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Impairment Charges and Reversals - Crude Oil and Forward Crack Spreads (Details)
Dec. 31, 2022
$ / bbl
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 to Determine Future Cash Flows 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 to Determine Future Cash Flows 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 to Determine Future Cash Flows 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 to Determine Future Cash Flows 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 to Determine Future Cash Flows 79.16
WTI-WTS | 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 to Determine Future Cash Flows (0.56)
WTI-WTS | 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 to Determine Future Cash Flows (0.56)
WTI-WTS | 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 to Determine Future Cash Flows (0.56)
WTI-WTS | 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 to Determine Future Cash Flows (0.56)
WTI-WTS | 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 to Determine Future Cash Flows (0.56)
WTI-WCS | 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 to Determine Future Cash Flows (23.32)
WTI-WCS | 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 to Determine Future Cash Flows (19.09)
WTI-WCS | 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 to Determine Future Cash Flows (17.42)
WTI-WCS | 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 to Determine Future Cash Flows (15.87)
WTI-WCS | 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 to Determine Future Cash Flows (15.74)
Chicago 3-2-1 Crack Spreads (WTI) | 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 to Determine Future Cash Flows 29.37
Chicago 3-2-1 Crack Spreads (WTI) | 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 to Determine Future Cash Flows 24.10
Chicago 3-2-1 Crack Spreads (WTI) | 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 to Determine Future Cash Flows 22.12
Chicago 3-2-1 Crack Spreads (WTI) | 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 to Determine Future Cash Flows 21.70
Chicago 3-2-1 Crack Spreads (WTI) | 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 to Determine Future Cash Flows 21.67