v3.26.1
Loans, Impaired Loans, and Allowance for Credit Losses (Summary of Macroeconomic Variables impacted in Determining ECLs) (Details)
 9 Months Ended
Jul. 31, 2026
$ / shares
Base Forecast [Member] | Average Q3 2026 - Q2 2027 [Member]  
Disclosure of detailed information about financial instruments [line items]  
U.S. 10-year treasury yield 4.20%
U.S. 10-year BBB spread 1.53%
Exchange rate (U.S. dollar/Canadian dollar) 0.74
Base Forecast [Member] | Average Q3 2026 - Q2 2027 [Member] | Canada [member]  
Disclosure of detailed information about financial instruments [line items]  
Unemployment rate 6.40%
Real GDP 1.40%
Home prices 1.10%
Central bank policy interest rate 2.25%
Base Forecast [Member] | Average Q3 2026 - Q2 2027 [Member] | United States [member]  
Disclosure of detailed information about financial instruments [line items]  
Unemployment rate 4.20%
Real GDP 2.10%
Home prices 1.30%
Central bank policy interest rate 3.56%
Base Forecast [Member] | Remaining 4 year period [Member]  
Disclosure of detailed information about financial instruments [line items]  
U.S. 10-year treasury yield 4.10%
U.S. 10-year BBB spread 1.60%
Exchange rate (U.S. dollar/Canadian dollar) 0.75
Base Forecast [Member] | Remaining 4 year period [Member] | Canada [member]  
Disclosure of detailed information about financial instruments [line items]  
Unemployment rate 5.90%
Real GDP 1.80%
Home prices 3.60%
Central bank policy interest rate 2.25%
Base Forecast [Member] | Remaining 4 year period [Member] | United States [member]  
Disclosure of detailed information about financial instruments [line items]  
Unemployment rate 4.00%
Real GDP 2.00%
Home prices 3.50%
Central bank policy interest rate 3.25%
Upside Scenario [Member] | Average Q3 2026 - Q2 2027 [Member]  
Disclosure of detailed information about financial instruments [line items]  
U.S. 10-year treasury yield 4.58%
U.S. 10-year BBB spread 1.24%
Exchange rate (U.S. dollar/Canadian dollar) 0.75
Upside Scenario [Member] | Average Q3 2026 - Q2 2027 [Member] | Canada [member]  
Disclosure of detailed information about financial instruments [line items]  
Unemployment rate 6.10%
Real GDP 1.90%
Home prices 3.00%
Central bank policy interest rate 2.75%
Upside Scenario [Member] | Average Q3 2026 - Q2 2027 [Member] | United States [member]  
Disclosure of detailed information about financial instruments [line items]  
Unemployment rate 4.00%
Real GDP 2.50%
Home prices 1.70%
Central bank policy interest rate 3.75%
Upside Scenario [Member] | Remaining 4 year period [Member]  
Disclosure of detailed information about financial instruments [line items]  
U.S. 10-year treasury yield 4.58%
U.S. 10-year BBB spread 1.53%
Exchange rate (U.S. dollar/Canadian dollar) 0.76
Upside Scenario [Member] | Remaining 4 year period [Member] | Canada [member]  
Disclosure of detailed information about financial instruments [line items]  
Unemployment rate 5.70%
Real GDP 2.10%
Home prices 3.80%
Central bank policy interest rate 2.75%
Upside Scenario [Member] | Remaining 4 year period [Member] | United States [member]  
Disclosure of detailed information about financial instruments [line items]  
Unemployment rate 3.70%
Real GDP 2.40%
Home prices 4.10%
Central bank policy interest rate 3.75%
Downside Scenario [Member] | Average Q3 2026 - Q2 2027 [Member]  
Disclosure of detailed information about financial instruments [line items]  
U.S. 10-year treasury yield 3.77%
U.S. 10-year BBB spread 2.33%
Exchange rate (U.S. dollar/Canadian dollar) 0.68
Downside Scenario [Member] | Average Q3 2026 - Q2 2027 [Member] | Canada [member]  
Disclosure of detailed information about financial instruments [line items]  
Unemployment rate 7.70%
Real GDP (0.80%)
Home prices (4.10%)
Central bank policy interest rate 1.13%
Downside Scenario [Member] | Average Q3 2026 - Q2 2027 [Member] | United States [member]  
Disclosure of detailed information about financial instruments [line items]  
Unemployment rate 5.50%
Real GDP (0.30%)
Home prices (6.00%)
Central bank policy interest rate 2.06%
Downside Scenario [Member] | Remaining 4 year period [Member]  
Disclosure of detailed information about financial instruments [line items]  
U.S. 10-year treasury yield 3.70%
U.S. 10-year BBB spread 1.91%
Exchange rate (U.S. dollar/Canadian dollar) 0.70
Downside Scenario [Member] | Remaining 4 year period [Member] | Canada [member]  
Disclosure of detailed information about financial instruments [line items]  
Unemployment rate 7.20%
Real GDP 2.10%
Home prices 2.80%
Central bank policy interest rate 1.42%
Downside Scenario [Member] | Remaining 4 year period [Member] | United States [member]  
Disclosure of detailed information about financial instruments [line items]  
Unemployment rate 5.40%
Real GDP 2.40%
Home prices 4.00%
Central bank policy interest rate 2.30%