v3.26.1
Loans, Impaired Loans and Allowance for Credit Losses - Summary of Key Macroeconomic Variables Used for Allowance for Credit Losses Calculations (Detail)
3 Months Ended 12 Months Ended
Jul. 31, 2026
$ / lb
$ / bbl
Apr. 30, 2026
$ / lb
$ / bbl
Oct. 31, 2025
$ / lb
$ / bbl
Base case scenario [member] | Canada [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 1.70% 1.60% 1.20%
Consumer price index, y/y % 2.60% 3.10% 1.90%
Unemployment rate, average % 6.40% 6.40% 7.00%
Bank of Canada overnight rate target, average % 2.80% 2.80% 2.30%
HPI – Housing Price Index, y/y % change (2.30%) (1.60%) 1.90%
USD/CAD exchange rate, average 1.33 1.34 1.32
Base case scenario [member] | Canada [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 2.00% 2.00% 2.20%
Consumer price index, y/y % 1.80% 1.90% 2.20%
Unemployment rate, average % 6.10% 5.90% 5.80%
Bank of Canada overnight rate target, average % 2.90% 2.90% 2.80%
HPI – Housing Price Index, y/y % change 5.10% 4.70% 6.20%
USD/CAD exchange rate, average 1.29 1.3 1.3
Base case scenario [member] | United States [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 1.70% 1.60% 1.40%
Consumer price index, y/y % 3.20% 3.00% 2.60%
Target federal funds rate, upper limit, average % 3.40% 3.60% 3.30%
Unemployment rate, average % 4.20% 4.30% 4.50%
Base case scenario [member] | United States [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 2.30% 2.40% 2.30%
Consumer price index, y/y % 2.30% 2.40% 2.50%
Target federal funds rate, upper limit, average % 3.20% 3.40% 3.00%
Unemployment rate, average % 4.10% 4.00% 4.30%
Base case scenario [member] | Mexico [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 1.20% 0.90% (0.20%)
Unemployment rate, average % 3.20% 3.50% 3.30%
Base case scenario [member] | Mexico [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 1.80% 1.90% 2.20%
Unemployment rate, average % 3.60% 3.80% 3.70%
Base case scenario [member] | Chile [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 3.20% 2.50% 2.40%
Unemployment rate, average % 7.80% 8.10% 7.90%
Base case scenario [member] | Chile [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 2.10% 2.10% 2.00%
Unemployment rate, average % 7.30% 7.30% 6.70%
Base case scenario [member] | Peru [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 3.10% 3.30% 2.90%
Unemployment rate, average % 5.60% 5.80% 5.70%
Base case scenario [member] | Peru [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 2.80% 2.70% 3.10%
Unemployment rate, average % 6.00% 6.00% 6.10%
Base case scenario [member] | Colombia [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change     2.90%
Unemployment rate, average %     10.30%
Base case scenario [member] | Colombia [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change     2.50%
Unemployment rate, average %     9.90%
Base case scenario [member] | Caribbean [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 3.60% 3.70% 3.70%
Base case scenario [member] | Caribbean [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 4.00% 4.00% 4.00%
Base case scenario [member] | Global WTI oil price [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Average price of hedging instrument | $ / bbl 79 85 60
Base case scenario [member] | Global WTI oil price [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Average price of hedging instrument | $ / bbl 69 69 66
Base case scenario [member] | Global Copper price [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Average price of hedging instrument | $ / lb 5.89 5.39 4.19
Base case scenario [member] | Global Copper price [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Average price of hedging instrument | $ / lb 6.37 5.86 4.68
Base case scenario [member] | Global GDP and PPP [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Global GDP, y/y % change 3.00% 2.40% 2.20%
Base case scenario [member] | Global GDP and PPP [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Global GDP, y/y % change 2.80% 2.80% 2.70%
Alternative Scenario - Optimistic [member] | Canada [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 2.70% 2.60% 2.40%
