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Post-employment benefits
 3 Months Ended
Jan. 31, 2025
Text Block [Abstract]  
Post-employment benefits
Note 10. Post-employment benefits
The following tables provide details on the post-employment benefit expense recognized in the interim consolidated statement of income and on the remeasurements recognized in the interim consolidated statement of comprehensive income:
Defined benefit plan expense
 
$ millions, for the three months ended
2025
Jan. 31
2024
Oct. 31
2024
Jan. 31
2025
Jan. 31
2024
Oct. 31
2024
Jan. 31
Pension plans
Other
post-employment plans
Current service cost
  
$
57
  $ 48     $    48    
$
  1
  $ 2     $   1  
Net interest (income) expense
  
(20
)
 
     (16 )     (16 )   
5
    6       6  
Interest expense on effect of asset ceiling
  
1
    –       –    
–
    –       –  
Plan administration costs
  
2
    2       2    
–
    –       –  
Net defined benefit plan expense (income) recognized in net income
  
$
   40
  $    34   $ 34    
$
6
  $   8     $ 7  
Defined contribution plan expe
ns
e
$ millions, for the three months ended
2025
Jan. 31
2024
Oct. 31
2024
Jan. 31
Defined contribution pension plans
  
$
20
   $ 17      $ 22  
Government pension plans
(1)
  
56
     50        43  
Total defined contribution plan expense
  
$
  76
   $   67      $   65  
(1)
Includes Canada Pension Plan, Quebec Pension Plan, and U.S. Federal Insurance Contributions Act.
Remeasurement of employee defined benefit plans
(1)
$ millions, for the three months ended
2025
Jan. 31
2024
Oct. 31
2024
Jan. 31
2025
Jan. 31
2024
Oct. 31
2024
Jan. 31
Pension plans
Other
post-employment plans
Net actuarial gains (losses) on defined benefit obligations
$
(166
)
 
$
(5
) 
$
(699
) 
$
  (7
)
 
$
38
$
(35
) 
Net actuarial gains (losses) on plan assets
  
   199
    166          626    
–
    –       –  
Changes in asset ceiling excluding interest income
  
1
    (28 )
 
     (1 )   
–
    –       –  
Net remeasurement gains (losses) recognized in OCI
  
$
   34
  $   133     $ (74 )   
$
  (7
)
   $   38     $   (35 )
 
(1)
The Canadian post-employment defined benefit plans are remeasured on a quarterly basis for changes in the discount rate and for actual asset returns. All other Canadian plans’ actuarial assumptions and foreign plans’ actuarial assumptions are updated at least annually.