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Interest income and expense (Tables)
 3 Months Ended
Jan. 31, 2025
Text Block [Abstract]  
Summary of Consolidated Interest Income and Expense for Both Product and Accounting Category
The table below provides the consolidated interest income and expense by accounting category.
 
$ millions, for the three months ended
2025
Jan. 31
2024
Oct. 31
2024
Jan. 31
Interest
income
Interest
expense
Interest
income
Interest
expense
Interest
income
Interest
expense
Measured at amortized cost 
(1)(2)
  
$
10,679
 
$
8,270
  $ 11,225     $ 8,990     $ 11,056     $ 8,938  
Debt securities measured at FVOCI 
(1)
  
862
 
n/a
    961       n/a       867       n/a  
Other 
(3)
  
1,178
 
648
    1,045       608       811       547  
Total
  
$
  12,719
 
$
  8,918
  $   13,231     $   9,598     $   12,734     $   9,485  
(1)
Interest income for financial instruments that are measured at amortized cost and debt securities that are measured at FVOCI is calculated using the effective interest rate method.
(2)
Includes interest income on sublease-related assets and interest expense on lease liabilities under IFRS 16.
(3)
Includes interest income and expense and dividend income for financial instruments that are mandatorily measured and designated at FVTPL and equity securities designated at FVOCI.
n/a
Not applicable.