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Summary of significant accounting policies - Additional information (Details) - BRL (R$)
 1 Months Ended 12 Months Ended
Aug. 31, 2022
Jan. 31, 2022
Jul. 31, 2021
Mar. 31, 2020
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Summary of Significant Accounting Policies [Line Items]              
Increased credit risk when contractual payments are past due         30 days    
Combined tax rate in Brazil         34.00% 34.00% 34.00%
Applicable surcharge tax rate         10.00%    
Monthly minimum income for surcharge         R$ 20,000    
Annual minimum income for surcharge         R$ 240,000    
Social contribution tax on net income   20.00%   20.00% 9.00%    
Loss carryforwards used to offset taxable profit         30.00%    
PIS tax rate         1.65%    
COFINS tax rate         7.60%    
Rate applicable to companies under PPM PIS         0.65%    
Rate applicable to companies under PPM COFINS         3.00%    
CSLL applied for banks regular level         2000.00%    
CSLL regular level applied for all other financials entities         1500.00%    
360 days              
Summary of Significant Accounting Policies [Line Items]              
Period for write-off of Loans and Receivables         360 days    
Stage 1              
Summary of Significant Accounting Policies [Line Items]              
Provision of Expected credit loss on financial assets         12 months    
Stage 2              
Summary of Significant Accounting Policies [Line Items]              
Provision of Expected credit loss on financial assets         30 days    
Stage 3              
Summary of Significant Accounting Policies [Line Items]              
Provision of Expected credit loss on financial assets         90 days    
Bottom of range              
Summary of Significant Accounting Policies [Line Items]              
Percentage of taxes reducing gross revenues         2.00%    
Top of range              
Summary of Significant Accounting Policies [Line Items]              
Percentage of taxes reducing gross revenues         5.00%    
Financial Institutions and Insurance Companies              
Summary of Significant Accounting Policies [Line Items]              
Social contribution tax on net income   15.00%     15.00%    
Rate applicable to companies under PPM PIS         1.00%    
Rate applicable to companies under PPM COFINS         4.00%    
Financial Institutions              
Summary of Significant Accounting Policies [Line Items]              
Social contribution tax on net income 21.00%   25.00%        
Social contribution tax on net income temporary increase 1.00%   5.00%        
Insurance Companies              
Summary of Significant Accounting Policies [Line Items]              
Social contribution tax on net income 16.00%   20.00%        
Federal Income Tax              
Summary of Significant Accounting Policies [Line Items]              
Combined tax rate in Brazil         15.00%