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FINANCIAL INSTRUMENTS AND RISKS - Transactions Protected by Derivative Financial Instruments (Details) - BRL (R$)
R$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Total cost exposure [member]    
IfrsStatementLineItems [Line Items]    
Notional R$ 19,853.3 R$ 18,911.7
Fair Value Assets 271.8 597.4
Fair Value Liability (719.4) (421.1)
Gain (loss) Finance Result (3,075.2) (2,113.5)
Gain (loss) Operational Result 452.7 1,710.2
Gain (loss) Equity 134.3 2,277.4
Commodities risk portion of cost exposure [member]    
IfrsStatementLineItems [Line Items]    
Notional 4,809.9 3,179.9
Fair Value Assets 100.8 455.3
Fair Value Liability (376.0) (41.2)
Gain (loss) Finance Result 63.5 (126.8)
Gain (loss) Operational Result (32.3) 1,168.1
Gain (loss) Equity (475.0) 684.7
US Dollars risk portion of cost exposure [member]    
IfrsStatementLineItems [Line Items]    
Notional 14,874.7 15,516.2
Fair Value Assets 157.7 136.2
Fair Value Liability (342.9) (378.4)
Gain (loss) Finance Result (3,139.2) (1,970.7)
Gain (loss) Operational Result 477.1 541.8
Gain (loss) Equity 596.6 1,792.7
Euros risk portion of cost exposure [member]    
IfrsStatementLineItems [Line Items]    
Notional 32.2 31.8
Fair Value Assets 1.9
Fair Value Liability (0.8)
Gain (loss) Finance Result (0.7) (0.1)
Gain (loss) Operational Result (0.3) 0.5
Gain (loss) Equity 1.2 (1.9)
Mexican Pesos risk portion of cost exposure [member]    
IfrsStatementLineItems [Line Items]    
Notional 136.5 183.8
Fair Value Assets 11.4 5.9
Fair Value Liability (0.5) (0.7)
Gain (loss) Finance Result 1.2 (15.9)
Gain (loss) Operational Result 8.2 (0.2)
Gain (loss) Equity 11.5 (198.1)
Total fixed asset exposure [member]    
IfrsStatementLineItems [Line Items]    
Notional 226.8 1,111.4
Fair Value Assets 1.5 1.1
Fair Value Liability (5.4) (53.3)
Gain (loss) Finance Result (5.9) (368.8)
Gain (loss) Operational Result 4.9 105.3
Gain (loss) Equity (13.0) 103.2
US Dollars risk portion of fixed assets exposure [member]    
IfrsStatementLineItems [Line Items]    
Notional 226.8 1,111.4
Fair Value Assets 1.5 1.1
Fair Value Liability (5.4) (53.3)
Gain (loss) Finance Result (5.9) (368.8)
Gain (loss) Operational Result 4.9 105.3
Gain (loss) Equity (13.0) 103.2
Total expenses exposure [member]    
IfrsStatementLineItems [Line Items]    
Notional 204.9 365.8
Fair Value Assets 0.5 0.5
Fair Value Liability (4.6) (18.1)
Gain (loss) Finance Result (42.5) (124.5)
Gain (loss) Operational Result 9.1 36.9
Gain (loss) Equity (14.8) 192.9
US Dollars risk portion of the expenses exposure [member]    
IfrsStatementLineItems [Line Items]    
Notional 204.9 365.8
Fair Value Assets 0.5 0.5
Fair Value Liability (4.6) (18.1)
Gain (loss) Finance Result (42.5) (124.5)
Gain (loss) Operational Result 9.1 36.9
Gain (loss) Equity (14.8) 192.9
Cash U [Member]    
IfrsStatementLineItems [Line Items]    
Gain (loss) Finance Result (17.1)  
U S Dollars Cash [Member]    
IfrsStatementLineItems [Line Items]    
Gain (loss) Finance Result (17.1)  
Total financial risk exposure [member]    
IfrsStatementLineItems [Line Items]    
Notional 20,285.0 20,388.9
Fair Value Assets 273.8 599.0
Fair Value Liability (729.4) (492.5)
Gain (loss) Finance Result (3,140.7) (2,528.8)
Gain (loss) Operational Result 466.7 1,852.4
Gain (loss) Equity R$ 106.5 2,573.5
Total equity exposure [member]    
IfrsStatementLineItems [Line Items]    
Gain (loss) Finance Result   78.0
Stock exchange prices risk portion of equity exposure [member]    
IfrsStatementLineItems [Line Items]    
Gain (loss) Finance Result   R$ 78.0