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FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT - Sensitivity analysis - foreign exchange rate exposure (Details) R$ in Thousands	6 Months Ended
	Jun. 30, 2022 BRL (R$) item
Probable
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Closing foreign exchange rate (R$ to U.S.$) | item	5.2380
Possible (+25%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Closing foreign exchange rate (R$ to U.S.$) | item	6.5475
Remote (+50%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Closing foreign exchange rate (R$ to U.S.$) | item	7.8570
Possible (-25%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Closing foreign exchange rate (R$ to U.S.$) | item	3.9285
Remote (-50%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Closing foreign exchange rate (R$ to U.S.$) | item	2.6190
Currency Risk
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Closing foreign exchange rate (R$ to U.S.$) | item	5.2380
Currency Risk | Cash and cash equivalents | Probable
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial assets attributable to an increase in measurement input	R$ 7,459,784
Currency Risk | Cash and cash equivalents | Possible (+25%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial assets attributable to an increase in measurement input	1,864,946
Currency Risk | Cash and cash equivalents | Remote (+50%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial assets attributable to an increase in measurement input	3,729,892
Currency Risk | Marketable securities | Probable
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial assets attributable to an increase in measurement input	7,949,880
Currency Risk | Marketable securities | Possible (+25%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial assets attributable to an increase in measurement input	1,987,470
Currency Risk | Marketable securities | Remote (+50%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial assets attributable to an increase in measurement input	3,974,941
Currency Risk | Trade accounts receivable | Probable
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial assets attributable to an increase in measurement input	4,363,152
Currency Risk | Trade accounts receivable | Possible (+25%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial assets attributable to an increase in measurement input	1,090,788
Currency Risk | Trade accounts receivable | Remote (+50%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial assets attributable to an increase in measurement input	2,181,576
Currency Risk | Trade accounts payable | Probable
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial liabilities attributable to an increase in measurement input	(849,543)
Currency Risk | Trade accounts payable | Possible (+25%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial liabilities attributable to an increase in measurement input	(212,386)
Currency Risk | Trade accounts payable | Remote (+50%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial liabilities attributable to an increase in measurement input	(424,772)
Currency Risk | Loans and financing | Probable
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial liabilities attributable to an increase in measurement input	(61,974,010)
Currency Risk | Loans and financing | Possible (+25%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial liabilities attributable to an increase in measurement input	(15,493,503)
Currency Risk | Loans and financing | Remote (+50%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial liabilities attributable to an increase in measurement input	(30,987,005)
Currency Risk | Liabilities for asset acquisition and associates | Probable
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial liabilities attributable to an increase in measurement input	(2,028,019)
Currency Risk | Liabilities for asset acquisition and associates | Possible (+25%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial liabilities attributable to an increase in measurement input	(507,005)
Currency Risk | Liabilities for asset acquisition and associates | Remote (+50%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial liabilities attributable to an increase in measurement input	(1,014,010)
Currency Risk | Derivative options | Probable
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial instruments attributable to an increase in measurement input	894,576
Currency Risk | Derivative options | Possible (+25%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial instruments attributable to an increase in measurement input	(3,586,796)
Currency Risk | Derivative options | Remote (+50%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial instruments attributable to an increase in measurement input	(8,259,453)
Currency Risk | Derivative options | Possible (-25%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial instruments attributable to a decrease in measurement input	4,729,741
Currency Risk | Derivative options | Remote (-50%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial instruments attributable to a decrease in measurement input	10,207,242
Currency Risk | Derivative swaps | Probable
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial instruments attributable to an increase in measurement input	(2,880,213)
Currency Risk | Derivative swaps | Possible (+25%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial instruments attributable to an increase in measurement input	(3,313,087)
Currency Risk | Derivative swaps | Remote (+50%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial instruments attributable to an increase in measurement input	(6,626,174)
Currency Risk | Derivative swaps | Possible (-25%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial instruments attributable to a decrease in measurement input	3,313,088
Currency Risk | Derivative swaps | Remote (-50%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial instruments attributable to a decrease in measurement input	6,626,175
Currency Risk | Derivatives Non Deliverable Forward ("NDF") | Probable
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial instruments attributable to an increase in measurement input	(54,800)
Currency Risk | Derivatives Non Deliverable Forward ("NDF") | Possible (+25%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial instruments attributable to an increase in measurement input	(308,040)
Currency Risk | Derivatives Non Deliverable Forward ("NDF") | Remote (+50%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial instruments attributable to an increase in measurement input	(616,080)
Currency Risk | Derivatives Non Deliverable Forward ("NDF") | Possible (-25%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial instruments attributable to a decrease in measurement input	308,040
Currency Risk | Derivatives Non Deliverable Forward ("NDF") | Remote (-50%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial instruments attributable to a decrease in measurement input	616,081
Currency Risk | Embedded derivative | Probable
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial instruments attributable to an increase in measurement input	(24,033)
Currency Risk | Embedded derivative | Possible (+25%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial instruments attributable to an increase in measurement input	(75,903)
Currency Risk | Embedded derivative | Remote (+50%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial instruments attributable to an increase in measurement input	(151,805)
Currency Risk | Embedded derivative | Possible (-25%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial instruments attributable to a decrease in measurement input	75,902
Currency Risk | Embedded derivative | Remote (-50%)
FINANCIAL INSTRUMENTS AND RISKS MANAGEMENT
Effect on profit or loss and equity due to changes in fair value of financial instruments attributable to a decrease in measurement input	R$ 151,805

X

- Definition

The spot exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Spot exchange rate is the exchange rate for immediate delivery.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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