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Recoverable taxes - Roll-forward of provision for loss (Details) - BRL (R$)
R$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Recoverable Taxes [Abstract]    
Opening Balance R$ 1,452,435 R$ 1,103,807
Increase in Provision for Impairment of Value Added Tax on Sales and Services Credits (316,741) (399,838)
Decrease In Provision For Impairment Of Value Added Tax On Sales And Services Credits Due To Recovery Of Credits 186,014 51,210
Provision For Impairment Of Value Added Tax On Sales And Services Credits, Write-Off 1,201
Closing Balance R$ 1,581,961 R$ 1,452,435