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Other long-term obligations
 9 Months Ended
Sep. 30, 2025
Other Liabilities Disclosure [Abstract]  
Other long-term obligations Other long-term obligations
 
As at
Sep 30
As at
Dec 31
millions of Canadian dollars2025 2024 
Employee retirement benefits (a)
836 846 
Asset retirement obligations and other environmental liabilities (b)
2,624 2,641 
Share-based incentive compensation liabilities
270 119 
Operating lease liability (c)
132 144 
Other obligations (note 11)
315 120 
Total other long-term obligations4,177 3,870 
(a)Total recorded employee retirement benefits obligations also included $61 million in current liabilities (2024 - $61 million).
(b)Total asset retirement obligations and other environmental liabilities also included $291 million in current liabilities (2024 - $291 million).
(c)Total operating lease liability also included $95 million in current liabilities (2024 - $100 million). In addition to the total operating lease liability, undiscounted commitments for leases not yet commenced totaled $87 million (2024 - $56 million).