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TAX CREDITS - Current and Non-current (Details) - BRL (R$)
R$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Disclosure of Tax credits    
Tax credits - current R$ 527,428 R$ 402,429
Tax credits - non-current 32,065 30,841
Tax credits    
Disclosure of Tax credits    
Tax credits - current 527,428 402,429
Tax credits - non-current 32,065 30,841
Tax credits - current and non-current 559,493 433,270
ICMS (state VAT)    
Disclosure of Tax credits    
Tax credits - current 291,027 155,096
Tax credits - non-current 27,527 26,135
Social security financing    
Disclosure of Tax credits    
Tax credits - current 95,700 91,229
Tax credits - non-current 1,980 360
Financing of social integration program    
Disclosure of Tax credits    
Tax credits - current 23,473 20,242
IPI (federal VAT)    
Disclosure of Tax credits    
Tax credits - current 44,312 59,982
IVA (Value-added tax)    
Disclosure of Tax credits    
Tax credits - current 32,967 48,139
Others    
Disclosure of Tax credits    
Tax credits - current 39,949 27,741
Financing of social integration program and others    
Disclosure of Tax credits    
Tax credits - non-current R$ 2,558 R$ 4,346