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Earnings per share (Tables)
 9 Months Ended
Jul. 31, 2022
Text Block [Abstract]  
Summary of Earnings Per Share
 
  
  
For the three months ended
 
  
For the nine months ended
 
($ millions)
  
July 31
2022
 
  
April 30
2022
 
  
July 31
2021
 
  
July 31
2022
 
  
July 31
2021
 
Basic earnings per common share
  
  
  
  
  
Net income attributable to common shareholders
   
$
2,504
 
    $   2,595      $   2,426     
$
   7,707
 
    $   6,980  
Weighted average number of common shares outstanding
(millions)
   
 
1,195
 
      1,199        1,215     
 
1,201
 
      1,213  
Basic earnings per common share
(1)
(in dollars)
   
$
2.10
 
    $ 2.16      $ 2.00     
$
6.41
 
    $ 5.75  
Diluted earnings per common share
                                             
Net income attributable to common shareholders
   
$
2,504
 
    $ 2,595      $ 2,426     
$
7,707
 
    $ 6,980  
Dilutive impact of share-based payment options and others
(2)
   
 
6
 
      –        9     
 
91
 
      41  
Net income attributable to common shareholders (diluted)
   
$
2,510
 
    $ 2,595      $ 2,435     
$
7,798
 
    $ 7,021  
Weighted average number of common shares outstanding
(millions)
   
 
1,195
 
      1,199        1,215     
 
1,201
 
      1,213  
Dilutive impact of share-based payment options and others
(2)
(millions)
   
 
8
 
      2        8     
 
20
 
      12  
Weighted average number of diluted common shares outstanding
(millions)
   
 
1,203
 
      1,201        1,223     
 
1,221
 
      1,225  
Diluted earnings per common share
(1)
(in dollars)
   
$
2.09
 
    $ 2.16      $ 1.99     
$
6.39
 
    $ 5.73  
  (1)
Earnings per share calculations are based on full dollar and share amounts.
  (2)
Certain options as well as acquisition-related put/call options that the Bank may settle at its own discretion by issuing common shares were not included in the calculation of diluted earnings per share as they were anti-dilutive.