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Share-based compensation plan - Restricted shares plan (Details) - Restricted share units
 6 Months Ended
Jun. 30, 2025
shares
shares
Dec. 31, 2024
BRL (R$)
shares
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Number of other equity instruments outstanding in share-based payment arrangement 3,076,116 2,980,111
Shares granted 563,980  
Restricted stock, year two 504,946  
Restricted stock, year three 431,331  
Restricted stock, year four 230,773  
Restricted Stock, Year Five 1,672,574  
Restricted Stock, Year Six 236,492  
Grant Year 2022    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Fair value on grant date | R$   R$ 53.81
Number of other equity instruments outstanding in share-based payment arrangement 115,800
Shares granted 3,758  
Grant Year 2023    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Fair value on grant date | R$   R$ 51.41
Number of other equity instruments outstanding in share-based payment arrangement 396,016 383,568
Shares granted 12,448  
Restricted stock, year two 277,249  
Restricted stock, year three 118,767  
Grant Year 2024    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Fair value on grant date | R$   R$ 55.77
Number of other equity instruments outstanding in share-based payment arrangement 2,212,835 2,480,743
Shares granted 80,509  
Restricted stock, year two 227,697  
Restricted stock, year three 312,564  
Restricted Stock, Year Five 1,672,574  
Grant Year 2025    
Disclosure of terms and conditions of share-based payment arrangement [line items]    
Fair value on grant date | R$   R$ 61.39
Number of other equity instruments outstanding in share-based payment arrangement 467,265
Shares granted 467,265  
Restricted stock, year two  
Restricted stock, year three  
Restricted stock, year four 230,773  
Restricted Stock, Year Five  
Restricted Stock, Year Six 236,492