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Property, Plant and Equipment - Narrative (Details) - CAD ($)
 1 Months Ended 11 Months Ended 12 Months Ended
Dec. 31, 2024
Dec. 05, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of detailed information about property, plant and equipment [line items]          
Revenue     $ 35,656,000,000 $ 35,968,000,000 $ 42,298,000,000
Revenue net of blending, production, transportation, and feedstock expense     17,579,000,000    
Chevron Canada Limited          
Disclosure of detailed information about property, plant and equipment [line items]          
Total purchase consideration $ 9,163,000,000   9,163,000,000    
Revenue of acquiree since acquisition date 222,000,000        
Revenue net of blending, production, transportation, and feedstock expense since acquisition date 109,000,000        
Earnings before tax, including interest expense, depletion, depreciation and amortization since acquisition date 23,000,000        
Proforma revenue   $ 2,700,000,000      
Pro forma operating income   1,475,000,000      
Pro forma earnings before tax, including interest expense, depletion, depreciation and amortization   $ 570,000,000      
Asset retirement obligations $ 173,000,000   $ 173,000,000    
Chevron Canada Limited, Operated Working Interest, Duvernay Asset Play in Alberta          
Disclosure of detailed information about property, plant and equipment [line items]          
Interest acquired 70.00%   70.00%    
Chevron Canada Limited, Working Interest, AOSP          
Disclosure of detailed information about property, plant and equipment [line items]          
Interest acquired 20.00%   20.00%    
Chevron Canada Limited, Direct and Indirect Working Interest, AOSP          
Disclosure of detailed information about property, plant and equipment [line items]          
Interest acquired 90.00%   90.00%    
Non Revolving Term Credit Facility          
Disclosure of detailed information about property, plant and equipment [line items]          
Maximum credit facility $ 4,000,000,000   $ 4,000,000,000    
North America Exploration And Production segment - Crude Oil And Natural Gas Properties          
Disclosure of detailed information about property, plant and equipment [line items]          
Total purchase consideration         513,000,000
Asset retirement obligations         11,000,000
Lease liabilities         0
Gains on acquisitions of property, plant and equipment, pre-tax         $ 0
Oil Sands Mining and Upgrading          
Disclosure of detailed information about property, plant and equipment [line items]          
Project costs not subject to depletion and depreciation $ 272,000,000   $ 272,000,000 $ 191,000,000