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Risks and Financial Instruments - Contractual undiscounted cash outflows (Detail) - BRL (R$)
R$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Summary of risks and financial instruments [line items]    
Leases payable R$ 1,588,673 R$ 46,066
Total [member]    
Summary of risks and financial instruments [line items]    
Loans including future contractual interest 17,224,800  
Currency and interest rate hedging instruments 588,400  
Trade payables 2,700,100  
Leases payable 2,043,800  
Less than 1 year [member]    
Summary of risks and financial instruments [line items]    
Loans including future contractual interest 1,532,000  
Currency and interest rate hedging instruments 131,100  
Trade payables 2,700,100  
Leases payable 310,000  
Between 1 and 3 years [member]    
Summary of risks and financial instruments [line items]    
Loans including future contractual interest 5,954,900  
Currency and interest rate hedging instruments 143,700  
Trade payables 0  
Leases payable 904,700  
Between 3 and 5 years [member]    
Summary of risks and financial instruments [line items]    
Loans including future contractual interest 4,686,300  
Currency and interest rate hedging instruments 129,300  
Trade payables 0  
Leases payable 508,700  
More than 5 years [member]    
Summary of risks and financial instruments [line items]    
Loans including future contractual interest 5,051,500  
Currency and interest rate hedging instruments 184,300  
Trade payables 0  
Leases payable R$ 320,400