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Investments in subsidiaries, joint ventures and associates - Summary of financial position and income of subsidiaries which have relevant non-controlling interests (Detail) - BRL (R$)
R$ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Financial position and income of subsidiaries which have relevant non-controlling interests      
Equity attributed to non-controlling participation R$ 523,331 R$ 466,227  
Income allocated to non-controlling participation for the year R$ 77,958 R$ 39,230 R$ 33,415
Iconic Lubrificantes S.A.      
Financial position and income of subsidiaries which have relevant non-controlling interests      
Proportion of interest in share capital and right votes detained by non-controlling participation 44.00% 44.00%  
Equity attributed to non-controlling participation R$ 477,710 R$ 446,707  
Income allocated to non-controlling participation for the year R$ 72,505 R$ 34,955  
Other investiments      
Financial position and income of subsidiaries which have relevant non-controlling interests      
Proportion of interest in share capital and right votes detained by non-controlling participation 0.00% 0.00%  
Equity attributed to non-controlling participation R$ 45,621 R$ 19,520  
Income allocated to non-controlling participation for the year R$ 5,453 R$ 4,275