Investments in associates and joint ventures (Details 3) - BRL (R$)
R$ in Thousands |
12 Months Ended |
Dec. 31, 2025 |
Dec. 31, 2024 |
| Notes and other explanatory information [abstract] |
|
|
| Jointly Controlled by Banco Santander - Total assets |
R$ 15,623,855
|
R$ 14,064,120
|
| Jointly Controlled by Banco Santander -Total liabilities |
15,303,124
|
13,920,211
|
| Total Income Jointly Controlled By Banco Santander |
322,033
|
212,081
|
| Banco RCI Brasil S.A. - Total assets |
14,406,307
|
12,806,942
|
| Banco RCI Brasil S.A. -Total liabilities |
14,060,196
|
12,663,035
|
| Total Income Banco RCI Brasil S.A |
346,111
|
239,839
|
| Estruturadora Brasileira de Projetos S.A. - EBP - Total assets |
3,889
|
1,784
|
| Estruturadora Brasileira de Projetos S.A. - EBP -Total liabilities |
3,876
|
1,783
|
| Total Income Estruturadora Brasileira De Projetos Sa Ebp |
369
|
1
|
| Gestora de Inteligencia de Credito - Total assets |
1,213,660
|
1,255,393
|
| Gestora de Inteligencia de Credito -Total liabilities |
1,239,052
|
1,255,393
|
| Total Income Gestora De Inteligncia De Crdito |
(24,447)
|
(27,759)
|
| Jointly Controlled by Santander Corretora de Seguros - Total assets |
3,169,143
|
3,003,077
|
| Jointly Controlled by Santander Corretora de Seguros -Total liabilities |
3,184,741
|
3,034,120
|
| Total Income Jointly Controlled by Santander Corretora de Seguros |
(45,238)
|
(31,043)
|
| Tecnologia Bancaria S.A. - TECBAN - Total assets |
2,836,231
|
2,752,924
|
| Tecnologia Bancaria S.A. - TECBAN -Total liabilities |
2,797,987
|
2,755,450
|
| Total Income Tecnologia Bancaria S.A. - TECBAN |
8,603
|
(2,526)
|
| Hyundai Corretora de Seguros Ltda. - Total assets |
11,069
|
7,152
|
| Hyundai Corretora de Seguros Ltda. -Total liabilities |
8,676
|
5,753
|
| Total Income Hyundai Corretora de Seguros Ltda |
2,393
|
1,399
|
| CSD Central de Servicos de Registro e Deposito aos Mercados Financeiro e de Capitais S.A -- Total assets |
279,750
|
211,773
|
| CSD Central de Servicos de Registro e Deposito aos Mercados Financeiro e de Capitais S.A -Total liabilities |
295,046
|
211,538
|
| Total Income CSD Central de Servicos de Registro e Deposito aos Mercados Financeiro e de Capitais S.A |
(15,295)
|
235
|
| BIOMAS Servicos Ambientais, Restauracao e Carbono S.A. -Total assets |
42,093
|
31,228
|
| BIOMAS Servicos Ambientais, Restauracao e Carbono S.A.-Total liabilities |
83,032
|
61,379
|
| Total Income BIOMAS Servicos Ambientais, Restauracao e Carbono S.A. |
(40,939)
|
(30,151)
|
| Significant Influence of Banco Santander - Total assets |
11,271,921
|
11,442,660
|
| Significant Influence of Banco Santander -Total liabilities |
9,932,267
|
10,558,737
|
| Total Income Significant Influence of Banco Santander |
1,260,785
|
883,923
|
| Nuclea S.A. - Total assets |
2,164,151
|
2,779,787
|
| Nuclea S.A. -Total liabilities |
1,524,528
|
2,212,634
|
| Total Income Nuclea S.A. |
633,822
|
567,153
|
| Pluxee Beneficios Brasil S.A. - Total assets |
8,419,988
|
|
| Pluxee Beneficios Brasil S.A. -Total liabilities |
7,792,935
|
|
| Total Income Pluxee Beneficios Brasil S.A. |
553,985
|
|
| Santander Auto S.A. - Total assets |
687,782
|
422,852
|
| Santander Auto S.A. -Total liabilities |
614,804
|
371,276
|
| Total Income Santander Auto Sa |
72,978
|
51,576
|
| Significant Influence of Corretora de Seguros -Total assets |
846,681
|
634,889
|
| Significant Influence of Corretora de Seguros -Total liabilities |
614,883
|
510,446
|
| Total Income Significant Influence of Corretora de Seguros |
226,950
|
124,443
|
| Webmotors S.A. - Total assets |
846,681
|
634,889
|
| Webmotors S.A. -Total liabilities |
614,883
|
510,446
|
| Total Income Webmotors Sa |
226,950
|
124,443
|
| Total assets |
30,911,600
|
29,144,746
|
| Total liabilities |
29,035,015
|
28,023,514
|
| Total Income |
R$ 1,764,530
|
R$ 1,189,405
|