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Stock option plan (Details 3 - Textuals 1)
R$ / shares in Units, R$ in Thousands
12 Months Ended
Dec. 31, 2021
BRL (R$)
R$ / shares
Dec. 31, 2020
BRL (R$)
Dec. 31, 2019
BRL (R$)
Oct. 29, 2021
R$ / shares
Share-based payments        
Equity settled share-based payments recognized in the statement of profit or loss | R$ R$ 967 R$ 142 R$ 0  
Equity-settled 1st and 2nd Program        
Share-based payments        
Percentage of options can be exercised before vesting period 25.00%      
Equity settled share-based payments recognized in the statement of profit or loss | R$ R$ 668 142    
Equity-settled 1st and 2nd Program | Top of range [member]        
Share-based payments        
Exercise price of the options       R$ 653.21
Equity-settled 1st and 2nd Program | Bottom of range [member]        
Share-based payments        
Exercise price of the options       9.58
Equity-settled 3rd Program        
Share-based payments        
Equity settled share-based payments recognized in the statement of profit or loss | R$ 251 0    
Equity-settled 3rd Program | Top of range [member]        
Share-based payments        
Exercise price of the options       1,352
Equity-settled 3rd Program | Bottom of range [member]        
Share-based payments        
Exercise price of the options       R$ 19.84
Equity-settled 4th Program        
Share-based payments        
Equity settled share-based payments recognized in the statement of profit or loss | R$ R$ 48 R$ 0    
Equity-settled 4th Program | Top of range [member]        
Share-based payments        
Exercise price of the options R$ 1,352      
Equity-settled 4th Program | Bottom of range [member]        
Share-based payments        
Exercise price of the options R$ 19.84      
CI&T Brazil        
Share-based payments        
Number of times for entity's share capital than subsidiary share capital 68.14      
Class A common shares        
Share-based payments        
Number of shares represented by each option 1