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Expected Credit Losses on Financial Assets and Reconciliation of carrying amount (Details) - BRL (R$)
R$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period R$ 321,697,974  
Financial assets at end of period 365,169,005 R$ 321,697,974
Stage 1    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 111,971,384  
Financial Assets, Acquisitions (Settlements) During Period (5,192,952)  
Increase (Decrease) Through Transfers From Stage 1 To Stage 2 Financial Assets (1,822,720)  
Stage 1 to Stage 3 (625,233)  
Stage 2 to Stage 1 1,741,332  
Stage 3 To Stage 1 3,174  
Decrease through write-off, financial assets 0  
Financial assets at end of period 106,074,985 111,971,384
Stage 2    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 3,304,461 2,786,201
Financial Assets, Acquisitions (Settlements) During Period (729,825) (889,100)
Increase (Decrease) Through Transfers From Stage 1 To Stage 2 Financial Assets 1,822,720 2,409,392
Stage 2 to Stage 1 (1,741,332) (877,225)
Stage 2 to Stage 3 (155,532) (125,622)
Stage 3 to Stage 2 460 815
Decrease through write-off, financial assets 0 0
Financial assets at end of period 2,500,952 3,304,461
Stage 3    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 406,769 237,130
Financial Assets, Acquisitions (Settlements) During Period (135,400) (80,484)
Stage 1 to Stage 3 625,233 309,919
Stage 3 To Stage 1 (3,174) (254)
Stage 2 to Stage 3 155,532 125,622
Stage 3 to Stage 2 (460) (815)
Decrease through write-off, financial assets (264,955) (184,349)
Financial assets at end of period 783,545 406,769
Consolidated Stages    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 115,682,614  
Financial Assets, Acquisitions (Settlements) During Period (6,058,177)  
Decrease through write-off, financial assets 264,955  
Financial assets at end of period 109,359,482 115,682,614
Stage 1    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 111,971,384 100,218,376
Financial Assets, Acquisitions (Settlements) During Period   13,594,840
Increase (Decrease) Through Transfers From Stage 1 To Stage 2 Financial Assets   (2,409,392)
Stage 1 to Stage 3   (309,919)
Stage 2 to Stage 1   877,225
Stage 3 To Stage 1   254
Decrease through write-off, financial assets   0
Financial assets at end of period   111,971,384
Consolidted stages [Member]    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 115,682,614 103,241,707
Financial Assets, Acquisitions (Settlements) During Period   12,625,256
Decrease through write-off, financial assets   (184,349)
Financial assets at end of period   115,682,614
On-balance exposures [Member] | Stage 1    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 104,497,807  
Financial Assets, Acquisitions (Settlements) During Period (5,486,504)  
Increase (Decrease) Through Transfers From Stage 1 To Stage 2 Financial Assets (1,304,043)  
Stage 1 to Stage 3 (612,775)  
Stage 2 to Stage 1 1,603,609  
Stage 3 To Stage 1 3,171  
Decrease through write-off, financial assets 0  
Financial assets at end of period 98,701,265 104,497,807
On-balance exposures [Member] | Stage 2    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 2,910,045 2,202,931
Financial Assets, Acquisitions (Settlements) During Period (585,008) (566,369)
Increase (Decrease) Through Transfers From Stage 1 To Stage 2 Financial Assets 1,304,043 2,108,966
Stage 2 to Stage 1 (1,603,609) (710,801)
Stage 2 to Stage 3 (154,591) (125,492)
Stage 3 to Stage 2 458 810
Decrease through write-off, financial assets 0 0
Financial assets at end of period 1,871,338 2,910,045
On-balance exposures [Member] | Stage 3    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 401,211 231,590
Financial Assets, Acquisitions (Settlements) During Period (129,631) (80,172)
Stage 1 to Stage 3 612,775 309,713
Stage 3 To Stage 1 (3,171) (253)
Stage 2 to Stage 3 154,591 125,492
Stage 3 to Stage 2 (458) (810)
Decrease through write-off, financial assets 264,955 184,349
Financial assets at end of period 770,362 401,211
On-balance exposures [Member] | Consolidated Stages    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 107,809,063  
Financial Assets, Acquisitions (Settlements) During Period (6,201,143)  
Decrease through write-off, financial assets 264,955  
