XML 208 R201.htm IDEA: XBRL DOCUMENT v3.19.1
Equity and Remuneration to Shareholders - Summary of Dividends and Interest on Capital Payable (Detail) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of dividend [abstract]      
Beginning balance R$ 428    
Dividends and interest on equity 867 R$ 500 R$ 167
Withholding income tax on interest on capital (17)    
Dividends proposed for non-controlling shareholder. 127    
Proposed dividends of previous years (42)    
Expired dividends (8)    
Dividends retained - Minas Gerais state government (Note 12) (491)    
Ending balance R$ 864 R$ 428