v3.26.1
Risk and Capital Management - Schedule of Maturity Analysis of Estimated Undiscounted Future Cash Flows (Details) - BRL (R$)
R$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Insurance R$ (106) R$ 146
Private pension 321,690 279,220
Total 321,584 279,366
1 year    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Insurance (519) (159)
Private pension 12,001 13,469
Total 11,482 13,310
2 years    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Insurance (342) (295)
Private pension 12,553 13,538
Total 12,211 13,243
3 years    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Insurance (223) (194)
Private pension 12,926 12,380
Total 12,703 12,186
4 years    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Insurance (104) (91)
Private pension 13,177 12,219
Total 13,073 12,128
5 years    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Insurance 7 1
Private pension 13,281 12,178
Total 13,288 12,179
Over 5 years    
Disclosure of amounts to be recovered or settled after twelve months for classes of assets and liabilities that contain amounts to be recovered or settled both no more and more than twelve months after reporting date [line items]    
Insurance 1,075 884
Private pension 257,752 215,436
Total R$ 258,827 R$ 216,320