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Financial assets and liabilities - Summary of Carrying Amount of Financial Assets (Detail) - BRL (R$)
R$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Disclosure of financial assets [line items]    
Financial assets R$ 29,914,865 R$ 28,842,050
Fair value through profit or loss [member]    
Disclosure of financial assets [line items]    
Financial assets 17,544,839 14,034,381
Fair value through profit or loss [member] | Cash and cash equivalents [member]    
Disclosure of financial assets [line items]    
Financial assets 8,103,713 2,155,446
Fair value through profit or loss [member] | Marketable securities [member]    
Disclosure of financial assets [line items]    
Financial assets 4,388,007 3,669,109
Fair value through profit or loss [member] | Other financial assets [member]    
Disclosure of financial assets [line items]    
Financial assets 320,193 69,126
Fair value through profit or loss [member] | Derivate financial instruments [member]    
Disclosure of financial assets [line items]    
Financial assets 4,732,926 8,140,700
Amortized cost    
Disclosure of financial assets [line items]    
Financial assets 12,370,026 14,807,669
Amortized cost | Cash and cash equivalents [member]    
Disclosure of financial assets [line items]    
Financial assets 8,070,417 11,487,472
Amortized cost | Trade receivables [member]    
Disclosure of financial assets [line items]    
Financial assets 2,745,853 2,033,441
Amortized cost | Restricted cash [member]    
Disclosure of financial assets [line items]    
Financial assets 58,990 34,562
Amortized cost | Receivables from related parties [member]    
Disclosure of financial assets [line items]    
Financial assets 416,491 929,690
Amortized cost | Sector financial assets [member]    
Disclosure of financial assets [line items]    
Financial assets 558,310 241,749
Amortized cost | Dividend receivable [member]    
Disclosure of financial assets [line items]    
Financial assets R$ 519,965 R$ 80,755