v3.26.1
Supplementary Oil And Gas Information (Unaudited) - Capitalized Costs Related to Crude Oil and Natural Gas Activities (Details) - CAD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Capitalized Costs Relating To Oil And Gas Producing Activities, By Geographic Area1 [Line Items]      
Proved properties $ 168,052 $ 161,063 $ 145,873
Unproved properties 2,651 2,526 2,208
Capitalized costs, gross 170,703 163,589 148,081
Net capitalized costs 79,841 75,537 66,396
Oil and gas assets      
Capitalized Costs Relating To Oil And Gas Producing Activities, By Geographic Area1 [Line Items]      
Less: accumulated depletion and depreciation (90,862) (88,052) (81,685)
North America      
Capitalized Costs Relating To Oil And Gas Producing Activities, By Geographic Area1 [Line Items]      
Proved properties 153,466 146,309 132,858
Unproved properties 2,651 2,478 2,108
Capitalized costs, gross 156,117 148,787 134,966
Net capitalized costs 78,560 74,012 65,021
North America | Oil and gas assets      
Capitalized Costs Relating To Oil And Gas Producing Activities, By Geographic Area1 [Line Items]      
Less: accumulated depletion and depreciation (77,557) (74,775) (69,945)
North Sea      
Capitalized Costs Relating To Oil And Gas Producing Activities, By Geographic Area1 [Line Items]      
Proved properties 9,270 9,731 8,606
Unproved properties 0 0 0
Capitalized costs, gross 9,270 9,731 8,606
Net capitalized costs 0 339 224
North Sea | Oil and gas assets      
Capitalized Costs Relating To Oil And Gas Producing Activities, By Geographic Area1 [Line Items]      
Less: accumulated depletion and depreciation (9,270) (9,392) (8,382)
Offshore Africa      
Capitalized Costs Relating To Oil And Gas Producing Activities, By Geographic Area1 [Line Items]      
Proved properties 5,316 5,023 4,409
Unproved properties 0 48 100
Capitalized costs, gross 5,316 5,071 4,509
Net capitalized costs 1,281 1,186 1,151
Offshore Africa | Oil and gas assets      
Capitalized Costs Relating To Oil And Gas Producing Activities, By Geographic Area1 [Line Items]      
Less: accumulated depletion and depreciation $ (4,035) $ (3,885) $ (3,358)