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Investments in associates and joint ventures (Details 1) - BRL (R$) R$ in Thousands | Dec. 31, 2025 | Dec. 31, 2024
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Notes and other explanatory information [abstract] |  |
Jointly Controlled by Banco Santander | R$ 534,505 | R$ 644,426
Banco RCI Brasil S.A. | 485,793 | 591,951
Estruturadora Brasileira de Projetos S.A. - EBP | 428 | 387
Gestora de Inteligência de Crédito | 48,284 | 52,088
Jointly Controlled by Santander Corretora de Seguros | 3,492 | 2,307
Hyundai Corretora de Seguros | 3,492 | 2,307
Significant Influence of Banco Santander | 2,370,206 | 2,422,571
Núclea S.A. | 314,434 | 306,521
Pluxee Benefícios Brasil S.A. (3) | 1,933,758 | 2,059,643
Santander Auto S.A. | 56,745 | 56,407
FIDC Creditórios Multisegmentos NPL Ipanema X Responsabilidade Limitada | 65,269 |
Significant Influence of Santander Corretora de Seguros | 608,891 | 570,872
Tecnologia Bancária S.A. - TECBAN (1) | 250,552 | 248,951
CSD Central de Serviços de Registro e Depósito aos Mercados Financeiro e de Capitais S.A | 47,321 | 41,027
BIOMAS – Serviços Ambientais, Restauração e Carbono S.A. | 3,946 | 2,923
Webmotors S.A. | 307,072 | 277,971
Total | R$ 3,517,094 | R$ 3,640,176

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