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Right to Use Assets and Leases payable - Summary of Information About Right of Use Assets (Detail) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Disclosure of quantitative information about right-of-use assets [line items]      
Adoption IFRS 16   R$ 1,363,803  
Write-offs R$ (35,381) (52,129)  
Effect of foreign currency exchange rate variation 12,007 88,796  
Right-of-use assets R$ 2,150,286 R$ 1,980,912  
Vehicles [member] | Cost [Member]      
Disclosure of quantitative information about right-of-use assets [line items]      
Weighted average useful life 8 years 7 years 6 years
Equipment [member] | Cost [Member]      
Disclosure of quantitative information about right-of-use assets [line items]      
Weighted average useful life 13 years 13 years 13 years
Right-of-use assets [member]      
Disclosure of quantitative information about right-of-use assets [line items]      
Adoption IFRS 16   R$ 1,731,427  
Additions and remeasurement R$ 523,220 402,864  
Write-offs (34,631) (50,462)  
Transfer   111,822  
Effect of foreign currency exchange rate variation 9,107 85,319  
Amortization (328,322) (300,058)  
Right-of-use assets 2,150,286 1,980,912  
Right-of-use assets [member] | Cost [Member]      
Disclosure of quantitative information about right-of-use assets [line items]      
Adoption IFRS 16   1,731,427  
Additions and remeasurement 523,220 402,864  
Write-offs (86,994) (57,586)  
Transfer   125,890  
Effect of foreign currency exchange rate variation 11,568 85,202  
Amortization 0 0  
Right-of-use assets 2,735,591 2,287,797  
Right-of-use assets [member] | Accumulated amortization [Member]      
Disclosure of quantitative information about right-of-use assets [line items]      
Write-offs 52,363 7,124  
Transfer   (14,068)  
Effect of foreign currency exchange rate variation (2,461) 117  
Amortization (328,322) (300,058)  
Right-of-use assets R$ (585,305) R$ (306,885)  
Right-of-use assets [member] | Real Estate [Member]      
Disclosure of quantitative information about right-of-use assets [line items]      
Weighted average useful life 10 years 7 years  
Right-of-use assets [member] | Real Estate [Member] | Cost [Member]      
Disclosure of quantitative information about right-of-use assets [line items]      
Adoption IFRS 16   R$ 1,636,330  
Additions and remeasurement R$ 259,244 308,622  
Write-offs (78,529) (55,605)  
Transfer   98,043  
Effect of foreign currency exchange rate variation 5,463 80,930  
Right-of-use assets 2,254,432    
Right-of-use assets [member] | Real Estate [Member] | Accumulated amortization [Member]      
Disclosure of quantitative information about right-of-use assets [line items]      
Write-offs 46,282 6,682  
Effect of foreign currency exchange rate variation (697) 36  
Amortization (271,130) (262,750)  
Right-of-use assets R$ (481,975) (256,430)  
Right-of-use assets [member] | Port Area [Member]      
Disclosure of quantitative information about right-of-use assets [line items]      
Weighted average useful life 20 years    
Right-of-use assets [member] | Port Area [Member] | Cost [Member]      
Disclosure of quantitative information about right-of-use assets [line items]      
Additions and remeasurement R$ 200,527 68,007  
Right-of-use assets 268,534 68,007  
Right-of-use assets [member] | Port Area [Member] | Accumulated amortization [Member]      
Disclosure of quantitative information about right-of-use assets [line items]      
Amortization (3,962)    
Right-of-use assets R$ (3,962) 0  
Right-of-use assets [member] | Vehicles [member]      
Disclosure of quantitative information about right-of-use assets [line items]      
Weighted average useful life 4 years    
Right-of-use assets [member] | Vehicles [member] | Cost [Member]      
Disclosure of quantitative information about right-of-use assets [line items]      
Additions and remeasurement R$ 55,616    
Write-offs (7,893)    
Effect of foreign currency exchange rate variation 252    
Right-of-use assets 139,843 91,868  
Right-of-use assets [member] | Vehicles [member] | Accumulated amortization [Member]      
Disclosure of quantitative information about right-of-use assets [line items]      
Write-offs 5,509    
Effect of foreign currency exchange rate variation 232    
Amortization (41,340)    
Right-of-use assets (63,091) (27,492)  
Right-of-use assets [member] | Equipment [member] | Cost [Member]      
Disclosure of quantitative information about right-of-use assets [line items]      
Additions and remeasurement 7,833    
Write-offs (572)    
Effect of foreign currency exchange rate variation 5,853    
Right-of-use assets 44,936 31,822  
Right-of-use assets [member] | Equipment [member] | Accumulated amortization [Member]      
Disclosure of quantitative information about right-of-use assets [line items]      
Write-offs 572    
Effect of foreign currency exchange rate variation (1,996)    
Amortization (10,595)    
Right-of-use assets R$ (19,619) R$ (7,600)  
Right-of-use assets [member] | Equipment [member]      
Disclosure of quantitative information about right-of-use assets [line items]      
Weighted average useful life 6 years    
Right-of-use assets [member] | Other assets [member]      
Disclosure of quantitative information about right-of-use assets [line items]      
Weighted average useful life 20 years 4 years  
Right-of-use assets [member] | Other assets [member] | Cost [Member]      
Disclosure of quantitative information about right-of-use assets [line items]      
Adoption IFRS 16   R$ 95,097  
Additions and remeasurement   26,235  
Write-offs   (1,981)  
Transfer   27,847  
Effect of foreign currency exchange rate variation   4,272  
Right-of-use assets R$ 27,846 151,470  
Right-of-use assets [member] | Other assets [member] | Accumulated amortization [Member]      
Disclosure of quantitative information about right-of-use assets [line items]      
Write-offs   442  
Transfer   (14,068)  
Effect of foreign currency exchange rate variation   81  
Amortization (1,295) (37,308)  
Right-of-use assets R$ (16,658) R$ (15,363)