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31 Net Operating Revenue (Details 3)
R$ in Thousands
Dec. 31, 2020
BRL (R$)
Disclosure of net operating revenue [line items]  
Facilities sharing R$ 26,512
Less than one year [member]  
Disclosure of net operating revenue [line items]  
Facilities sharing 1,410
1 to 5 Years [member]  
Disclosure of net operating revenue [line items]  
Facilities sharing 5,640
Over 5 Years [member]  
Disclosure of net operating revenue [line items]  
Facilities sharing R$ 19,462