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GOODWILL - Changes in Goodwill (Details) - BRL (R$)
R$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Changes in goodwill      
Goodwill at beginning of the year R$ 9,469,311 R$ 9,112,390 R$ 7,891,142
Foreign exchange effect 2,634,208 356,921 1,221,248
Impairment 0 0 0
Goodwill at end of the year 12,103,519 9,469,311 9,112,390
Gross      
Changes in goodwill      
Goodwill at beginning of the year 17,445,205 16,783,958 14,500,381
Foreign exchange effect 4,976,383 661,247 2,283,577
Goodwill at end of the year 22,421,588 17,445,205 16,783,958
Accumulated impairment losses      
Changes in goodwill      
Goodwill at beginning of the year (7,975,894) (7,671,568) (6,609,239)
Foreign exchange effect (2,342,175) (304,326) (1,062,329)
Goodwill at end of the year R$ (10,318,069) R$ (7,975,894) R$ (7,671,568)