Goodwill and Other Intangible Assets - Goodwill Impairment (Details) - Oil Sands - CGU-Asset impairment testing - $ / bbl	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021
Goodwill and Other Intangible Assets
After-tax discount rate applied to cash flow projections	7.80%	7.50%
Cash flow forecast period	P50Y
Maximum
Goodwill and Other Intangible Assets
Cash flow forecast period	P55Y
Forecast for after 2025
Goodwill and Other Intangible Assets
Impairment testing assumption, price per barrel escalation percentage	2.00%
WTI \| Forecast for 2022
Goodwill and Other Intangible Assets
Impairment testing assumption, price per barrel	80.00
WTI \| Forecast for 2023
Goodwill and Other Intangible Assets
Impairment testing assumption, price per barrel	71.40
WTI \| Forecast for 2024
Goodwill and Other Intangible Assets
Impairment testing assumption, price per barrel	62.42

The discount rate applied to cash flow projections for a cash-generating unit (group of units). [Refer: Cash-generating units [member]]

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The growth rate used to extrapolate cash flow projections beyond the period covered by the most recent budgets/forecasts for a cash-generating unit (group of units). [Refer: Cash-generating units [member]]

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The price per barrel of crude oil used as an assumption in asset impairment testing.

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