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Provision for Contingencies - Legal and Administrative proceedings (Details)
R$ in Thousands
Dec. 31, 2018
BRL (R$)
claim
Dec. 31, 2017
BRL (R$)
Dec. 31, 2016
BRL (R$)
Change in provisions for contingencies      
Provision for inflation-adjusted principal R$ 4,398    
Judicial deposits 129,005 R$ 113,613  
Contingencies 1,206,341 1,064,884 R$ 233,899
Tax and social security      
Change in provisions for contingencies      
Judicial deposits 44,395 69,599  
Contingencies 1,077,761 1,026,950 193,922
Contingency due to tax deficiency notice 1,077,761    
Provision on tax contingency due to tax deficiency notice 0    
Tax assessment notices of PIS and COFINS R$ 848,428    
Labor      
Change in provisions for contingencies      
Number of claims | claim 3,459    
Judicial deposits R$ 79,605 44,014  
Contingencies R$ 85,309 14,268 38,667
Civil      
Change in provisions for contingencies      
Number of claims | claim 453    
Judicial deposits R$ 5,005    
Contingencies R$ 43,271 R$ 23,666 R$ 1,310