XML 112 R105.htm IDEA: XBRL DOCUMENT v3.19.1
Recoverable Taxes - Summary of Recoverable Taxes (Detail) - BRL (R$)
R$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Disclosure of Recoverable Taxes [Line Items]    
Recoverable taxes, current R$ 124 R$ 174
Recoverable taxes, non-current 242 231
Recoverable taxes 366 405
ICMS (VAT) [member]    
Disclosure of Recoverable Taxes [Line Items]    
Recoverable taxes, current 80 71
Recoverable taxes, non-current 240 225
PIS and Pasep taxes [member]    
Disclosure of Recoverable Taxes [Line Items]    
Recoverable taxes, current 4 12
Recoverable taxes, non-current   1
Cofins [member]    
Disclosure of Recoverable Taxes [Line Items]    
Recoverable taxes, current 21 56
Recoverable taxes, non-current   3
Other [member]    
Disclosure of Recoverable Taxes [Line Items]    
Recoverable taxes, current 19 35
Recoverable taxes, non-current R$ 2 R$ 2