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6 INVENTORIES (Tables) | 12 Months Ended
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Dec. 31, 2019
Inventories [Abstract] |
Schedule of inventory |
| Consolidated
| 12/31/2019 |  | 12/31/2018
Finished goods | 1,691,842 |  | 1,501,969
Work in progress | 1,294,369 |  | 1,217,611
Raw materials | 1,493,129 |  | 1,584,140
Spare parts | 902,135 |  | 857,402
Advances to suppliers | 35,828 |  | 36,192
(-) Provision for losses | (134,553) |  | (157,754)
| 5,282,750 |  | 5,039,560
Schedule of provision for inventory losses | The movements in the provision for inventory losses are as follows:
| Consolidated
| 12/31/2019 |  | 12/31/2018
Opening balance | (157,754) |  | (135,840)
(Estimated losses) / Reversal of inventories with low turnover and obsolescence | 23,201 |  | (21,914)
Closing balance | (134,553) |  | (157,754)

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