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Risk Management - Net Fair Value of Risk Management Positions (Detail) MMBbls in Millions, $ in Millions | Jun. 30, 2022 CAD ($) MMBbls $ / bbl | Dec. 31, 2021 CAD ($)
--- | --- | ---
Disclosure of Derivative Financial Instruments [Line Items] |  |
Fair Value Asset (Liability) | $ 1 | $ (68)
Foreign Exchange Contracts |  |
Disclosure of Derivative Financial Instruments [Line Items] |  |
Fair Value Asset (Liability) | $ 1 |
Minimum |  |
Disclosure of Derivative Financial Instruments [Line Items] |  |
Financial instruments, term | 1 month |
Maximum |  |
Disclosure of Derivative Financial Instruments [Line Items] |  |
Financial instruments, term | 11 months |
WTI Fixed - Sell | Crude Oil and Condensate Contracts |  |
Disclosure of Derivative Financial Instruments [Line Items] |  |
Notional Volumes | MMBbls | 4.0 |
Weighted Average Price | $ / bbl | 104.17 |
Fair Value Asset (Liability) | $ 11 |
WTI Fixed - Buy | Crude Oil and Condensate Contracts |  |
Disclosure of Derivative Financial Instruments [Line Items] |  |
Notional Volumes | MMBbls | 1.6 |
Weighted Average Price | $ / bbl | 104.75 |
Fair Value Asset (Liability) | $ (1) |
Other financial positions |  |
Disclosure of Derivative Financial Instruments [Line Items] |  |
Fair Value Asset (Liability) | $ (10) |

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