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The estimated fair value for certain consolidated long-term borrowings and financing was calculated at current market rates, considering the nature, term and risks similar to those of the registered contracts, as follows: (Details) - BRL (R$)
R$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
IfrsStatementLineItems [Line Items]    
Closing Balance R$ 45,660,484 R$ 42,940,059
Perpetual Bonds [Member] | Liquidity risk [member]    
IfrsStatementLineItems [Line Items]    
Closing Balance 5,203,773  
Fair value   5,157,465
Fixed Rate Notes [Member] | Liquidity risk [member]    
IfrsStatementLineItems [Line Items]    
Closing Balance 15,617,091 15,067,341
Fair value R$ 15,700,276 R$ 15,744,067