v3.26.3
LEASES - Schedule of Right of Use Assets, Net (Details)
$ in Millions
 9 Months Ended
Sep. 30, 2026
CAD ($)
Disclosure of quantitative information about right-of-use assets [line items]  
Balance at beginning of period $ 2,153
Balance at end of period 1,992
COST  
Disclosure of quantitative information about right-of-use assets [line items]  
Balance at beginning of period 3,516
Additions 44
Modifications 28
Divestitures (2)
Exchange Rate Movements and Other (1)
Balance at end of period 3,585
ACCUMULATED DEPRECIATION  
Disclosure of quantitative information about right-of-use assets [line items]  
Balance at beginning of period 1,363
Depreciation 241
Exchange Rate Movements and Other (11)
Balance at end of period 1,593
Real Estate  
Disclosure of quantitative information about right-of-use assets [line items]  
Balance at beginning of period 388
Balance at end of period 349
Real Estate | COST  
Disclosure of quantitative information about right-of-use assets [line items]  
Balance at beginning of period 611
Additions 4
Modifications 1
Divestitures 0
Exchange Rate Movements and Other (37)
Balance at end of period 579
Real Estate | ACCUMULATED DEPRECIATION  
Disclosure of quantitative information about right-of-use assets [line items]  
Balance at beginning of period 223
Depreciation 27
Exchange Rate Movements and Other (20)
Balance at end of period 230
Transportation And Storage Assets  
Disclosure of quantitative information about right-of-use assets [line items]  
Balance at beginning of period 1,658
Balance at end of period 1,548
Transportation And Storage Assets | COST  
Disclosure of quantitative information about right-of-use assets [line items]  
Balance at beginning of period 2,635
Additions 28
Modifications 27
Divestitures 0
Exchange Rate Movements and Other 39
Balance at end of period 2,729
Transportation And Storage Assets | ACCUMULATED DEPRECIATION  
Disclosure of quantitative information about right-of-use assets [line items]  
Balance at beginning of period 977
Depreciation 188
Exchange Rate Movements and Other 16
Balance at end of period 1,181
Refining Assets  
Disclosure of quantitative information about right-of-use assets [line items]  
Balance at beginning of period 56
Balance at end of period 52
Refining Assets | COST  
Disclosure of quantitative information about right-of-use assets [line items]  
Balance at beginning of period 148
Additions 0
Modifications 0
Divestitures 0
Exchange Rate Movements and Other 6
Balance at end of period 154
Refining Assets | ACCUMULATED DEPRECIATION  
Disclosure of quantitative information about right-of-use assets [line items]  
Balance at beginning of period 92
Depreciation 6
Exchange Rate Movements and Other 4
Balance at end of period 102
Other Assets  
Disclosure of quantitative information about right-of-use assets [line items]  
Balance at beginning of period 51
Balance at end of period 43
Other Assets | COST  
Disclosure of quantitative information about right-of-use assets [line items]  
Balance at beginning of period 122
Additions 12
Modifications 0
Divestitures (2)
Exchange Rate Movements and Other (9)
Balance at end of period 123
Other Assets | ACCUMULATED DEPRECIATION  
Disclosure of quantitative information about right-of-use assets [line items]  
Balance at beginning of period 71
Depreciation 20
Exchange Rate Movements and Other (11)
Balance at end of period $ 80