v3.26.1
Supplementary Oil And Gas Information (Unaudited) - Future Net Cash Flows Relating to Proved Crude Oil and Natural Gas Reserves (Details) - CAD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Oil and Gas, Standardized Measure, Discounted Future Net Cash Flow [Line Items]        
Future cash inflows $ 837,741 $ 882,968 $ 870,755  
Future production costs (297,915) (288,515) (279,014)  
Future development costs and asset retirement obligations (95,878) (96,229) (90,415)  
Future income taxes (97,548) (110,342) (113,057)  
Future net cash flows 346,400 387,882 388,269  
10% annual discount for timing of future cash flows (241,412) (275,724) (279,533)  
Standardized measure of future net cash flows (1) 104,988 112,158 108,736 $ 136,998
North America        
Oil and Gas, Standardized Measure, Discounted Future Net Cash Flow [Line Items]        
Future cash inflows 833,999 876,917 863,544  
Future production costs (296,918) (286,440) (276,498)  
Future development costs and asset retirement obligations (94,826) (92,455) (86,615)  
Future income taxes (97,315) (111,073) (113,516)  
Future net cash flows 344,940 386,949 386,915  
10% annual discount for timing of future cash flows (240,827) (275,139) (278,814)  
Standardized measure of future net cash flows (1) 104,113 111,810 108,101  
North Sea        
Oil and Gas, Standardized Measure, Discounted Future Net Cash Flow [Line Items]        
Future cash inflows 0 722 1,067  
Future production costs 0 (414) (636)  
Future development costs and asset retirement obligations 0 (1,970) (1,873)  
Future income taxes 0 1,144 967  
Future net cash flows 0 (518) (475)  
10% annual discount for timing of future cash flows 0 136 168  
Standardized measure of future net cash flows (1) 0 (382) (307)  
Offshore Africa        
Oil and Gas, Standardized Measure, Discounted Future Net Cash Flow [Line Items]        
Future cash inflows 3,742 5,329 6,144  
Future production costs (997) (1,661) (1,880)  
Future development costs and asset retirement obligations (1,052) (1,804) (1,927)  
Future income taxes (233) (413) (508)  
Future net cash flows 1,460 1,451 1,829  
10% annual discount for timing of future cash flows (585) (721) (887)  
Standardized measure of future net cash flows (1) $ 875 $ 730 $ 942