierarchy [member] | Futures contract [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial Assets at Fair Value Through Profit or Loss, Derivative Financial Instruments 5,966,802 3,003,675
Level 1 of fair value hierarchy [member] | Option contract [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial Assets at Fair Value Through Profit or Loss, Derivative Financial Instruments 0 0
Level 1 of fair value hierarchy [member] | Brazilian sovereign bonds (onshore) [Member]    
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities 2,221,528  
Level 2 of fair value hierarchy [member]    
Financial assets at fair value through profit or loss [abstract]    
Investments in associates measured at fair value   0
Total Financial Assets at FVTPL including investments in associates 63,701,757 69,441,706
Financial assets at fair value through other comprehensive income [abstract]    
Financial assets at fair value through other comprehensive income 0 0
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities   2,874,382
Financial Assets At Amortized Cost Securities Purchased Under Agreements To Resell 17,117,478 22,010,879
Financial Assets At Amortized Cost Securities Trading And Intermediation 6,299,483 6,499,097
Financial Assets At Amortized Cost Accounts Receivable 1,366,424 778,943
Financial Assets At Amortized Cost Loan Operations 34,549,310 29,145,291
Financial Assets At Amortized Cost Other Financial Assets 16,912,992 13,232,997
Evaluated at amortized cost 82,326,793 74,541,589
Financial liabilities at fair value through profit or loss [abstract]    
Fair value through profit or loss 34,537,697 38,541,122
Financial Liabilities Evaluated at Amortized Cost [Abstract]    
Financial Liabilities At Amortized Cost Securities Sold Under Repurchase Agreements 57,469,033 71,693,244
Financial Liabilities At Amortized Cost Securities Trading And Intermediation 22,420,806 18,474,978
Financial Liabilities At Amortized Cost, Financial Instruments Payable 123,212,421 94,662,035
Financial Liabilities At Amortized Cost Borrowings 239,368 1,666,432
Financial Liabilities At Amortized Cost Accounts Payables 810,157 763,465
Financial Liabilities At Amortized Cost Other Financial Liabilities 12,213,571 14,614,086
Evaluated at amortized cost 216,365,356 201,874,240
Level 2 of fair value hierarchy [member] | Securities Loaned [Domain]    
Financial liabilities at fair value through profit or loss [abstract]    
Financial Liabilities At Fair Value Through Profit Or Loss Securities Loaned 0 0
Level 2 of fair value hierarchy [member] | Corporate debt – local [Member]    
Financial liabilities at fair value through profit or loss [abstract]    
Financial Liabilities At Fair Value Through Profit Or Loss Securities Loaned 654,815 422,971
Level 2 of fair value hierarchy [member] | Swap contract [member]    
Financial liabilities at fair value through profit or loss [abstract]    
Derivative financial liabilities 14,937,416 14,000,255
Level 2 of fair value hierarchy [member] | Forward contract [member]    
Financial liabilities at fair value through profit or loss [abstract]    
Derivative financial liabilities 1,681,224 2,083,292
Level 2 of fair value hierarchy [member] | Futures contract [member]    
Financial liabilities at fair value through profit or loss [abstract]    
Derivative financial liabilities 0 0
Level 2 of fair value hierarchy [member] | Option contract [member]    
Financial liabilities at fair value through profit or loss [abstract]    
Derivative financial liabilities 17,264,242 22,034,604
Level 2 of fair value hierarchy [member] | Brazilian sovereign bonds [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 0 0
Financial assets at fair value through other comprehensive income [abstract]    
Investments in equity instruments designated at fair value through other comprehensive income 0 0
Level 2 of fair value hierarchy [member] | Foreign sovereign bonds    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 0  
Financial assets at fair value through other comprehensive income [abstract]    
Investments in equity instruments designated at fair value through other comprehensive income 0 0
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities 0  
Level 2 of fair value hierarchy [member] | Real estate–backed instruments [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 4,276,576 4,753,274
Level 2 of fair value hierarchy [member] | Agribusiness–backed instruments [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 4,830,980 1,394,074
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities 486,205 212,103
Level 2 of fair value hierarchy [member] | Corporate debt – local [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 17,178,981 13,012,139
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities 5,594,901 0
Level 2 of fair value hierarchy [member] | Corporate debt – foreign [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 0 0
Level 2 of fair value hierarchy [member] | Bank funding instruments (CDB) [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 463,133 661,664
Level 2 of fair value hierarchy [member] | Bank funding instruments (Others) [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 1,515,827 583,840
Level 2 of fair value hierarchy [member] | Structured notes [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 50,076 20,546
Level 2 of fair value hierarchy [member] | Investment funds [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 0 0
Level 2 of fair value hierarchy [member] | Equity securities [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 0 0
Level 2 of fair value hierarchy [member] | Others    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 432,405 5,820,048
Level 2 of fair value hierarchy [member] | Swap contract [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial Assets at Fair Value Through Profit or Loss, Derivative Financial Instruments 20,361,017 21,743,021
Level 2 of fair value hierarchy [member] | Forward contract [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial Assets at Fair Value Through Profit or Loss, Derivative Financial Instruments 1,071,790 2,692,354
Level 2 of fair value hierarchy [member] | Futures contract [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial Assets at Fair Value Through Profit or Loss, Derivative Financial Instruments 0
