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Gain (loss) on disposal of PP&E and intangibles and impairment - Additional information (Detail) - BRL (R$)
R$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Loss on disposal of property plant and equipment and intangibles details narrative abstract [Abstract]      
Gain (loss) on disposal of property, plant, and equipment R$ 76,150 R$ (30,019) R$ (22,088)
Goodwill impairment loss   R$ 593,280