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Risk Management - Impact of Fluctuating Commodity Prices and Interest Rates on Company'S Open Risk Management Positions (Detail) $ in Millions | Jun. 30, 2022 CAD ($) $ / bbl
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Commodity price risk | Crude Oil Contracts |
Disclosure of Nature and Extent of Risks Arising from Financial Instruments [Line Items] |
Sensitivity Range | $ / bbl | 5.00
Increase | $ 0
Decrease | $ 0
Commodity price risk | WCS and Condensate Differential |
Disclosure of Nature and Extent of Risks Arising from Financial Instruments [Line Items] |
Sensitivity Range | $ / bbl | 2.50
Increase | $ (9)
Decrease | $ 9
Commodity price risk | Refined Products |
Disclosure of Nature and Extent of Risks Arising from Financial Instruments [Line Items] |
Sensitivity Range | $ / bbl | 5.00
Increase | $ (3)
Decrease | $ 3
Commodity price risk | Power Commodity |
Disclosure of Nature and Extent of Risks Arising from Financial Instruments [Line Items] |
Sensitivity Range | $ / bbl | 20.00
Increase | $ 33
Decrease | $ (33)
Currency risk | U.S. to Canadian Dollar Exchange Rate |
Disclosure of Nature and Extent of Risks Arising from Financial Instruments [Line Items] |
Sensitivity Range | $ / bbl | 0.05
Increase | $ 33
Decrease | $ (37)

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