XML 216 R188.htm IDEA: XBRL DOCUMENT v3.21.1
Risks and Financial Instruments - Summary of Credit Risk of Cash, Cash Equivalents and Financial Investments (Detail) - BRL (R$)
R$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Disclosure of external credit grades [line items]    
Counterparty credit rating R$ 8,672,160 R$ 5,712,097
AAA [member]    
Disclosure of external credit grades [line items]    
Counterparty credit rating 8,190,428 4,906,077
AA [member]    
Disclosure of external credit grades [line items]    
Counterparty credit rating 317,894 331,512
A [member]    
Disclosure of external credit grades [line items]    
Counterparty credit rating 163,839 418,020
BBB [member]    
Disclosure of external credit grades [line items]    
Counterparty credit rating R$ 56,488