v3.26.1
Securities sold under repurchase agreements and interbank and institutional market funds - Schedule of Subordinated Debt, Including Perpetual Debts (Details) - BRL (R$)
R$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of detailed information about borrowings [line items]    
Subordinated liabilities R$ 48,147 R$ 45,224
Subordinated financial bills - BRL | Subordinated Financial Bills    
Disclosure of detailed information about borrowings [line items]    
Subordinated liabilities 37,900 25,541
Subordinated financial bills - BRL | 114% of SELIC | Subordinated Financial Bills | Perpetual    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 2,146  
Return p.a. 114.00%  
Subordinated liabilities R$ 1,320 1,294
Subordinated financial bills - BRL | SELIC + 1.17% to 1.19% | Subordinated Financial Bills | Perpetual    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) 935  
Subordinated liabilities R$ 1,064 1,033
Subordinated financial bills - BRL | SELIC + 1.17% to 1.19% | Subordinated Financial Bills | Perpetual | Minimum    
Disclosure of detailed information about borrowings [line items]    
Return p.a. 1.17%  
Subordinated financial bills - BRL | SELIC + 1.17% to 1.19% | Subordinated Financial Bills | Perpetual | Maximum    
Disclosure of detailed information about borrowings [line items]    
Return p.a. 1.19%  
Subordinated financial bills - BRL | CDI + 1.85% | Subordinated Financial Bills | 2029    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 450  
Return p.a. 1.85%  
Subordinated liabilities R$ 0 715
Subordinated financial bills - BRL | IPCA + 4.64% | Subordinated Financial Bills | 2030    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 106  
Return p.a. 4.64%  
Subordinated liabilities R$ 181 166
Subordinated financial bills - BRL | CDI + 2% | Subordinated Financial Bills | 2030    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 1,556  
Return p.a. 2.00%  
Subordinated liabilities R$ 0 2,486
Subordinated financial bills - BRL | CDI + 2% | Subordinated Financial Bills | 2031    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 5,488  
Return p.a. 2.00%  
Subordinated liabilities R$ 9,843 8,443
Subordinated financial bills - BRL | CDI + 2.4% | Subordinated Financial Bills | Perpetual    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 1,005  
Return p.a. 2.40%  
Subordinated liabilities R$ 1,035 1,027
Subordinated financial bills - BRL | 102% of CDI | Subordinated Financial Bills | 2034    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 1,161  
Return p.a. 102.00%  
Subordinated liabilities R$ 1,223 1,198
Subordinated financial bills - BRL | 102% of CDI | Subordinated Financial Bills | 2039    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 470  
Return p.a. 102.00%  
Subordinated liabilities R$ 488 481
Subordinated financial bills - BRL | CDI + 0.2% | Subordinated Financial Bills | 2034    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 108  
Return p.a. 0.20%  
Subordinated liabilities R$ 115 112
Subordinated financial bills - BRL | 10.63% | Subordinated Financial Bills | 2034    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 122  
Return p.a. 10.63%  
Subordinated liabilities R$ 127 126
Subordinated financial bills - BRL | CDI + 1.9% | Subordinated Financial Bills | Perpetual    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 700  
Return p.a. 1.90%  
Subordinated liabilities R$ 715 712
Subordinated financial bills - BRL | IPCA + 5.48% | Subordinated Financial Bills | 2034    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 107  
Return p.a. 5.48%  
Subordinated liabilities R$ 119 114
Subordinated financial bills - BRL | 100% of CDI | Subordinated Financial Bills | 2034    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 530  
Return p.a. 100.00%  
Subordinated liabilities R$ 550 541
Subordinated financial bills - BRL | CDI + 0.65% | Subordinated Financial Bills | 2034    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 3,100  
Return p.a. 0.65%  
Subordinated liabilities R$ 3,711 3,226
Subordinated financial bills - BRL | CDI + 0.9% | Subordinated Financial Bills | Perpetual    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 1,000  
Return p.a. 0.90%  
Subordinated liabilities R$ 1,018 1,033
Subordinated financial bills - BRL | CDI + 1.1% | Subordinated Financial Bills | Perpetual    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 2,830  
Return p.a. 1.10%  
Subordinated liabilities R$ 2,832 2,834
Subordinated financial bills - BRL | CDI + 1.25% | Subordinated Financial Bills | Perpetual    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 4,984  
Return p.a. 1.25%  
Subordinated liabilities R$ 5,449 0
Subordinated financial bills - BRL | CDI + 1.15% | Subordinated Financial Bills | Perpetual    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 3,000  