Level 2 of fair value hierarchy [member] | Option contract [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial Assets at Fair Value Through Profit or Loss, Derivative Financial Instruments 13,520,972 18,760,746
Level 2 of fair value hierarchy [member] | Brazilian sovereign bonds (onshore) [Member]    
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities 0  
Level 3 of fair value hierarchy [member]    
Financial assets at fair value through profit or loss [abstract]    
Investments in associates measured at fair value 1,521,675 1,546,278
Total Financial Assets at FVTPL including investments in associates 2,243,110 1,918,038
Financial assets at fair value through other comprehensive income [abstract]    
Financial assets at fair value through other comprehensive income 0 0
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities   0
Financial Assets At Amortized Cost Securities Purchased Under Agreements To Resell 0 0
Financial Assets At Amortized Cost Securities Trading And Intermediation 0 0
Financial Assets At Amortized Cost Accounts Receivable 0 0
Financial Assets At Amortized Cost Loan Operations 0 0
Financial Assets At Amortized Cost Other Financial Assets 0 0
Evaluated at amortized cost 0 0
Financial liabilities at fair value through profit or loss [abstract]    
Fair value through profit or loss 0 0
Financial Liabilities Evaluated at Amortized Cost [Abstract]    
Financial Liabilities At Amortized Cost Securities Sold Under Repurchase Agreements 0 0
Financial Liabilities At Amortized Cost Securities Trading And Intermediation 0 0
Financial Liabilities At Amortized Cost, Financial Instruments Payable 0 0
Financial Liabilities At Amortized Cost Borrowings 0 0
Financial Liabilities At Amortized Cost Accounts Payables 0 0
Financial Liabilities At Amortized Cost Other Financial Liabilities 107,159 116,777
Evaluated at amortized cost 107,159 116,777
Level 3 of fair value hierarchy [member] | Securities Loaned [Domain]    
Financial liabilities at fair value through profit or loss [abstract]    
Financial Liabilities At Fair Value Through Profit Or Loss Securities Loaned 0 0
Level 3 of fair value hierarchy [member] | Corporate debt – local [Member]    
Financial liabilities at fair value through profit or loss [abstract]    
Financial Liabilities At Fair Value Through Profit Or Loss Securities Loaned 0 0
Level 3 of fair value hierarchy [member] | Swap contract [member]    
Financial liabilities at fair value through profit or loss [abstract]    
Derivative financial liabilities 0 0
Level 3 of fair value hierarchy [member] | Forward contract [member]    
Financial liabilities at fair value through profit or loss [abstract]    
Derivative financial liabilities 0 0
Level 3 of fair value hierarchy [member] | Futures contract [member]    
Financial liabilities at fair value through profit or loss [abstract]    
Derivative financial liabilities 0 0
Level 3 of fair value hierarchy [member] | Option contract [member]    
Financial liabilities at fair value through profit or loss [abstract]    
Derivative financial liabilities 0 0
Level 3 of fair value hierarchy [member] | Brazilian sovereign bonds [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 0 0
Financial assets at fair value through other comprehensive income [abstract]    
Investments in equity instruments designated at fair value through other comprehensive income 0 0
Level 3 of fair value hierarchy [member] | Foreign sovereign bonds    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 0  
Financial assets at fair value through other comprehensive income [abstract]    
Investments in equity instruments designated at fair value through other comprehensive income 0 0
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities 0  
Level 3 of fair value hierarchy [member] | Real estate–backed instruments [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 0 0
Level 3 of fair value hierarchy [member] | Agribusiness–backed instruments [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 0 0
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities 0 0
Level 3 of fair value hierarchy [member] | Corporate debt – local [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 0 0
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities 0 0
Level 3 of fair value hierarchy [member] | Corporate debt – foreign [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 0 0
Level 3 of fair value hierarchy [member] | Bank funding instruments (CDB) [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 0 0
Level 3 of fair value hierarchy [member] | Bank funding instruments (Others) [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 0 0
Level 3 of fair value hierarchy [member] | Structured notes [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 0 0
Level 3 of fair value hierarchy [member] | Investment funds [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 277,131 0
Level 3 of fair value hierarchy [member] | Equity securities [Member]    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 444,304 371,760
Level 3 of fair value hierarchy [member] | Others    
Financial assets at fair value through profit or loss [abstract]    
Financial assets at fair value through profit or loss, classified as held for trading 0 0
Level 3 of fair value hierarchy [member] | Swap contract [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial Assets at Fair Value Through Profit or Loss, Derivative Financial Instruments 0 0
Level 3 of fair value hierarchy [member] | Forward contract [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial Assets at Fair Value Through Profit or Loss, Derivative Financial Instruments 0 0
Level 3 of fair value hierarchy [member] | Futures contract [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial Assets at Fair Value Through Profit or Loss, Derivative Financial Instruments 0 0
Level 3 of fair value hierarchy [member] | Option contract [member]    
Financial assets at fair value through profit or loss [abstract]    
Financial Assets at Fair Value Through Profit or Loss, Derivative Financial Instruments 0 R$ 0
Level 3 of fair value hierarchy [member] | Brazilian sovereign bonds (onshore) [Member]    
Financial Assets Evaluated at Amortized Cost [Abstract]    
Financial Assets At Amortized Cost Securities R$ 0