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TRADE ACCOUNTS RECEIVABLE - Summary (Details) - BRL (R$) R$ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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TRADE ACCOUNTS RECEIVABLE |  |
Trade accounts receivable - net | R$ 2,672,370 | R$ 3,201,656
Gross | Trade accounts receivable - in Brazil |  |
TRADE ACCOUNTS RECEIVABLE |  |
Trade accounts receivable - net | 1,193,971 | 1,056,625
Gross | Trade accounts receivable - exports from Brazil |  |
TRADE ACCOUNTS RECEIVABLE |  |
Trade accounts receivable - net | 117,274 | 373,593
Gross | Trade accounts receivable - outside of Brazil |  |
TRADE ACCOUNTS RECEIVABLE |  |
Trade accounts receivable - net | 1,459,204 | 1,929,595
Accumulated impairment losses |  |
TRADE ACCOUNTS RECEIVABLE |  |
Trade accounts receivable - net | R$ (98,079) | R$ (158,157)

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