XML 65 R54.htm IDEA: XBRL DOCUMENT v3.22.0.1
Oil and Gas Properties - Additional Information (Details)
 3 Months Ended 6 Months Ended 12 Months Ended
Mar. 31, 2020
CAD ($)
cashGeneratingUnit
Jun. 30, 2021
CAD ($)
cashGeneratingUnit
Dec. 31, 2021
CAD ($)
cashGeneratingUnit
Dec. 31, 2020
CAD ($)
cashGeneratingUnit
Dec. 31, 2019
CAD ($)
Disclosure of detailed information about property, plant and equipment [line items]          
Number of cash generating units | cashGeneratingUnit 6 6 5 6  
Number of cash generating units, with recoverable amounts | cashGeneratingUnit     3    
Reversal of impairment loss recognised in profit or loss   $ 1,100,000,000   $ 341,326,000  
Impairment loss (reversal of impairment loss) recognised in profit or loss   $ 1,126,415,000 $ 416,000,000    
Adjusted inflation for prices and costs subsequent to 2023   0.020 0.020 0.02  
Conventional CGU          
Disclosure of detailed information about property, plant and equipment [line items]          
Reversal of impairment loss recognised in profit or loss       $ 0  
Impairment loss (reversal of impairment loss) recognised in profit or loss   $ 15,000,000 $ 19,000,000    
Conventional, Peace River, Lloydminster, And Duvernay          
Disclosure of detailed information about property, plant and equipment [line items]          
Impairment loss (reversal of impairment loss) recognised in profit or loss       0  
Viking And Eagle Ford Cash Generating Units          
Disclosure of detailed information about property, plant and equipment [line items]          
Reversal of impairment loss recognised in profit or loss       341,300,000  
Oil and gas assets          
Disclosure of detailed information about property, plant and equipment [line items]          
Write-downs (reversals of write downs)     (1,500,000,000) $ 2,200,000,000  
Impairment loss (reversal of impairment loss) recognised in profit or loss     $ 1,542,414,000   $ (2,247,162,000)
Impairment $ (2,600,000,000)        
Oil and gas assets | Minimum          
Disclosure of detailed information about property, plant and equipment [line items]          
Discount rate applied to cash flow projections 8.00% 10.00% 12.00% 10.00%  
Oil and gas assets | Maximum          
Disclosure of detailed information about property, plant and equipment [line items]          
Discount rate applied to cash flow projections 14.00% 16.00% 19.00% 17.00%  
Oil and gas assets | Accumulated depreciation          
Disclosure of detailed information about property, plant and equipment [line items]          
Impairment loss (reversal of impairment loss) recognised in profit or loss     $ 1,542,414,000 $ (2,247,162,000)