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Risks and Financial Instruments - Summary of credit risk of financial institution and government of cash, cash equivalents and financial investments (Detail) - BRL (R$)
R$ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Disclosure of external credit grades [line items]    
Counterparty credit rating R$ 6,584,962 R$ 4,463,473
AAA [member]    
Disclosure of external credit grades [line items]    
Counterparty credit rating 5,720,996 3,606,000
AA [member]    
Disclosure of external credit grades [line items]    
Counterparty credit rating 809,583 740,879
A [member]    
Disclosure of external credit grades [line items]    
Counterparty credit rating 3,457 116,594
Others [member]    
Disclosure of external credit grades [line items]    
Counterparty credit rating [1] R$ 50,926 R$ 0
[1] Refers substantially to investiments with minoritary participation of UVC, which are classificated in long term financial investments.