FINANCIAL INSTRUMENTS - Measurement of fair value (Details) - BRL (R$) R$ in Thousands	Dec. 31, 2022	Dec. 31, 2021
FINANCIAL INSTRUMENTS
Total financial assets	R$ 9,451,689	R$ 9,297,041
Total financial liabilities	21,020,146	23,639,247
Debentures
FINANCIAL INSTRUMENTS
Total financial liabilities	1,427,773	2,929,907
Fair value of derivatives
FINANCIAL INSTRUMENTS
Total financial liabilities	19,056
Related parties
FINANCIAL INSTRUMENTS
Total financial liabilities	24,890	24,648
Other current liabilities
FINANCIAL INSTRUMENTS
Total financial liabilities	1,216,206	1,090,396
Other non-current liabilities
FINANCIAL INSTRUMENTS
Total financial liabilities	533,681	421,873
Short-term investments
FINANCIAL INSTRUMENTS
Total financial assets	2,959,135	2,626,212
Fair value of derivatives
FINANCIAL INSTRUMENTS
Total financial assets	3,272	3,246
Other current assets
FINANCIAL INSTRUMENTS
Total financial assets	789,901	679,193
Related parties
FINANCIAL INSTRUMENTS
Total financial assets		2,678
Other non-current assets
FINANCIAL INSTRUMENTS
Total financial assets	700,377	571,637
Recurring
FINANCIAL INSTRUMENTS
Total financial assets	4,452,685	3,882,966
Total financial liabilities	14,401,223	15,622,107
Recurring \| Short-term debt
FINANCIAL INSTRUMENTS
Current financial liabilities	2,492,262	234,537
Recurring \| Long-term debt
FINANCIAL INSTRUMENTS
Non-current financial liabilities	8,687,355	10,875,249
Recurring \| Debentures
FINANCIAL INSTRUMENTS
Current financial liabilities	628,886	1,531,956
Non-current financial liabilities	798,887	1,397,951
Recurring \| Fair value of derivatives
FINANCIAL INSTRUMENTS
Current financial liabilities	19,056
Recurring \| Related parties
FINANCIAL INSTRUMENTS
Non-current financial liabilities	24,890	24,648
Recurring \| Obligation with FIDC
FINANCIAL INSTRUMENTS
Current financial liabilities		45,497
Recurring \| Other current liabilities
FINANCIAL INSTRUMENTS
Current financial liabilities	1,216,206	1,090,396
Recurring \| Other non-current liabilities
FINANCIAL INSTRUMENTS
Non-current financial liabilities	533,681	421,873
Recurring \| Short-term investments
FINANCIAL INSTRUMENTS
Current financial assets	2,959,135	2,626,212
Recurring \| Fair value of derivatives
FINANCIAL INSTRUMENTS
Current financial assets	3,272	3,246
Recurring \| Other current assets
FINANCIAL INSTRUMENTS
Current financial assets	789,901	679,193
Recurring \| Related parties
FINANCIAL INSTRUMENTS
Non-current financial assets		2,678
Recurring \| Other non-current assets
FINANCIAL INSTRUMENTS
Non-current financial assets	700,377	571,637
Recurring \| Quoted Prices in Non-Active Markets for Similar Assets (Level 2)
FINANCIAL INSTRUMENTS
Total financial assets	4,452,685	3,882,966
Total financial liabilities	14,401,223	15,622,107
Recurring \| Quoted Prices in Non-Active Markets for Similar Assets (Level 2) \| Short-term debt
FINANCIAL INSTRUMENTS
Current financial liabilities	2,492,262	234,537
Recurring \| Quoted Prices in Non-Active Markets for Similar Assets (Level 2) \| Long-term debt
FINANCIAL INSTRUMENTS
Non-current financial liabilities	8,687,355	10,875,249
Recurring \| Quoted Prices in Non-Active Markets for Similar Assets (Level 2) \| Debentures
FINANCIAL INSTRUMENTS
Current financial liabilities	628,886	1,531,956
Non-current financial liabilities	798,887	1,397,951
Recurring \| Quoted Prices in Non-Active Markets for Similar Assets (Level 2) \| Fair value of derivatives
FINANCIAL INSTRUMENTS
Current financial liabilities	19,056
Recurring \| Quoted Prices in Non-Active Markets for Similar Assets (Level 2) \| Related parties
FINANCIAL INSTRUMENTS
Non-current financial liabilities	24,890	24,648
Recurring \| Quoted Prices in Non-Active Markets for Similar Assets (Level 2) \| Obligation with FIDC
FINANCIAL INSTRUMENTS
Current financial liabilities		45,497
Recurring \| Quoted Prices in Non-Active Markets for Similar Assets (Level 2) \| Other current liabilities
FINANCIAL INSTRUMENTS
Current financial liabilities	1,216,206	1,090,396
Recurring \| Quoted Prices in Non-Active Markets for Similar Assets (Level 2) \| Other non-current liabilities
FINANCIAL INSTRUMENTS
Non-current financial liabilities	533,681	421,873
Recurring \| Quoted Prices in Non-Active Markets for Similar Assets (Level 2) \| Short-term investments
FINANCIAL INSTRUMENTS
Current financial assets	2,959,135	2,626,212
Recurring \| Quoted Prices in Non-Active Markets for Similar Assets (Level 2) \| Fair value of derivatives
FINANCIAL INSTRUMENTS
Current financial assets	3,272	3,246
Recurring \| Quoted Prices in Non-Active Markets for Similar Assets (Level 2) \| Other current assets
FINANCIAL INSTRUMENTS
Current financial assets	789,901	679,193
Recurring \| Quoted Prices in Non-Active Markets for Similar Assets (Level 2) \| Related parties
FINANCIAL INSTRUMENTS
Non-current financial assets		2,678
Recurring \| Quoted Prices in Non-Active Markets for Similar Assets (Level 2) \| Other non-current assets
FINANCIAL INSTRUMENTS
Non-current financial assets	R$ 700,377	R$ 571,637

The amount of current financial assets. [Refer: Financial assets]

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The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities]

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The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Financial instruments, class [member]; Financial assets; Derivatives [member]]

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