XML 87 R60.htm IDEA: XBRL DOCUMENT v3.20.1
Exploration and Evaluation Assets - Narrative (Details)
$ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2019
CAD ($)
Dec. 31, 2018
USD ($)
agreement
Dec. 31, 2018
CAD ($)
agreement
Dec. 31, 2017
CAD ($)
Jun. 27, 2019
CAD ($)
Disclosure Of Detailed Information About Exploration For And Evaluation Of Mineral Resources [Line Items]          
Disposals of exploration and evaluation assets     $ 100    
Proceeds from disposal of exploration and evaluation assets $ 0   $ 16 $ 35  
Farm-out agreements, working interest retained   20.00% 20.00%    
Oil Sands Mining and Upgrading          
Disclosure Of Detailed Information About Exploration For And Evaluation Of Mineral Resources [Line Items]          
Disposals of exploration and evaluation assets     $ 7    
North America          
Disclosure Of Detailed Information About Exploration For And Evaluation Of Mineral Resources [Line Items]          
Exploration and evaluation assets       27  
Asset retirement obligations $ 20   13 63  
Disposals of exploration and evaluation assets     4 1  
Proceeds from disposal of exploration and evaluation assets       36  
Gain on sale of exploration and evaluation assets     $ 16 $ 35  
Offshore Africa          
Disclosure Of Detailed Information About Exploration For And Evaluation Of Mineral Resources [Line Items]          
Number of farm-out agreements | agreement   2 2    
Disposals of exploration and evaluation assets     $ 89    
Devon          
Disclosure Of Detailed Information About Exploration For And Evaluation Of Mineral Resources [Line Items]          
Total purchase consideration         $ 3,412
Exploration and evaluation assets         91
Property, plant and equipment         3,325
Asset retirement obligations         $ 178
Laricina Energy Ltd | North America          
Disclosure Of Detailed Information About Exploration For And Evaluation Of Mineral Resources [Line Items]          
Total purchase consideration     46    
Exploration and evaluation assets     118    
Property, plant and equipment     44    
Cash     24    
Deferred tax assets recognised as of acquisition date     168    
Net working capital liabilities recognised as of acquisition date     18    
Asset retirement obligations     17    
Notes payable recognised as of acquisition date     48    
Gain recognised on acquisition, pre-tax     $ 225    
Farm-Out Agreements, Offshore Africa | Offshore Africa          
Disclosure Of Detailed Information About Exploration For And Evaluation Of Mineral Resources [Line Items]          
Farm-out agreements, working interest disposed   30.00% 30.00%    
Disposals of exploration and evaluation assets     $ 89    
Disposals of exploration and evaluation assets, costs incurred in past fiscal year recovered     14    
Proceeds from disposal of exploration and evaluation assets   $ 79 105    
Gain recognised on farm-out, pre-tax     16    
Gain recognised on farm-out, after-tax     12    
Joslyn Oil Sands Project | Oil Sands Mining and Upgrading          
Disclosure Of Detailed Information About Exploration For And Evaluation Of Mineral Resources [Line Items]          
Asset acquisition, exploration and evaluation assets     222    
Asset acquisition, asset retirement obligations     4    
Asset acquisition, total purchase consideration     218    
Asset acquisition, cash transferred     $ 100