v3.26.1
Other Long-Term Assets - Schedule of Assets, Liabilities, Partners' Equity and Equity (Loss) Income (Details) - CAD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of joint ventures [line items]      
Current assets $ 7,664 $ 7,405  
Current liabilities 8,063 9,631  
Partners' equity 44,366 39,468 $ 39,832
Revenue 44,167 41,509 40,835
Net income 10,820 6,106 8,233
Depletion, depreciation and amortization [1] 9,384 6,681 6,413
Interest and other financing expense 834 592 $ 636
North West Redwater Partnership      
Disclosure of joint ventures [line items]      
Partners' equity $ (496) (509)  
Partners' equity at Company's 50% interest 50.00%    
Revenue $ 315 325  
Percent of pro rata share of debt company has committed paying to joint venture, toll payer percent 25.00%    
North West Redwater Partnership      
Disclosure of joint ventures [line items]      
Current assets $ 493 535  
Non-current assets 10,298 10,286  
Current liabilities 2,953 2,082  
Non-current liabilities 8,829 9,757  
Partners' equity (991) (1,018)  
Revenue 1,365 1,490  
Net income 26 92  
Depletion, depreciation and amortization 265 346  
Interest and other financing expense $ 457 $ 502  
[1] Depletion, depreciation and amortization expense for the year ended December 31, 2025 includes a $1,462 million (2024 – $160 million; 2023 – $436 million) non-cash recoverability charge for revisions to abandonment and decommissioning costs in the North Sea, a $269 million non-cash recoverability charge related to the decision to not pursue an extension of the Company's Production Sharing Contract ("PSC") for the Espoir field in Offshore Africa, and a $46 million non-cash derecognition of exploration and evaluation assets related to the decision to not pursue development of Kossipo in Offshore Africa (notes 5 and 6).