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Earnings per share (Tables)
12 Months Ended
Dec. 31, 2021
Text Block [Abstract]  
Summary of Earnings Per Share
Net income attributable to ITAÚ UNIBANCO HOLDING’s shareholders is divided by the average number of outstanding shares in the period, excluding treasury shares.
 
    
01/01 to
12/31/2021
    
01/01 to
12/31/2020
    
01/01 to
12/31/2019
 
Net income attributable to owners of the parent company
  
 
26,760
 
  
 
18,896
 
  
 
27,113
 
Minimum
non-cumulative
dividends on preferred shares
     (106      (106      (105
Retained earnings to be distributed to common equity owners in an amount per share equal to the minimum dividend payable to preferred equity owners
     (109      (109      (109
Retained earnings to be distributed, on a pro rata basis, to common and preferred equity owners:
                          
Common
     13,462        9,491        13,693  
Preferred
     13,083        9,190        13,206  
Total net income available to equity owners:
                          
Common
     13,571        9,600        13,802  
Preferred
     13,189        9,296        13,311  
Weighted average number of outstanding shares
                          
Common
     4,958,290,359        4,958,290,359        4,958,290,359  
Preferred
     4,818,741,579        4,801,324,161        4,781,855,588  
Basic earnings per share – R$
                          
Common
     2.74        1.94        2.78  
Preferred
     2.74        1.94        2.78  
b) Diluted earnings per share
Calculated similarly to the basic earnings per share; however, it includes the conversion of all preferred shares potentially dilutable in the denominator.
 
    
01/01 to
12/31/2021
    
01/01 to
12/31/2020
    
01/01 to
12/31/2019
 
Net income available to preferred equity owners
  
 
13,189
 
  
 
9,296
 
  
 
13,311
 
Dividends on preferred shares after dilution effects
     75        41        64  
Net income available to preferred equity owners considering preferred shares after the dilution effect
  
 
13,264
 
  
 
9,337
 
  
 
13,375
 
Net income available to ordinary equity owners
  
 
13,571
 
  
 
9,600
 
  
 
13,802
 
Dividend on preferred shares after dilution effects
     (75      (41      (64
Net income available to ordinary equity owners considering preferred shares after the dilution effect
  
 
13,496
 
  
 
9,559
 
  
 
13,738
 
Adjusted weighted average of shares
                          
Common
     4,958,290,359        4,958,290,359        4,958,290,359  
Preferred
  
 
4,873,042,114
 
  
 
4,843,233,835
 
  
 
4,826,925,107
 
Preferred
     4,818,741,579        4,801,324,161        4,781,855,588  
Incremental as per share-based payment plans
     54,300,535        41,909,674        45,069,519  
Diluted earnings per share – R$
                          
Common
     2.72        1.93        2.77  
Preferred
     2.72        1.93        2.77