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Investment in Associates and Joint Ventures (Summary of Condensed Financial Statements) (Details) - CAD ($)
$ in Millions
 12 Months Ended
Oct. 31, 2025
Oct. 31, 2024
Sep. 30, 2024
Assets      
Total assets $ 2,094,558 $ 2,061,751  
Liabilities      
Total liabilities 1,966,731 1,946,591  
Total net revenues 67,777 57,223  
Total other comprehensive income (loss) $ 4,987 $ 5,043  
Charles Schwab Corporation [Member]      
Assets      
Total assets     $ 630,363
Liabilities      
Total liabilities     566,502
Total net revenues     25,493
Total net income available to common stockholders     6,376
Total other comprehensive income (loss)     8,356
Total comprehensive income (loss)     $ 14,732