Financial assets at end of period 101,342,965 107,809,063
On-balance exposures [Member] | Stage 1    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 104,497,807 91,894,479
Financial Assets, Acquisitions (Settlements) During Period   14,310,953
Increase (Decrease) Through Transfers From Stage 1 To Stage 2 Financial Assets   (2,108,966)
Stage 1 to Stage 3   (309,713)
Stage 2 to Stage 1   710,801
Stage 3 To Stage 1   253
Decrease through write-off, financial assets   0
Financial assets at end of period   104,497,807
On-balance exposures [Member] | Consolidted stages [Member]    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 107,809,063 94,329,000
Financial Assets, Acquisitions (Settlements) During Period   13,664,412
Decrease through write-off, financial assets   184,349
Financial assets at end of period   107,809,063
Financial assets at fair value through other comprehensive income, category [member] | Securities [Member] | Stage 1    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 53,250,910  
Financial Assets, Acquisitions (Settlements) During Period (11,027,561)  
Increase (Decrease) Through Transfers From Stage 1 To Stage 2 Financial Assets 0  
Stage 1 to Stage 3 0  
Stage 2 to Stage 1 0  
Stage 3 To Stage 1 0  
Decrease through write-off, financial assets 0  
Financial assets at end of period 42,223,349 53,250,910
Financial assets at fair value through other comprehensive income, category [member] | Securities [Member] | Consolidated Stages    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 53,250,910  
Financial Assets, Acquisitions (Settlements) During Period (11,027,561)  
Decrease through write-off, financial assets 0  
Financial assets at end of period 42,223,349 53,250,910
Financial assets at fair value through other comprehensive income, category [member] | Securities [Member] | Stage 1    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 53,250,910 43,693,837
Financial Assets, Acquisitions (Settlements) During Period   9,557,073
Increase (Decrease) Through Transfers From Stage 1 To Stage 2 Financial Assets   0
Stage 1 to Stage 3   0
Stage 2 to Stage 1   0
Stage 3 To Stage 1   0
Decrease through write-off, financial assets   0
Financial assets at end of period   53,250,910
Financial assets at fair value through other comprehensive income, category [member] | Securities [Member] | Consolidted stages [Member]    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 53,250,910 43,693,837
Financial Assets, Acquisitions (Settlements) During Period   9,557,073
Decrease through write-off, financial assets   0
Financial assets at end of period   53,250,910
Financial assets at amortised cost, category [member] | Securities [Member] | Stage 1    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 2,850,108  
Financial Assets, Acquisitions (Settlements) During Period 4,585,816  
Increase (Decrease) Through Transfers From Stage 1 To Stage 2 Financial Assets (1,103)  
Stage 1 to Stage 3 (74,197)  
Stage 2 to Stage 1 0  
Stage 3 To Stage 1 0  
Decrease through write-off, financial assets 0  
Financial assets at end of period 7,360,624 2,850,108
Financial assets at amortised cost, category [member] | Securities [Member] | Stage 2    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 0  
Financial Assets, Acquisitions (Settlements) During Period 0  
Increase (Decrease) Through Transfers From Stage 1 To Stage 2 Financial Assets 1,103  
Stage 2 to Stage 1 0  
Stage 2 to Stage 3 0  
Stage 3 to Stage 2 0  
Decrease through write-off, financial assets 0  
Financial assets at end of period 1,103 0
Financial assets at amortised cost, category [member] | Securities [Member] | Stage 3    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 0  
Financial Assets, Acquisitions (Settlements) During Period 0  
Stage 1 to Stage 3 74,197  
Stage 3 To Stage 1 0  
Stage 2 to Stage 3 0  
Stage 3 to Stage 2 0  
Decrease through write-off, financial assets 0  
Financial assets at end of period 74,197 0
Financial assets at amortised cost, category [member] | Securities [Member] | Consolidated Stages    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 2,850,108  
Financial Assets, Acquisitions (Settlements) During Period 4,585,816  
