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PROVISION FOR JUDICIAL LIABILITIES - Rollforward of provisions for probably losses, net of judicial deposits (Details) - BRL (R$)
R$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Disclosure of other provisions [line items]    
Judicial deposits R$ (196,916) R$ (174,324)
Provision 3,452,871 3,686,801
Provision, net 3,255,955 3,512,477
Taxes and social security    
Disclosure of other provisions [line items]    
Judicial deposits (135,641) (124,133)
Provision 2,984,230 3,176,503
Provision, net 2,848,589 3,052,370
Labor    
Disclosure of other provisions [line items]    
Judicial deposits (57,780) (50,464)
Provision 217,180 227,139
Provision, net 159,400 176,675
Civil and environment    
Disclosure of other provisions [line items]    
Judicial deposits (3,495) 273
Provision 251,461 283,159
Provision, net R$ 247,966 R$ 283,432