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Financial Instruments and Risk Management - Schedule Of Fair Value Of Derivative Hedge Instrument One (Details) - BRL (R$)
R$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Disclosure of financial liabilities [line items]    
Net liabilities exposed R$ (2,097) R$ (4,249)
Base scenario [member]    
Disclosure of financial liabilities [line items]    
Net liabilities exposed (2,097)  
Net liabilities exposed (2,097)  
Probable Scenario [Member]    
Disclosure of financial liabilities [line items]    
Net liabilities exposed (2,157)  
Net liabilities exposed (2,157)  
Net effect of exchange rate fluctuation (60)  
Adverse Scenario [Member]    
Disclosure of financial liabilities [line items]    
Net liabilities exposed (2,598)  
Net liabilities exposed (2,598)  
Net effect of exchange rate fluctuation (501)  
Loans and financings [member] | Base scenario [member]    
Disclosure of financial liabilities [line items]    
Net liabilities exposed (1,857)  
Loans and financings [member] | Probable Scenario [Member]    
Disclosure of financial liabilities [line items]    
Net liabilities exposed (1,910)  
Loans and financings [member] | Adverse Scenario [Member]    
Disclosure of financial liabilities [line items]    
Net liabilities exposed (2,301)  
Suppliers (itaipu binacional) [member] | Base scenario [member]    
Disclosure of financial liabilities [line items]    
Net liabilities exposed (240)  
Suppliers (itaipu binacional) [member] | Probable Scenario [Member]    
Disclosure of financial liabilities [line items]    
Net liabilities exposed (247)  
Suppliers (itaipu binacional) [member] | Adverse Scenario [Member]    
Disclosure of financial liabilities [line items]    
Net liabilities exposed R$ (297)