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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, 2019
Dec. 31, 2018
Disclosure of quantitative information about right-of-use assets [line items]    
Adoption IFRS 16 R$ 1,363,803 R$ (46,066)
Write-offs (52,129)  
Effect of foreign currency exchange rate variation 88,796  
Right of use assets 1,980,912  
Right-of-use assets [member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Adoption IFRS 16 1,731,427  
Additions and remeasurement 402,864  
Write-offs (50,462)  
Transfer 111,822  
Effect of foreign currency exchange rate variation 85,319  
Amortization (300,058)  
Right of use assets 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 402,864  
Write-offs (57,586)  
Transfer 125,890  
Effect of foreign currency exchange rate variation 85,202  
Right of use assets 2,287,797  
Right-of-use assets [member] | Accumulated amortization [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Write-offs 7,124  
Transfer (14,068)  
Effect of foreign currency exchange rate variation 117  
Amortization (300,058)  
Right of use assets R$ (306,885)  
Right-of-use assets [member] | Real Estate [Member] | Cost [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Weighted average useful life 7 years  
Adoption IFRS 16 R$ 1,636,330  
Additions and remeasurement 308,622  
Write-offs (55,605)  
Transfer 98,043  
Effect of foreign currency exchange rate variation 80,930  
Right of use assets 2,068,320  
Right-of-use assets [member] | Real Estate [Member] | Accumulated amortization [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Write-offs 6,682  
Effect of foreign currency exchange rate variation 36  
Amortization (262,750)  
Right of use assets (256,032)  
Right-of-use assets [member] | Port Area [Member] | Cost [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Additions and remeasurement 68,007  
Right of use assets 68,007  
Right-of-use assets [member] | Port Area [Member] | Accumulated amortization [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Right of use assets R$ 0  
Right-of-use assets [member] | Other assets [member] | Cost [Member]    
Disclosure of quantitative information about right-of-use assets [line items]    
Weighted average useful life 4 years  
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 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 (37,308)  
Right of use assets R$ (50,853)