Consumer price index, y/y % 2.80% 3.30% 2.10%
Unemployment rate, average % 6.00% 5.90% 6.60%
Bank of Canada overnight rate target, average % 3.10% 3.10% 2.80%
HPI – Housing Price Index, y/y % change (1.60%) (0.90%) 2.60%
USD/CAD exchange rate, average 1.32 1.33 1.31
Alternative Scenario - Optimistic [member] | Canada [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 2.80% 2.90% 3.10%
Consumer price index, y/y % 2.10% 2.40% 2.70%
Unemployment rate, average % 5.20% 4.50% 4.70%
Bank of Canada overnight rate target, average % 3.60% 3.70% 3.70%
HPI – Housing Price Index, y/y % change 6.20% 6.20% 7.70%
USD/CAD exchange rate, average 1.27 1.28 1.29
Alternative Scenario - Optimistic [member] | United States [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 2.20% 2.20% 1.90%
Consumer price index, y/y % 3.50% 3.20% 2.70%
Target federal funds rate, upper limit, average % 3.80% 3.80% 3.50%
Unemployment rate, average % 4.10% 4.10% 4.40%
Alternative Scenario - Optimistic [member] | United States [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 3.20% 3.30% 3.20%
Consumer price index, y/y % 2.60% 2.80% 2.80%
Target federal funds rate, upper limit, average % 3.70% 4.00% 3.50%
Unemployment rate, average % 3.70% 3.60% 4.00%
Alternative Scenario - Optimistic [member] | Mexico [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 1.60% 1.30% 0.60%
Unemployment rate, average % 3.10% 3.30% 3.20%
Alternative Scenario - Optimistic [member] | Mexico [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 2.50% 2.60% 2.90%
Unemployment rate, average % 3.10% 3.30% 3.10%
Alternative Scenario - Optimistic [member] | Chile [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 4.60% 3.30% 3.50%
Unemployment rate, average % 7.50% 7.90% 7.70%
Alternative Scenario - Optimistic [member] | Chile [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 2.90% 3.00% 2.80%
Unemployment rate, average % 6.80% 6.80% 6.40%
Alternative Scenario - Optimistic [member] | Peru [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 4.60% 4.40% 4.10%
Unemployment rate, average % 5.10% 5.40% 5.30%
Alternative Scenario - Optimistic [member] | Peru [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 3.80% 3.50% 4.00%
Unemployment rate, average % 5.00% 5.10% 5.20%
Alternative Scenario - Optimistic [member] | Colombia [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change     4.00%
Unemployment rate, average %     10.00%
Alternative Scenario - Optimistic [member] | Colombia [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change     3.40%
Unemployment rate, average %     9.10%
Alternative Scenario - Optimistic [member] | Caribbean [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 4.00% 4.10% 4.40%
Alternative Scenario - Optimistic [member] | Caribbean [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 4.80% 4.70% 4.70%
Alternative Scenario - Optimistic [member] | Global WTI oil price [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Average price of hedging instrument | $ / bbl 85 89 64
Alternative Scenario - Optimistic [member] | Global WTI oil price [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Average price of hedging instrument | $ / bbl 81 83 78
Alternative Scenario - Optimistic [member] | Global Copper price [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Average price of hedging instrument | $ / lb 6.07 5.51 4.29
Alternative Scenario - Optimistic [member] | Global Copper price [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Average price of hedging instrument | $ / lb 6.91 6.38 5.03
Alternative Scenario - Optimistic [member] | Global GDP and PPP [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Global GDP, y/y % change 3.70% 3.20% 3.00%
Alternative Scenario - Optimistic [member] | Global GDP and PPP [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Global GDP, y/y % change 3.70% 3.70% 3.50%
Alternative Scenario - Pessimistic [member] | Canada [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change (1.10%) (1.00%) (1.10%)
Consumer price index, y/y % 2.00% 2.60% 1.40%
Unemployment rate, average % 7.70% 7.60% 8.20%
