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Asset Impairments and Transactions - White Rose assets (Details) - Exploration and Production - White Rose $ in Millions | 3 Months Ended
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Jun. 30, 2022 CAD ($) $ / bbl bbl / d | Mar. 31, 2022
Asset Impairments and Transactions |  |
Additional interest acquired (as a percent) | 12.50% |
Ownership interest (as percent) | 39.00% | 26.00%
Cash received in transaction to acquire additional ownership interest | $ 38 |
Tax effect of transaction to acquire additional ownership interest | 12 |
Reversal of impairment loss, net of tax | 542 |
Tax effect of the reversal of impairment loss | 173 |
Company's share of future capital expenditures | $ 1,500 |
Impairment testing assumption, risk-adjusted discount rate, after tax | 9.00% |
Forecast for the first half of 2026 |  |
Asset Impairments and Transactions |  |
Impairment testing assumption, share of barrels per day of crude oil produced | bbl / d | 9,800 |
Brent crude oil | Forecast for 2023 |  |
Asset Impairments and Transactions |  |
Impairment testing assumption, price per barrel | $ / bbl | 85.00 |
Brent crude oil | Forecast for 2024 |  |
Asset Impairments and Transactions |  |
Impairment testing assumption, price per barrel | $ / bbl | 68.00 |
Brent crude oil | Forecast for 2025 |  |
Asset Impairments and Transactions |  |
Impairment testing assumption, price per barrel | $ / bbl | 69.00 |
Brent crude oil | Forecast for 2026 to 2038 |  |
Asset Impairments and Transactions |  |
Impairment testing assumption, price per barrel escalation percentage | 2.00% |

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