XML 86 R72.htm IDEA: XBRL DOCUMENT v3.25.1
Share capital - Schedule of Common Shares Issued (Detail)
$ in Millions
 3 Months Ended 6 Months Ended
Apr. 30, 2025
CAD ($)
Shares
shares
Jan. 31, 2025
CAD ($)
shares
Apr. 30, 2024
CAD ($)
Shares
shares
Apr. 30, 2025
CAD ($)
Shares
shares
Apr. 30, 2024
CAD ($)
Shares
shares
Disclosure of classes of share capital [line items]          
Balance at beginning of period   $ 59,007   $ 59,007  
Balance at end of period $ 61,946   $ 55,656 $ 61,946 $ 55,656
Common shares [member]          
Disclosure of classes of share capital [line items]          
Beginning balance, Number of shares | shares 940,081,255 942,294,598 937,223,345 942,294,598 931,098,941
Equity-settled share-based compensation plans, Number of shares | Shares 143,000   313,852 1,404,526 692,877
Shareholder investment plan, Number of shares | shares     4,693,884 629 9,811,613
Employee share purchase plan, Number of shares | shares     786,615   1,457,807
Number of shares issued, Number of shares | shares 940,224,255   943,017,696 943,699,753 943,061,238
Purchase of common shares for cancellation, Number of shares | shares (6,000,000)     (9,500,000)  
Treasury shares, Number of shares | shares 5,934   (15,277) 30,436 (58,819)
Ending balance, Number of shares | shares 934,230,189 940,081,255 943,002,419 934,230,189 943,002,419
Balance at beginning of period $ 17,027 $ 17,011 $ 16,447 $ 17,011 $ 16,082
Equity-settled share-based compensation plans 9   17 86 37
Shareholder investment plan, Amount     299   607
Employee share purchase plan, Amount     51   90
Number of shares issued, Amount 17,036   16,814 17,097 16,816
Purchase of common shares for cancellation, Amount (109)     (172)  
Treasury shares, Amount 2   (1) 4 (3)
Balance at end of period $ 16,929 $ 17,027 $ 16,813 $ 16,929 $ 16,813