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CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
NET INCOME FOR THE YEAR R$ 2,865 R$ 3,194 [1] R$ 1,764 [1]
Items not to be reclassified to profit or loss in subsequent periods      
Post retirement liabilities-remeasurement of obligations of the defined benefit plans (10)    
Income tax and social contribution tax on restatement of defined benefit plans 4    
Other (1)    
Equity gain (loss) on other comprehensive income in subsidiary and jointly-controlled entity (7)    
COMPREHENSIVE INCOME FOR THE YEAR 2,858    
Total of comprehensive income for the year attributed to:      
Equity holders of the parent 2,857    
Non - controlling interests 1    
COMPREHENSIVE INCOME FOR THE YEAR R$ 2,858    
Restated [member]      
NET INCOME FOR THE YEAR [2]   3,195 1,764
Items not to be reclassified to profit or loss in subsequent periods      
Post retirement liabilities-remeasurement of obligations of the defined benefit plans [2]   (1,599) (702)
Income tax and social contribution tax on restatement of defined benefit plans [2]   544 239
Equity gain (loss) on other comprehensive income in subsidiary and jointly-controlled entity [2]   (1,055) (463)
COMPREHENSIVE INCOME FOR THE YEAR [2]   2,140 1,301
Total of comprehensive income for the year attributed to:      
Equity holders of the parent [2]   2,139 1,259
Non - controlling interests [2]   1 42
COMPREHENSIVE INCOME FOR THE YEAR [2]   R$ 2,140 R$ 1,301
[1] See note 2.8.
[2] For further details of restatement of comparative balances, see Note 2.8