Return p.a. 1.15%  
Subordinated liabilities R$ 3,108 0
Subordinated financial bills - BRL | CDI + 1.35% | Subordinated Financial Bills | Perpetual    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 4,415  
Return p.a. 1.35%  
Subordinated liabilities R$ 5,002 0
Subordinated euronotes and bonds - USD | Subordinated Euronotes    
Disclosure of detailed information about borrowings [line items]    
Subordinated liabilities 2,755 12,230
Subordinated euronotes and bonds - USD | Subordinated Bonds    
Disclosure of detailed information about borrowings [line items]    
Subordinated liabilities 0 27
Subordinated euronotes and bonds - USD | 7.86% | Subordinated Euronotes | Perpetual    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 750  
Return p.a. 7.86%  
Subordinated liabilities R$ 0 4,746
Subordinated euronotes and bonds - USD | 7.56% | Subordinated Euronotes | Perpetual    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 700  
Return p.a. 7.56%  
Subordinated liabilities R$ 0 4,404
Subordinated euronotes and bonds - USD | 3.88% | Subordinated Euronotes | 2031    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 501  
Return p.a. 3.88%  
Subordinated liabilities R$ 2,755 3,080
Subordinated euronotes and bonds - USD | 8.90% | Subordinated Bonds | 2025    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 172  
Return p.a. 8.90%  
Subordinated liabilities R$ 0 22
Subordinated euronotes and bonds - USD | 7.18% | Subordinated Bonds | 2024    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 878  
Return p.a. 7.18%  
Subordinated liabilities R$ 0 5
Subordinated bonds - CLP | Subordinated Bonds    
Disclosure of detailed information about borrowings [line items]    
Subordinated liabilities 7,276 7,218
Subordinated bonds - CLP | 3.50% to 4.92% | Subordinated Bonds | 2033    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) 180,351  
Subordinated liabilities R$ 1,573 1,578
Subordinated bonds - CLP | 3.50% to 4.92% | Subordinated Bonds | 2033 | Minimum    
Disclosure of detailed information about borrowings [line items]    
Return p.a. 3.50%  
Subordinated bonds - CLP | 3.50% to 4.92% | Subordinated Bonds | 2033 | Maximum    
Disclosure of detailed information about borrowings [line items]    
Return p.a. 4.92%  
Subordinated bonds - CLP | 4.75% | Subordinated Bonds | 2035    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 97,962  
Return p.a. 4.75%  
Subordinated liabilities R$ 1,256 1,248
Subordinated bonds - CLP | 4.35% | Subordinated Bonds | 2032    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 1,060,250  
Return p.a. 4.35%  
Subordinated liabilities R$ 125 124
Subordinated bonds - CLP | 3.90% to 3.96% | Subordinated Bonds | 2035    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) 1,060,250  
Subordinated liabilities R$ 289 286
Subordinated bonds - CLP | 3.90% to 3.96% | Subordinated Bonds | 2035 | Minimum    
Disclosure of detailed information about borrowings [line items]    
Return p.a. 3.90%  
Subordinated bonds - CLP | 3.90% to 3.96% | Subordinated Bonds | 2035 | Maximum    
Disclosure of detailed information about borrowings [line items]    
Return p.a. 3.96%  
Subordinated bonds - CLP | 4.48% | Subordinated Bonds | 2036    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 1,060,250  
Return p.a. 4.48%  
Subordinated liabilities R$ 1,380 1,363
Subordinated bonds - CLP | 3.93% | Subordinated Bonds | 2038    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 1,060,250  
Return p.a. 3.93%  
Subordinated liabilities R$ 1,005 993
Subordinated bonds - CLP | 4.15% to 4.29% | Subordinated Bonds | 2040    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) 1,060,250  
Subordinated liabilities R$ 775 765
Subordinated bonds - CLP | 4.15% to 4.29% | Subordinated Bonds | 2040 | Minimum    
Disclosure of detailed information about borrowings [line items]    
Return p.a. 4.15%  
Subordinated bonds - CLP | 4.15% to 4.29% | Subordinated Bonds | 2040 | Maximum    
Disclosure of detailed information about borrowings [line items]    
Return p.a. 4.29%  
Subordinated bonds - CLP | 4.45% | Subordinated Bonds | 2042    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 1,060,250  
Return p.a. 4.45%  
Subordinated liabilities R$ 378 373
Subordinated bonds - CLP | 3.80% | Subordinated Bonds | 2034    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 57,168  
Return p.a. 3.80%  
Subordinated liabilities R$ 495 488
Subordinated bonds - COP | Subordinated Bonds    
Disclosure of detailed information about borrowings [line items]    
Subordinated liabilities 216 208
Subordinated bonds - COP | IPC + 2% | Subordinated Bonds | 2028    
Disclosure of detailed information about borrowings [line items]    
Principal amount (original currency) R$ 146,000  
Return p.a. 2.00%  
Subordinated liabilities R$ 216 R$ 208