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Impairment Charges and Reversals - Forward Price Assumptions (Details) | Dec. 31, 2023 $ / bbl $ / Mcf $ / bbl | Dec. 31, 2022 $ / bbl $ / bbl $ / Mcf
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West Texas Intermediate | 1 Year |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Long-term price assumptions used in current measurement of fair value less costs of disposal | 73.67 | 80.33
West Texas Intermediate | 2 Years |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Long-term price assumptions used in current measurement of fair value less costs of disposal | 74.98 | 78.50
West Texas Intermediate | 3 Years |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Long-term price assumptions used in current measurement of fair value less costs of disposal | 76.14 | 76.95
West Texas Intermediate | 4 Years |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Long-term price assumptions used in current measurement of fair value less costs of disposal | 77.66 | 77.61
West Texas Intermediate | 5 Years |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Long-term price assumptions used in current measurement of fair value less costs of disposal | 79.22 | 79.16
West Texas Intermediate | Thereafter |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Forward price, average annual increase | 2.00% | 2.00%
Western Canada Select | 1 Year |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Long-term price assumptions used in current measurement of fair value less costs of disposal | 76.74 | 76.54
Western Canada Select | 2 Years |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Long-term price assumptions used in current measurement of fair value less costs of disposal | 79.77 | 77.75
Western Canada Select | 3 Years |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Long-term price assumptions used in current measurement of fair value less costs of disposal | 81.12 | 77.55
Western Canada Select | 4 Years |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Long-term price assumptions used in current measurement of fair value less costs of disposal | 82.88 | 80.07
Western Canada Select | 5 Years |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Long-term price assumptions used in current measurement of fair value less costs of disposal | 85.04 | 81.89
Western Canada Select | Thereafter |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Forward price, average annual increase | 2.00% | 2.00%
Edmonton C5+ | 1 Year |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Long-term price assumptions used in current measurement of fair value less costs of disposal | 96.79 | 106.22
Edmonton C5+ | 2 Years |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Long-term price assumptions used in current measurement of fair value less costs of disposal | 98.75 | 101.35
Edmonton C5+ | 3 Years |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Long-term price assumptions used in current measurement of fair value less costs of disposal | 100.71 | 98.94
Edmonton C5+ | 4 Years |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Long-term price assumptions used in current measurement of fair value less costs of disposal | 102.72 | 100.19
Edmonton C5+ | 5 Years |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Long-term price assumptions used in current measurement of fair value less costs of disposal | 104.78 | 101.74
Edmonton C5+ | Thereafter |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Forward price, average annual increase | 2.00% | 2.00%
Alberta Energy Company Natural Gas | 1 Year |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Long-term price assumptions used in current measurement of fair value less costs of disposal | $ / Mcf | 2.20 | 4.23
Alberta Energy Company Natural Gas | 2 Years |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Long-term price assumptions used in current measurement of fair value less costs of disposal | $ / Mcf | 3.37 | 4.40
Alberta Energy Company Natural Gas | 3 Years |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Long-term price assumptions used in current measurement of fair value less costs of disposal | $ / Mcf | 4.05 | 4.21
Alberta Energy Company Natural Gas | 4 Years |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Long-term price assumptions used in current measurement of fair value less costs of disposal | $ / Mcf | 4.13 | 4.27
Alberta Energy Company Natural Gas | 5 Years |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Long-term price assumptions used in current measurement of fair value less costs of disposal | $ / Mcf | 4.21 | 4.34
Alberta Energy Company Natural Gas | Thereafter |  |
Disclosure of information for impairment loss recognised or reversed for individual asset or cash-generating unit [line items] |  |
Forward price, average annual increase | 2.00% | 2.00%

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