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Risk Management - Significant Judgements and Estimates (Details) - 12 months ended Dec. 31, 2024
¥ in Millions, ¥ in Millions, $ in Millions, $ in Millions
CAD ($)
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USD ($)
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JPY (¥)
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CNY (¥)
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Canada        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions | $ $ 1,983      
Unemployment rate 6.70% 6.70% 6.70% 6.70%
NYMEX Light Sweet Crude Oil, in U.S. dollars, per barrel 76.0 76.0 76.0 76.0
Canada | Base case scenario | Next 12 months        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions 1.80% 1.80% 1.80% 1.80%
Unemployment rate 6.80% 6.80% 6.80% 6.80%
NYMEX Light Sweet Crude Oil, in U.S. dollars, per barrel 75.0 75.0 75.0 75.0
Canada | Base case scenario | 1 to 5 years        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions 2.00% 2.00% 2.00% 2.00%
Unemployment rate 6.30% 6.30% 6.30% 6.30%
NYMEX Light Sweet Crude Oil, in U.S. dollars, per barrel 72.0 72.0 72.0 72.0
Canada | Upside scenario | Next 12 months        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions 3.30% 3.30% 3.30% 3.30%
Unemployment rate 6.50% 6.50% 6.50% 6.50%
NYMEX Light Sweet Crude Oil, in U.S. dollars, per barrel 79.0 79.0 79.0 79.0
Canada | Upside scenario | 1 to 5 years        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions 2.30% 2.30% 2.30% 2.30%
Unemployment rate 5.80% 5.80% 5.80% 5.80%
NYMEX Light Sweet Crude Oil, in U.S. dollars, per barrel 74.0 74.0 74.0 74.0
Canada | Downside scenario 1 | Next 12 months        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions (2.00%) (2.00%) (2.00%) (2.00%)
Unemployment rate 8.10% 8.10% 8.10% 8.10%
NYMEX Light Sweet Crude Oil, in U.S. dollars, per barrel 59.0 59.0 59.0 59.0
Canada | Downside scenario 1 | 1 to 5 years        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions 2.30% 2.30% 2.30% 2.30%
Unemployment rate 8.20% 8.20% 8.20% 8.20%
NYMEX Light Sweet Crude Oil, in U.S. dollars, per barrel 66.0 66.0 66.0 66.0
Canada | Downside scenario 2 | Next 12 months        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions (3.90%) (3.90%) (3.90%) (3.90%)
Unemployment rate 8.50% 8.50% 8.50% 8.50%
NYMEX Light Sweet Crude Oil, in U.S. dollars, per barrel 50.0 50.0 50.0 50.0
Canada | Downside scenario 2 | 1 to 5 years        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions 2.20% 2.20% 2.20% 2.20%
Unemployment rate 10.00% 10.00% 10.00% 10.00%
NYMEX Light Sweet Crude Oil, in U.S. dollars, per barrel 61.0 61.0 61.0 61.0
U.S.        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions | $   $ 23,534    
Unemployment rate 4.20% 4.20% 4.20% 4.20%
7-10 Year BBB U.S. Corporate Index 5.50% 5.50% 5.50% 5.50%
U.S. | Base case scenario | Next 12 months        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions 2.10% 2.10% 2.10% 2.10%
Unemployment rate 4.10% 4.10% 4.10% 4.10%
7-10 Year BBB U.S. Corporate Index 6.10% 6.10% 6.10% 6.10%
U.S. | Base case scenario | 1 to 5 years        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions 2.20% 2.20% 2.20% 2.20%
Unemployment rate 4.00% 4.00% 4.00% 4.00%
7-10 Year BBB U.S. Corporate Index 6.10% 6.10% 6.10% 6.10%