Bank of Canada overnight rate target, average % 2.10% 2.10% 2.10%
HPI – Housing Price Index, y/y % change (6.50%) (5.60%) (2.00%)
USD/CAD exchange rate, average 1.4 1.4 1.37
Alternative Scenario - Pessimistic [member] | Canada [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 2.60% 2.60% 2.70%
Consumer price index, y/y % 1.60% 1.70% 2.00%
Unemployment rate, average % 6.80% 6.50% 6.40%
Bank of Canada overnight rate target, average % 2.30% 2.40% 2.40%
HPI – Housing Price Index, y/y % change 5.70% 5.30% 6.70%
USD/CAD exchange rate, average 1.27 1.28 1.29
Alternative Scenario - Pessimistic [member] | United States [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change (1.10%) (1.10%) (1.00%)
Consumer price index, y/y % 3.40% 3.20% 2.70%
Target federal funds rate, upper limit, average % 3.40% 3.50% 3.20%
Unemployment rate, average % 5.70% 5.70% 5.80%
Alternative Scenario - Pessimistic [member] | United States [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 3.10% 3.10% 3.00%
Consumer price index, y/y % 2.20% 2.30% 2.40%
Target federal funds rate, upper limit, average % 2.80% 3.00% 2.70%
Unemployment rate, average % 4.60% 4.50% 4.80%
Alternative Scenario - Pessimistic [member] | Mexico [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change (1.40%) (1.60%) (2.40%)
Unemployment rate, average % 3.90% 4.20% 3.90%
Alternative Scenario - Pessimistic [member] | Mexico [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 2.30% 2.40% 2.60%
Unemployment rate, average % 3.70% 3.90% 3.80%
Alternative Scenario - Pessimistic [member] | Chile [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 0.70% 0.10% 0.30%
Unemployment rate, average % 9.10% 9.30% 9.00%
Alternative Scenario - Pessimistic [member] | Chile [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 2.70% 2.70% 2.60%
Unemployment rate, average % 7.50% 7.50% 6.90%
Alternative Scenario - Pessimistic [member] | Peru [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 0.40% 0.70% 0.60%
Unemployment rate, average % 6.80% 6.90% 6.70%
Alternative Scenario - Pessimistic [member] | Peru [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 3.40% 3.20% 3.60%
Unemployment rate, average % 6.40% 6.40% 6.50%
Alternative Scenario - Pessimistic [member] | Colombia [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change     0.70%
Unemployment rate, average %     12.00%
Alternative Scenario - Pessimistic [member] | Colombia [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change     3.00%
Unemployment rate, average %     10.50%
Alternative Scenario - Pessimistic [member] | Caribbean [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 1.60% 1.80% 1.60%
Alternative Scenario - Pessimistic [member] | Caribbean [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 4.50% 4.40% 4.40%
Alternative Scenario - Pessimistic [member] | Global WTI oil price [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Average price of hedging instrument | $ / bbl 68 74 53
Alternative Scenario - Pessimistic [member] | Global WTI oil price [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Average price of hedging instrument | $ / bbl 62 63 61
Alternative Scenario - Pessimistic [member] | Global Copper price [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Average price of hedging instrument | $ / lb 5.43 4.99 3.92
Alternative Scenario - Pessimistic [member] | Global Copper price [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Average price of hedging instrument | $ / lb 6.24 5.74 4.6
Alternative Scenario - Pessimistic [member] | Global GDP and PPP [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Global GDP, y/y % change 0.70% 0.30% 0.30%
Alternative Scenario - Pessimistic [member] | Global GDP and PPP [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Global GDP, y/y % change 3.40% 3.40% 3.20%
Alternative Scenario - Very Pessimistic [Member] | Canada [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change (4.60%) (4.40%) (4.40%)
Consumer price index, y/y % 6.10% 6.50% 5.00%
Unemployment rate, average % 10.60% 10.40% 11.20%
