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33. ADDITIONAL INFORMATION TO CASH FLOWS (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Additional Information To Cash Flows [Abstract]      
Income tax and social contribution paid R$ 542,877 R$ 1,167,419 R$ 336,962
Addition to PP&E with interest capitalization (notes 11 and 28) 92,506 117,189 71,611
Initial adoption IFRS16 - Right of use   640,989  
Remeasurement and addition - Right of use (note 11 a) 109,993 (151,558)  
Addition to PP&E without adding cash 30,345 278,213 10,792
Capitalization in subsidiaries without cash 104,809    
Addition to investment property without cash effect 61,597    
Net additional cash R$ 942,127 R$ 2,052,252 R$ 419,365