v3.26.1
Loans, Impaired Loans, and Allowance for Credit Losses (Summary of Macroeconomic Variables impacted in Determining ECLs) (Details)
 6 Months Ended
Apr. 30, 2026
$ / shares
Base Forecast [Member] | Average Q2 2026 - Q1 2027 [Member]  
Disclosure of detailed information about financial instruments [line items]  
U.S. 10-year treasury yield 4.16%
U.S. 10-year BBB spread 1.38%
Exchange rate (U.S. dollar/Canadian dollar) 0.74
Base Forecast [Member] | Average Q2 2026 - Q1 2027 [Member] | Canada [member]  
Disclosure of detailed information about financial instruments [line items]  
Unemployment rate 6.60%
Real GDP 1.30%
Home prices 0.00%
Central bank policy interest rate 2.25%
Base Forecast [Member] | Average Q2 2026 - Q1 2027 [Member] | United States [member]  
Disclosure of detailed information about financial instruments [line items]  
Unemployment rate 4.30%
Real GDP 2.30%
Home prices 2.80%
Central bank policy interest rate 3.44%
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 6.00%
Real GDP 1.80%
Home prices 3.70%
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 Q2 2026 - Q1 2027 [Member]  
Disclosure of detailed information about financial instruments [line items]  
U.S. 10-year treasury yield 4.47%
U.S. 10-year BBB spread 1.18%
Exchange rate (U.S. dollar/Canadian dollar) 0.75
Upside Scenario [Member] | Average Q2 2026 - Q1 2027 [Member] | Canada [member]  
Disclosure of detailed information about financial instruments [line items]  
Unemployment rate 6.10%
Real GDP 1.70%
Home prices 2.40%
Central bank policy interest rate 2.50%
Upside Scenario [Member] | Average Q2 2026 - Q1 2027 [Member] | United States [member]  
Disclosure of detailed information about financial instruments [line items]  
Unemployment rate 4.10%
Real GDP 2.60%
Home prices 3.20%
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 4.57%
U.S. 10-year BBB spread 1.52%
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 5.60%
Real GDP 1.90%
Home prices 4.30%
Central bank policy interest rate 2.50%
Upside Scenario [Member] | Remaining 4 year period [Member] | United States [member]  
Disclosure of detailed information about financial instruments [line items]  
Unemployment rate 3.80%
Real GDP 2.40%
Home prices 4.10%
Central bank policy interest rate 3.75%
Downside Scenario [Member] | Average Q2 2026 - Q1 2027 [Member]  
Disclosure of detailed information about financial instruments [line items]  
U.S. 10-year treasury yield 3.67%
U.S. 10-year BBB spread 2.21%
Exchange rate (U.S. dollar/Canadian dollar) 0.69
Downside Scenario [Member] | Average Q2 2026 - Q1 2027 [Member] | Canada [member]  
Disclosure of detailed information about financial instruments [line items]  
Unemployment rate 7.60%
Real GDP (0.70%)
Home prices (6.30%)
Central bank policy interest rate 1.13%
Downside Scenario [Member] | Average Q2 2026 - Q1 2027 [Member] | United States [member]  
Disclosure of detailed information about financial instruments [line items]  
Unemployment rate 5.50%
Real GDP (0.20%)
Home prices (6.10%)
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 3.68%
U.S. 10-year BBB spread 1.90%
Exchange rate (U.S. dollar/Canadian dollar) 0.71
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 3.00%
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 2.50%
Home prices 4.40%
Central bank policy interest rate 2.30%