U.S. | Upside scenario | Next 12 months        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions 3.60% 3.60% 3.60% 3.60%
Unemployment rate 3.30% 3.30% 3.30% 3.30%
7-10 Year BBB U.S. Corporate Index 5.90% 5.90% 5.90% 5.90%
U.S. | Upside scenario | 1 to 5 years        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions 2.30% 2.30% 2.30% 2.30%
Unemployment rate 3.30% 3.30% 3.30% 3.30%
7-10 Year BBB U.S. Corporate Index 6.20% 6.20% 6.20% 6.20%
U.S. | Downside scenario 1 | Next 12 months        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions (2.00%) (2.00%) (2.00%) (2.00%)
Unemployment rate 7.30% 7.30% 7.30% 7.30%
7-10 Year BBB U.S. Corporate Index 5.40% 5.40% 5.40% 5.40%
U.S. | Downside scenario 1 | 1 to 5 years        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions 2.70% 2.70% 2.70% 2.70%
Unemployment rate 6.10% 6.10% 6.10% 6.10%
7-10 Year BBB U.S. Corporate Index 5.60% 5.60% 5.60% 5.60%
U.S. | Downside scenario 2 | Next 12 months        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions (4.20%) (4.20%) (4.20%) (4.20%)
Unemployment rate 7.80% 7.80% 7.80% 7.80%
7-10 Year BBB U.S. Corporate Index 6.00% 6.00% 6.00% 6.00%
U.S. | Downside scenario 2 | 1 to 5 years        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions 2.50% 2.50% 2.50% 2.50%
Unemployment rate 8.10% 8.10% 8.10% 8.10%
7-10 Year BBB U.S. Corporate Index 5.40% 5.40% 5.40% 5.40%
Japan        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions | ¥     ¥ 563,281  
Unemployment rate 2.50% 2.50% 2.50% 2.50%
Japan | Base case scenario | Next 12 months        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions 0.90% 0.90% 0.90% 0.90%
Unemployment rate 2.50% 2.50% 2.50% 2.50%
Japan | Base case scenario | 1 to 5 years        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions 0.70% 0.70% 0.70% 0.70%
Unemployment rate 2.20% 2.20% 2.20% 2.20%
Japan | Upside scenario | Next 12 months        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions 2.80% 2.80% 2.80% 2.80%
Unemployment rate 2.40% 2.40% 2.40% 2.40%
Japan | Upside scenario | 1 to 5 years        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions 0.80% 0.80% 0.80% 0.80%
Unemployment rate 2.10% 2.10% 2.10% 2.10%
Japan | Downside scenario 1 | Next 12 months        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions (3.60%) (3.60%) (3.60%) (3.60%)
Unemployment rate 3.10% 3.10% 3.10% 3.10%
Japan | Downside scenario 1 | 1 to 5 years        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions 1.00% 1.00% 1.00% 1.00%
Unemployment rate 2.90% 2.90% 2.90% 2.90%
Japan | Downside scenario 2 | Next 12 months        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions (7.10%) (7.10%) (7.10%) (7.10%)
Unemployment rate 3.20% 3.20% 3.20% 3.20%
Japan | Downside scenario 2 | 1 to 5 years        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions 1.60% 1.60% 1.60% 1.60%
Unemployment rate 3.50% 3.50% 3.50% 3.50%
Hong Kong        
Disclosure of credit risk exposure [line items]        
Unemployment rate 3.00% 3.00% 3.00% 3.00%
Hang Seng Index and FTSE Xinhua A200 Index 19,448 19,448 19,448 19,448
Hong Kong | Base case scenario | Next 12 months        
Disclosure of credit risk exposure [line items]        
Unemployment rate 2.90% 2.90% 2.90% 2.90%
Hang Seng Index and FTSE Xinhua A200 Index 7.00% 7.00% 7.00% 7.00%
Hong Kong | Base case scenario | 1 to 5 years        
