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Provisions and contingent liabilities - Breakdown of provisions by nature (Detail) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of other provisions [line items]        
Beginning balance R$ 1,040,172 R$ 932,185 R$ 898,045  
Additions 293,550 239,013 188,794  
Reversals (100,575) (87,807) (106,093)  
Payments (70,128) (84,939) (25,184)  
Interest 139,864 41,720 15,608  
Acquisition of subsidiary (i) [1] 1,247      
Reclassification to liabilities held for sale [2]     (38,985)  
Ending Balance 1,304,130 1,040,172 932,185  
Current 45,828 22,837 119,942 R$ 43,660
Non-current 1,258,302 1,017,335 812,243 R$ 854,385
IRPJ and CSLL [member]        
Disclosure of other provisions [line items]        
Beginning balance 559,217 552,172 547,862  
Additions 14,597 7,154 0  
Reversals (6,717) (36,683) (6,966)  
Payments 0 0 0  
Interest 69,070 36,574 11,276  
Acquisition of subsidiary (i) [1] 0      
Reclassification to liabilities held for sale [2]     0  
Ending Balance 636,167 559,217 552,172  
ICMS - State VAT [member]        
Disclosure of other provisions [line items]        
Beginning balance 68,434 84,155 108,568  
Additions 46,743 35,238 58,839  
Reversals (21,148) (14,907) (83,536)  
Payments (14,747) (38,097) 0  
Interest 27,101 2,045 284  
Acquisition of subsidiary (i) [1] 789      
Reclassification to liabilities held for sale [2]     0  
Ending Balance 107,172 68,434 84,155  
Civil, environmental and regulatory claims [member]        
Disclosure of other provisions [line items]        
Beginning balance 93,416 108,761 57,772  
Additions 124,857 18,326 87,066  
Reversals (29,402) (9,980) (9,702)  
Payments (39,071) (23,700) (8,116)  
Interest 0 9 724  
Acquisition of subsidiary (i) [1] 458      
Reclassification to liabilities held for sale [2]     (18,983)  
Ending Balance 150,258 93,416 108,761  
Labor [member]        
Disclosure of other provisions [line items]        
Beginning balance 73,172 95,460 90,675  
Additions 27,333 22,663 42,826  
Reversals (27,308) (22,387) (4,432)  
Payments (16,310) (23,142) (17,068)  
Interest 2,257 578 2,620  
Acquisition of subsidiary (i) [1] 0      
Reclassification to liabilities held for sale [2]     (19,161)  
Ending Balance 59,144 73,172 95,460  
Provision for indemnities [member]        
Disclosure of other provisions [line items]        
Beginning balance 150,820 0    
Additions 32,691 150,820    
Reversals (7,969) 0    
Payments 0 0    
Interest 28,238 0    
Acquisition of subsidiary (i) [1] 0      
Ending Balance 203,780 150,820 0  
Others [Member]        
Disclosure of other provisions [line items]        
Beginning balance 95,113 91,637 93,168  
Additions 47,329 4,812 63  
Reversals (8,031) (3,850) (1,457)  
Payments 0 0 0  
Interest 13,198 2,514 704  
Acquisition of subsidiary (i) [1] 0      
Reclassification to liabilities held for sale [2]     (841)  
Ending Balance R$ 147,609 R$ 95,113 R$ 91,637  
[1] For further information, see Note 28.
[2] For further information see Note 29.