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Post-retirement benefits (Tables)
 12 Months Ended
Dec. 31, 2024
Text Block 1 [Abstract]  
Summary of Post Retirement Benefits
    
Note
     
12.31.2024
     
12.31.2023
  
Post-employment health care benefit plans in Brazil
      25.1.1        31.6        46.1  
Other post-employment benefit plans offered abroad
      (i )       2.8        1.9  
     
 
 
     
 
 
  
Post-retirement benefits
      
 
34.4
 
   
 
48.0
 
     
 
 
     
 
 
  
Summary of reconciliation
The following table shows a reconciliation from the opening balances to the closing balances:
 
    
12.31.2024
     
12.31.2023
  
Balance at beginning of year
   
 
46.1
 
   
 
34.2
 
Current service cost
      0.1        0.1  
Interest expense
      3.9        3.8  
Remeasurement losses (gains):
      
Experience loss
      1.2        3.9  
(Gain) loss due to change in financial assumptions
      (4.5 )       2.8  
Gain due to change in demographic assumptions
      (4.5 )       —   
Benefits paid
      (1.3 )       (1.7 ) 
Translation adjustments
      (9.4 )       3.0  
  
 
 
     
 
 
  
Balance at end of year
   
 
31.6
 
   
 
46.1
 
  
 
 
     
 
 
  
Summary of Retirement probability
    
12.31.2024
     
12.31.2023
  
Discount rate
      7.45% p.a.        5.47% p.a.  
Health care cost trend rate: medical inflation
      3% p.a.        5% p.a.  
Aging factor
      3% p.a.        3% p.a.  
Summary of the reasonably possible changes
As of December 31, 2024, reasonably possible changes (1%) in each of the actuarial assumptions described below, holding other assumptions constant, would have (increased) or reduced the defined benefit obligation as shown below:
 
    
Increase
     
Reduction
  
Effect on the discount rate
      3.6        (4.4 ) 
Effect on medical inflation
      (4.3 )       3.6