Bank of Canada overnight rate target, average % 3.60% 3.50% 3.10%
HPI – Housing Price Index, y/y % change (9.80%) (8.90%) (5.10%)
USD/CAD exchange rate, average 1.48 1.48 1.45
Alternative Scenario - Very Pessimistic [Member] | Canada [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 3.20% 3.30% 3.40%
Consumer price index, y/y % 2.10% 2.10% 2.40%
Unemployment rate, average % 7.40% 7.10% 7.00%
Bank of Canada overnight rate target, average % 3.50% 3.50% 3.30%
HPI – Housing Price Index, y/y % change 5.20% 4.80% 6.20%
USD/CAD exchange rate, average 1.29 1.3 1.3
Alternative Scenario - Very Pessimistic [Member] | United States [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change (4.00%) (3.90%) (3.70%)
Consumer price index, y/y % 7.10% 6.80% 6.00%
Target federal funds rate, upper limit, average % 4.30% 4.40% 3.90%
Unemployment rate, average % 8.00% 8.10% 8.10%
Alternative Scenario - Very Pessimistic [Member] | United States [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 3.60% 3.60% 3.50%
Consumer price index, y/y % 2.50% 2.60% 2.70%
Target federal funds rate, upper limit, average % 3.90% 4.10% 3.60%
Unemployment rate, average % 4.90% 4.80% 5.20%
Alternative Scenario - Very Pessimistic [Member] | Mexico [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change (4.70%) (4.80%) (5.50%)
Unemployment rate, average % 6.10% 6.50% 6.10%
Alternative Scenario - Very Pessimistic [Member] | Mexico [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 3.00% 3.10% 3.30%
Unemployment rate, average % 4.50% 4.80% 4.60%
Alternative Scenario - Very Pessimistic [Member] | Chile [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change (3.50%) (4.00%) (3.70%)
Unemployment rate, average % 11.40% 11.60% 11.20%
Alternative Scenario - Very Pessimistic [Member] | Chile [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 3.60% 3.70% 3.50%
Unemployment rate, average % 8.00% 8.00% 7.30%
Alternative Scenario - Very Pessimistic [Member] | Peru [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change (1.20%) (0.80%) (1.00%)
Unemployment rate, average % 10.60% 10.90% 10.50%
Alternative Scenario - Very Pessimistic [Member] | Peru [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 3.90% 3.80% 4.10%
Unemployment rate, average % 7.60% 7.50% 7.60%
Alternative Scenario - Very Pessimistic [Member] | Colombia [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change     (1.00%)
Unemployment rate, average %     18.90%
Alternative Scenario - Very Pessimistic [Member] | Colombia [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change     3.50%
Unemployment rate, average %     12.50%
Alternative Scenario - Very Pessimistic [Member] | Caribbean [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change (0.10%) (0.60%) (0.60%)
Alternative Scenario - Very Pessimistic [Member] | Caribbean [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Real GDP growth, y/y % change 5.00% 4.90% 4.90%
Alternative Scenario - Very Pessimistic [Member] | Global WTI oil price [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Average price of hedging instrument | $ / bbl 127 130 45
Alternative Scenario - Very Pessimistic [Member] | Global WTI oil price [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Average price of hedging instrument | $ / bbl 73 74 56
Alternative Scenario - Very Pessimistic [Member] | Global Copper price [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Average price of hedging instrument | $ / lb 5.93 5.41 3.61
Alternative Scenario - Very Pessimistic [Member] | Global Copper price [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Average price of hedging instrument | $ / lb 6.22 5.72 4.47
Alternative Scenario - Very Pessimistic [Member] | Global GDP and PPP [member] | Next 12 Months [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Global GDP, y/y % change (1.90%) (2.30%) (2.20%)
Alternative Scenario - Very Pessimistic [Member] | Global GDP and PPP [member] | Remaining forecast period [member]      
Disclosure of Primary Macroeconomic Drivers of Credit Losses [Line Items]      
Global GDP, y/y % change 3.90% 3.90% 3.70%