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32. RELATED PARTY TRANSACTIONS (Details 3) - Related parties [Member] - Number
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Disclosure of transactions between related parties [line items]    
Number Of Investments 8
Light [Member]    
Disclosure of transactions between related parties [line items]    
Type   Promissory Note
Annual contractual conditions   CDI + 3.50%
Maturity   Jan. 22, 2019
Number Of Investments 3
ETAU [Member]    
Disclosure of transactions between related parties [line items]    
Type   Debentures
Annual contractual conditions   108.00% of CDI
Maturity   Dec. 01, 2019
Number Of Investments   5