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INTANGIBLE - Goodwill and intangible assets with indefinite useful life (Details) - BRL (R$)
R$ in Thousands
Jun. 30, 2021
Dec. 31, 2020
Goodwill and intangible assets with indefinite useful life    
Goodwill and intangible assets with indefinite useful life R$ 8,017,579 R$ 8,017,579
Facepa    
Goodwill and intangible assets with indefinite useful life    
Goodwill and intangible assets with indefinite useful life 119,332 119,332
Fibria    
Goodwill and intangible assets with indefinite useful life    
Goodwill and intangible assets with indefinite useful life 7,897,051 7,897,051
Other    
Goodwill and intangible assets with indefinite useful life    
Goodwill and intangible assets with indefinite useful life R$ 1,196 R$ 1,196