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General accounting policies - Summary of Initial Adoption of IFRS 9 (Detail) - BRL (R$)
R$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure Of Initial Adoption IFRS 9 [line items]      
Beginning balance R$ 12,950,024 R$ 13,627,220 R$ 14,992,025
Ending balance 14,675,960 12,950,024 13,627,220
Retained earnings      
Disclosure Of Initial Adoption IFRS 9 [line items]      
Beginning balance (423,203) 96,214 1,455,027
Ending balance 1,168,862 (423,203) 96,214
Total      
Disclosure Of Initial Adoption IFRS 9 [line items]      
Beginning balance 12,893,906 13,536,446 14,853,462
Ending balance 14,622,264 12,893,906 13,536,446
Non-controlling interests      
Disclosure Of Initial Adoption IFRS 9 [line items]      
Beginning balance 56,118 90,774 138,563
Ending balance R$ 53,696 R$ 56,118 R$ 90,774