v3.24.1.1.u2
Equity (Summary of Classes of Share Capital - Common Shares) (Details) - CAD ($)
shares in Millions, $ in Millions
 3 Months Ended 6 Months Ended
Apr. 30, 2024
Apr. 30, 2023
Apr. 30, 2024
Apr. 30, 2023
Disclosure of classes of share capital [line items]        
Balance at beginning of period     $ 112,071  
Balance at end of period $ 111,982   $ 111,982  
Common shares [member] | Issued capital [member]        
Disclosure of classes of share capital [line items]        
Balance at beginning of period (shares) 1,772.8 1,830.0 1,791.4 1,821.7
Balance at beginning of period $ 25,318 $ 25,094 $ 25,434 $ 24,363
Proceeds from shares issued on exercise of stock options, Number of shares 0.4 0.7 1.0 1.1
Proceeds from shares issued on exercise of stock options, Amount $ 24 $ 45 $ 66 $ 71
Shares issued as a result of dividend reinvestment plan, Number of shares 1.6 8.9 3.3 16.8
Shares issued as a result of dividend reinvestment plan $ 132 $ 713 $ 269 $ 1,418
Purchase of shares for cancellation and other, Number of Shares (15.2) 0.0 (36.1) 0.0
Purchase of shares for cancellation and other, Amount $ (217) $ 0 $ (512) $ 0
Balance at end of period (shares) 1,759.6 1,839.6 1,759.6 1,839.6
Balance at end of period $ 25,257 $ 25,852 $ 25,257 $ 25,852