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Financial Instrument Risk Management - Key Macroeconomic Assumptions (Details)
Dec. 31, 2023
$ / bbl
Current quarter | U.S.  
Disclosure of credit risk exposure [line items]  
Gross Domestic Product 2253800000000.00%
Unemployment Rate 3.80%
BBB Bonds Spreads 1.90%
Current quarter | Canada  
Disclosure of credit risk exposure [line items]  
Gross Domestic Product 220100000000.00%
Unemployment Rate 5.80%
Oil Price (in dollars per barrel) 85.60
Under 1 Year | U.S. | Base Case  
Disclosure of credit risk exposure [line items]  
Gross Domestic Product 1.30%
Unemployment Rate 4.00%
BBB Bonds Spreads 2.20%
Under 1 Year | U.S. | Upside  
Disclosure of credit risk exposure [line items]  
Gross Domestic Product 3.50%
Unemployment Rate 3.10%
BBB Bonds Spreads 1.90%
Under 1 Year | U.S. | Downside  
Disclosure of credit risk exposure [line items]  
Gross Domestic Product (2.40%)
Unemployment Rate 6.70%
BBB Bonds Spreads 3.10%
Under 1 Year | Canada | Base Case  
Disclosure of credit risk exposure [line items]  
Gross Domestic Product 1.60%
Unemployment Rate 6.00%
Oil Price (in dollars per barrel) 82.10
Under 1 Year | Canada | Upside  
Disclosure of credit risk exposure [line items]  
Gross Domestic Product 3.60%
Unemployment Rate 5.20%
Oil Price (in dollars per barrel) 84.70
Under 1 Year | Canada | Downside  
Disclosure of credit risk exposure [line items]  
Gross Domestic Product (2.10%)
Unemployment Rate 8.20%
Oil Price (in dollars per barrel) 65.60
Remaining forecast period | U.S. | Base Case  
Disclosure of credit risk exposure [line items]  
Gross Domestic Product 2.20%
Unemployment Rate 4.00%
BBB Bonds Spreads 2.10%
Remaining forecast period | U.S. | Upside  
Disclosure of credit risk exposure [line items]  
Gross Domestic Product 2.40%
Unemployment Rate 3.30%
BBB Bonds Spreads 2.10%
Remaining forecast period | U.S. | Downside  
Disclosure of credit risk exposure [line items]  
Gross Domestic Product 2.50%
Unemployment Rate 6.70%
BBB Bonds Spreads 2.10%
Remaining forecast period | Canada | Base Case  
Disclosure of credit risk exposure [line items]  
Gross Domestic Product 1.90%
Unemployment Rate 5.90%
Oil Price (in dollars per barrel) 71.40
Remaining forecast period | Canada | Upside  
Disclosure of credit risk exposure [line items]  
Gross Domestic Product 2.30%
Unemployment Rate 4.80%
Oil Price (in dollars per barrel) 71.80
Remaining forecast period | Canada | Downside  
Disclosure of credit risk exposure [line items]  
Gross Domestic Product 1.60%
Unemployment Rate 8.60%
Oil Price (in dollars per barrel) 61.00