Decrease through write-off, financial assets 0  
Financial assets at end of period 7,435,924 2,850,108
Financial assets at amortised cost, category [member] | Securities [Member] | Stage 1    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 2,850,108 6,861,493
Financial Assets, Acquisitions (Settlements) During Period   (4,011,385)
Increase (Decrease) Through Transfers From Stage 1 To Stage 2 Financial Assets   0
Stage 1 to Stage 3   0
Stage 2 to Stage 1   0
Stage 3 To Stage 1   0
Decrease through write-off, financial assets   0
Financial assets at end of period   2,850,108
Financial assets at amortised cost, category [member] | Securities [Member] | Consolidted stages [Member]    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 2,850,108 6,861,493
Financial Assets, Acquisitions (Settlements) During Period   (4,011,385)
Decrease through write-off, financial assets   0
Financial assets at end of period   2,850,108
Financial assets at amortised cost, category [member] | Securities purchased under agreements to sell [Member] | Stage 1    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 22,059,501  
Financial Assets, Acquisitions (Settlements) During Period (4,993,837)  
Increase (Decrease) Through Transfers From Stage 1 To Stage 2 Financial Assets 0  
Stage 1 to Stage 3 0  
Stage 2 to Stage 1 0  
Stage 3 To Stage 1 0  
Decrease through write-off, financial assets 0  
Financial assets at end of period 17,065,664 22,059,501
Financial assets at amortised cost, category [member] | Securities purchased under agreements to sell [Member] | Stage 3    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 0  
Financial Assets, Acquisitions (Settlements) During Period 0  
Stage 1 to Stage 3 0  
Stage 3 To Stage 1 0  
Stage 2 to Stage 3 0  
Stage 3 to Stage 2 0  
Decrease through write-off, financial assets 0  
Financial assets at end of period 0 0
Financial assets at amortised cost, category [member] | Securities purchased under agreements to sell [Member] | Consolidated Stages    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 22,059,501  
Financial Assets, Acquisitions (Settlements) During Period (4,993,837)  
Decrease through write-off, financial assets 0  
Financial assets at end of period 17,065,664 22,059,501
Financial assets at amortised cost, category [member] | Securities purchased under agreements to sell [Member] | Stage 1    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 22,059,501 14,891,781
Financial Assets, Acquisitions (Settlements) During Period   7,167,720
Increase (Decrease) Through Transfers From Stage 1 To Stage 2 Financial Assets   0
Stage 1 to Stage 3   0
Stage 2 to Stage 1   0
Stage 3 To Stage 1   0
Decrease through write-off, financial assets   0
Financial assets at end of period   22,059,501
Financial assets at amortised cost, category [member] | Securities purchased under agreements to sell [Member] | Consolidted stages [Member]    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 22,059,501 14,891,781
Financial Assets, Acquisitions (Settlements) During Period   7,167,720
Decrease through write-off, financial assets   0
Financial assets at end of period   22,059,501
Financial assets at amortised cost, category [member] | Loans and credit card operations [Member] | Stage 1    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 26,337,288  
Financial Assets, Acquisitions (Settlements) During Period 5,949,078  
Increase (Decrease) Through Transfers From Stage 1 To Stage 2 Financial Assets (1,302,940)  
Stage 1 to Stage 3 (538,578)  
Stage 2 to Stage 1 1,603,609  
Stage 3 To Stage 1 3,171  
Decrease through write-off, financial assets 0  
Financial assets at end of period 32,051,628 26,337,288
Financial assets at amortised cost, category [member] | Loans and credit card operations [Member] | Stage 2    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 2,910,045 2,202,931
Financial Assets, Acquisitions (Settlements) During Period (585,008) (566,369)
Increase (Decrease) Through Transfers From Stage 1 To Stage 2 Financial Assets 1,302,940 2,108,966
Stage 2 to Stage 1 (1,603,609) (710,801)
Stage 2 to Stage 3 (154,591) (125,492)
Stage 3 to Stage 2 458 810
Decrease through write-off, financial assets 0 0
Financial assets at end of period 1,870,235 2,910,045
