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Risk Management - Net Fair Value of Risk Management Positions (Detail) MMBbls in Millions, $ in Millions | Sep. 30, 2024 CAD ($) $ / bbl MMBbls | Dec. 31, 2023 CAD ($)
--- | --- | ---
Disclosure of Derivative Financial Instruments [Line Items] |  |
Fair Value Asset (Liability) | $ (11) | $ 12
Power Swap Contracts |  |
Disclosure of Derivative Financial Instruments [Line Items] |  |
Fair Value Asset (Liability) | 4 |
Renewable Power Contracts |  |
Disclosure of Derivative Financial Instruments [Line Items] |  |
Fair Value Asset (Liability) | $ (13) |
WTI Fixed - Sell | Crude Oil and Condensate Contracts |  |
Disclosure of Derivative Financial Instruments [Line Items] |  |
Notional Volumes | MMBbls | 2.1 |
Weighted Average Price | $ / bbl | 71.84 |
Fair Value Asset (Liability) | $ 11 |
WTI Fixed - Buy | Crude Oil and Condensate Contracts |  |
Disclosure of Derivative Financial Instruments [Line Items] |  |
Notional Volumes | MMBbls | 1.0 |
Weighted Average Price | $ / bbl | 67.84 |
Fair Value Asset (Liability) | $ (8) |
Other financial positions |  |
Disclosure of Derivative Financial Instruments [Line Items] |  |
Fair Value Asset (Liability) | $ (5) |

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