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16. INVESTMENTS (Details 9) - BRL (R$)
R$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Assets      
Cash and cash equivalents R$ 1,680 R$ 536 R$ 891
TOTAL CURRENT 15,456 10,354 [1] 27,796
TOTAL NON-CURRENT 38,627 40,172 [1] 32,059
Contract assets 4,980    
Liabilities      
TOTAL CURRENT 9,690 7,913 [1] 23,394
Total non-current liabilities 26,915 R$ 26,458 [1] R$ 20,522
Provisions 1,892    
At Fair Value [member]      
Assets      
Cash and cash equivalents 27    
Other current assets 2    
TOTAL CURRENT 29    
TOTAL NON-CURRENT 108    
Contract assets 108    
Liabilities      
Loans and financings 3    
Interest on equity and dividends payable 2    
Other current liabilities 1    
TOTAL CURRENT 6    
Total non-current liabilities 11    
Loans and financings 8    
Provisions 3    
Fair value of net identifiable assets R$ 120    
[1] See note 2.8.