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Other long-term obligations
 3 Months Ended
Mar. 31, 2024
Other Liabilities Disclosure [Abstract]  
Other long-term obligations Other long-term obligations
 
As at
Mar 31
As at
Dec 31
millions of Canadian dollars2024 2023 
Employee retirement benefits (a)
932 954 
Asset retirement obligations and other environmental liabilities (b)
2,575 2,564 
Share-based incentive compensation liabilities
128 90 
Operating lease liability (c)
107 111 
Other obligations
118 132 
Total other long-term obligations3,860 3,851 
(a)Total recorded employee retirement benefits obligations also included $62 million in current liabilities (2023 - $62 million).
(b)Total asset retirement obligations and other environmental liabilities also included $235 million in current liabilities (2023 - $235 million).
(c)Total operating lease liability also included $77 million in current liabilities (2023 - $87 million). In addition to the total operating lease liability, undiscounted commitments for leases not yet commenced totalled $56 million (2023 - $54 million).