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Risks and Financial Instruments - Assets and liabilities in foreign currencies (Detail) - BRL (R$)
R$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Assets in foreign currency abstract    
Cash, cash equivalents and financial investments in foreign currency (except hedging instruments) R$ 1,413,276 R$ 455,620
Foreign trade receivables, net of allowance for doubtful accounts and advances to foreign customers 307,829 213,544
Other assets 1,767,626 1,445,022
Assets in foreign currency 3,488,731 2,114,186
Liabilities in foreign currency    
Financing in foreign currency, gross of transaction costs and discount (9,246,707) (6,895,052)
Payables arising from imports, net of advances to foreign suppliers (633,013) (344,523)
Liabilities in foreign currency (9,879,720) (7,239,575)
Foreign currency hedging instruments 4,837,554 3,636,418
Net liability position – total (1,553,435) (1,488,971)
Net asset (liability) position – income statement effect 186,306 452,178
Net liability position – equity effect R$ (1,739,741) R$ (1,941,149)