XML 120 R83.htm IDEA: XBRL DOCUMENT v3.25.0.1
Acquisitions and Divestitures - Additional information (Detail)
$ in Millions, $ in Millions
 12 Months Ended
Feb. 28, 2023
CAD ($)
Dec. 31, 2024
CAD ($)
Dec. 31, 2023
CAD ($)
Feb. 28, 2023
USD ($)
Disclosure of detailed information about business combination [line items]        
Before-tax gain on disposal [1]   $ 119 $ (20)  
Conventional        
Disclosure of detailed information about business combination [line items]        
Before-tax gain on disposal   51    
After-tax gain on disposal   39    
Proceeds from disposal of oil and gas assets   39    
Duvernay Energy Corporation        
Disclosure of detailed information about business combination [line items]        
Fair value of non-monetary assets contributed to joint venture   94    
Other cash payments to acquire interests in joint ventures, classified as investing activities   $ 18    
Proportion of ownership interest in joint venture   30.00%    
Investments in joint ventures accounted for using equity method   $ 84    
Before-tax gain on disposal   65    
After-tax gain on disposal   $ 50    
BP-Husky Refining LLC        
Disclosure of detailed information about business combination [line items]        
Agreement to purchase remaining ownership 50.00%      
Total Purchase Consideration $ 514     $ 378
Fair Value of Pre-Existing 50 Percent Ownership Interest in Toledo 508      
Carrying value of investment in joint ventures recognised​ as of​ acquisition​ date 554      
Non-cash revaluation loss, before tax 34      
Non-cash revaluation loss, after tax 23      
Non-cash revaluation loss, cumulative foreign exchange $ 12      
Toledo CGU        
Disclosure of detailed information about business combination [line items]        
Acquisition-related costs for transaction recognised separately from acquisition of assets and assumption of liabilities in business combination     $ 11  
[1]
(1)Revised presentation as of January 1, 2024. See Note 4.