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Income tax - Additional information (Details) - BRL (R$)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Major components of tax expense (income) [abstract]      
Unused tax losses for which no deferred tax asset recognised R$ 5,338 R$ 12,705  
Applicable tax rate 34.00% 34.00% 34.00%