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GOODWILL - Changes in Goodwill (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Changes in goodwill      
Goodwill at beginning of the year R$ 12,103,519 R$ 9,469,311 R$ 9,112,390
Foreign exchange effect 873,906 2,634,208 356,921
Results in operations with subsidiary and joint ventures (note 3,4) (549,898)    
Goodwill at end of the year 12,427,527 12,103,519 9,469,311
Gross cost      
Changes in goodwill      
Goodwill at beginning of the year 22,421,588 17,445,205 16,783,958
Foreign exchange effect 1,469,190 4,976,383 661,247
Results in operations with subsidiary and joint ventures (note 3,4) (549,898)    
Goodwill at end of the year 23,340,880 22,421,588 17,445,205
Accumulated impairment losses      
Changes in goodwill      
Goodwill at beginning of the year (10,318,069) (7,975,894) (7,671,568)
Foreign exchange effect (595,284) (2,342,175) (304,326)
Goodwill at end of the year R$ (10,913,353) R$ (10,318,069) R$ (7,975,894)