Financial assets at amortised cost, category [member] | Loans and credit card operations [Member] | Stage 3    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 401,211 231,590
Financial Assets, Acquisitions (Settlements) During Period (129,631) (80,172)
Stage 1 to Stage 3 538,578 309,713
Stage 3 To Stage 1 (3,171) (253)
Stage 2 to Stage 3 154,591 125,492
Stage 3 to Stage 2 (458) (810)
Decrease through write-off, financial assets 264,955 184,349
Financial assets at end of period 696,165 401,211
Financial assets at amortised cost, category [member] | Loans and credit card operations [Member] | Consolidated Stages    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 29,648,544  
Financial Assets, Acquisitions (Settlements) During Period 5,234,439  
Decrease through write-off, financial assets 264,955  
Financial assets at end of period 34,618,028 29,648,544
Financial assets at amortised cost, category [member] | Loans and credit card operations [Member] | Stage 1    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 26,337,288 26,447,368
Financial Assets, Acquisitions (Settlements) During Period   1,597,545
Increase (Decrease) Through Transfers From Stage 1 To Stage 2 Financial Assets   (2,108,966)
Stage 1 to Stage 3   (309,713)
Stage 2 to Stage 1   710,801
Stage 3 To Stage 1   253
Decrease through write-off, financial assets   0
Financial assets at end of period   26,337,288
Financial assets at amortised cost, category [member] | Loans and credit card operations [Member] | Consolidted stages [Member]    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 29,648,544 28,881,889
Financial Assets, Acquisitions (Settlements) During Period   951,004
Decrease through write-off, financial assets   184,349
Financial assets at end of period   29,648,544
Off-Balance Exposures [Member] | Stage 1    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 7,473,577  
Financial Assets, Acquisitions (Settlements) During Period 293,552  
Increase (Decrease) Through Transfers From Stage 1 To Stage 2 Financial Assets (518,677)  
Stage 1 to Stage 3 (12,458)  
Stage 2 to Stage 1 137,723  
Stage 3 To Stage 1 3  
Decrease through write-off, financial assets 0  
Financial assets at end of period 7,373,720 7,473,577
Off-Balance Exposures [Member] | Stage 2    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 394,416 583,270
Financial Assets, Acquisitions (Settlements) During Period (144,817) (322,731)
Increase (Decrease) Through Transfers From Stage 1 To Stage 2 Financial Assets 518,677 300,426
Stage 2 to Stage 1 (137,723) (166,424)
Stage 2 to Stage 3 (941) (130)
Stage 3 to Stage 2 2 5
Decrease through write-off, financial assets 0 0
Financial assets at end of period 629,614 394,416
Off-Balance Exposures [Member] | Stage 3    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 5,558 5,540
Financial Assets, Acquisitions (Settlements) During Period (5,769) (312)
Stage 1 to Stage 3 12,458 206
Stage 3 To Stage 1 (3) (1)
Stage 2 to Stage 3 941 130
Stage 3 to Stage 2 (2) (5)
Decrease through write-off, financial assets 0 0
Financial assets at end of period 13,183 5,558
Off-Balance Exposures [Member] | Consolidated Stages    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 7,873,551  
Financial Assets, Acquisitions (Settlements) During Period 142,966  
Decrease through write-off, financial assets 0  
Financial assets at end of period 8,016,517 7,873,551
Off-Balance Exposures [Member] | Stage 1    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period 7,473,577 8,323,897
Financial Assets, Acquisitions (Settlements) During Period   (716,113)
Increase (Decrease) Through Transfers From Stage 1 To Stage 2 Financial Assets   (300,426)
Stage 1 to Stage 3   (206)
Stage 2 to Stage 1   166,424
Stage 3 To Stage 1   1
Decrease through write-off, financial assets   0
Financial assets at end of period   7,473,577
Off-Balance Exposures [Member] | Consolidted stages [Member]    
Disclosure of financial assets that are either past due or impaired [line items]    
Financial assets at beginning of period R$ 7,873,551 8,912,707
Financial Assets, Acquisitions (Settlements) During Period   (1,039,156)
Decrease through write-off, financial assets   0
Financial assets at end of period   R$ 7,873,551