Disclosure of credit risk exposure [line items]        
Unemployment rate 3.00% 3.00% 3.00% 3.00%
Hang Seng Index and FTSE Xinhua A200 Index 4.10% 4.10% 4.10% 4.10%
Hong Kong | Upside scenario | Next 12 months        
Disclosure of credit risk exposure [line items]        
Unemployment rate 2.50% 2.50% 2.50% 2.50%
Hang Seng Index and FTSE Xinhua A200 Index 18.10% 18.10% 18.10% 18.10%
Hong Kong | Upside scenario | 1 to 5 years        
Disclosure of credit risk exposure [line items]        
Unemployment rate 2.70% 2.70% 2.70% 2.70%
Hang Seng Index and FTSE Xinhua A200 Index 3.70% 3.70% 3.70% 3.70%
Hong Kong | Downside scenario 1 | Next 12 months        
Disclosure of credit risk exposure [line items]        
Unemployment rate 4.10% 4.10% 4.10% 4.10%
Hang Seng Index and FTSE Xinhua A200 Index (19.70%) (19.70%) (19.70%) (19.70%)
Hong Kong | Downside scenario 1 | 1 to 5 years        
Disclosure of credit risk exposure [line items]        
Unemployment rate 3.80% 3.80% 3.80% 3.80%
Hang Seng Index and FTSE Xinhua A200 Index 9.90% 9.90% 9.90% 9.90%
Hong Kong | Downside scenario 2 | Next 12 months        
Disclosure of credit risk exposure [line items]        
Unemployment rate 4.60% 4.60% 4.60% 4.60%
Hang Seng Index and FTSE Xinhua A200 Index (37.00%) (37.00%) (37.00%) (37.00%)
Hong Kong | Downside scenario 2 | 1 to 5 years        
Disclosure of credit risk exposure [line items]        
Unemployment rate 4.60% 4.60% 4.60% 4.60%
Hang Seng Index and FTSE Xinhua A200 Index 13.50% 13.50% 13.50% 13.50%
China        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions | ¥       ¥ 114,931
Hang Seng Index and FTSE Xinhua A200 Index 10,938 10,938 10,938 10,938
China | Base case scenario | Next 12 months        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions 4.00% 4.00% 4.00% 4.00%
Hang Seng Index and FTSE Xinhua A200 Index (0.60%) (0.60%) (0.60%) (0.60%)
China | Base case scenario | 1 to 5 years        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions 4.10% 4.10% 4.10% 4.10%
Hang Seng Index and FTSE Xinhua A200 Index 4.80% 4.80% 4.80% 4.80%
China | Upside scenario | Next 12 months        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions 6.50% 6.50% 6.50% 6.50%
Hang Seng Index and FTSE Xinhua A200 Index 13.80% 13.80% 13.80% 13.80%
China | Upside scenario | 1 to 5 years        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions 4.30% 4.30% 4.30% 4.30%
Hang Seng Index and FTSE Xinhua A200 Index 2.80% 2.80% 2.80% 2.80%
China | Downside scenario 1 | Next 12 months        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions (3.00%) (3.00%) (3.00%) (3.00%)
Hang Seng Index and FTSE Xinhua A200 Index (31.10%) (31.10%) (31.10%) (31.10%)
China | Downside scenario 1 | 1 to 5 years        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions 4.60% 4.60% 4.60% 4.60%
Hang Seng Index and FTSE Xinhua A200 Index 11.70% 11.70% 11.70% 11.70%
China | Downside scenario 2 | Next 12 months        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions (5.70%) (5.70%) (5.70%) (5.70%)
Hang Seng Index and FTSE Xinhua A200 Index (40.50%) (40.50%) (40.50%) (40.50%)
China | Downside scenario 2 | 1 to 5 years        
Disclosure of credit risk exposure [line items]        
Gross Domestic Product (GDP), in U.S. $ billions 3.90% 3.90% 3.90% 3.90%
Hang Seng Index and FTSE Xinhua A200 Index 13.50% 13.50% 13.50% 13.50%