XML 151 R124.htm IDEA: XBRL DOCUMENT v3.19.1
Investment - Summary of Balances and Changes in Associates (Detail) - BRL (R$)
R$ in Thousands
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Summary of associates [line items]      
Associates, beginning R$ 25,341 R$ 22,731 R$ 21,537
Capital reduction (1,250)    
Dividends (1,220) (1,264) (948)
Share of profit (loss) of associates 1,467 3,874 2,142
Associates, ending 24,338 25,341 22,731
Transportadora sulbrasileira de gas [member]      
Summary of associates [line items]      
Associates, beginning 6,348 6,001 5,743
Capital reduction (1,250)    
Dividends (984) (865) (948)
Share of profit (loss) of associates 575 1,212 1,206
Associates, ending 4,689 6,348 6,001
Oxicap Industria de Gases [member]      
Summary of associates [line items]      
Associates, beginning 14,458 12,981 12,000
Share of profit (loss) of associates 908 1,477 981
Associates, ending 15,366 14,458 12,981
Quimica da bahia Industria e Comercio [member]      
Summary of associates [line items]      
Associates, beginning 3,618 3,678 3,684
Share of profit (loss) of associates (28) (60) (6)
Associates, ending 3,590 3,618 3,678
Metalurgica plus [member]      
Summary of associates [line items]      
Associates, beginning 340 71 110
Share of profit (loss) of associates (112) 269 (39)
Associates, ending 228 340 R$ 71
Plenogas distribuidora de gas [member]      
Summary of associates [line items]      
Associates, beginning 577    
Dividends (236) (399)  
Share of profit (loss) of associates 124 976  
Associates, ending R$ 465 R$ 577