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34. ASSETS AS HELD FOR SALE AND DISCONTINUED OPERATIONS (Details Narrative) - BRL (R$)
R$ / shares in Units, R$ in Millions
 12 Months Ended
Jul. 17, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Apr. 23, 2018
Disclosure of assets and liabilities classified as held for sale [line items]          
Number of shares sold (in shares)   1,258,841,654 1,458,752,601 1,258,841,654 199,910,947
Share price   R$ 5.00     R$ 5.00
Gain on disposal of assets   R$ 998 R$ 893  
Capital gain on assets   72      
Estimated costs for the sale   29      
Dividends declared   364      
Disposal of control   224      
Light [Member]          
Disclosure of assets and liabilities classified as held for sale [line items]          
Dividends declared   R$ 73      
Bottom Of Range [Member]          
Disclosure of assets and liabilities classified as held for sale [line items]          
Voting rights percentage   22.58%      
Top of Range [Member]          
Disclosure of assets and liabilities classified as held for sale [line items]          
Voting rights percentage   49.99%      
Initial Public Offering [Member]          
Disclosure of assets and liabilities classified as held for sale [line items]          
Number of shares sold (in shares) 33,333,333        
Proceeds from issuance of shares R$ 625        
Share price R$ 18.75