XML 221 R214.htm IDEA: XBRL DOCUMENT v3.19.1
Operating Costs And Expenses - Summary of Outsourced Services (Detail) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Disclosure of detailed information of outsourced services [abstract]      
Meter reading and bill delivery R$ 129 R$ 142 R$ 140
Communication 80 66 55
Maintenance and conservation of electrical facilities and equipment 323 266 246
Building conservation and cleaning 110 108 97
Contracted labor 21 15 13
Freight and airfares 7 8 7
Accommodation and meals 12 13 13
Security services 20 23 25
Consultant 16 16 15
Maintenance and conservation of furniture and utensils 4 4 4
Information technology 59 62 49
Maintenance and conservation of vehicles 2 2 8
Disconnection and reconnection 62 35 7
Environmental services 14 11 19
Legal services 25 22 26
Legal procedural costs 2 3 4
Tree pruning 28 21 14
Cleaning of power line pathways 41 16 8
Copying and legal publications 21 23 16
Inspection of customer units 10 1 1
Printing of tax invoices and energy bills   3 3
Other expenses 101 114 97
Outsourced services R$ 1,087 R$ 974 R$ 867