v3.25.4
Leases - Schedule Of Operating Leases and Finance Leases Recorded In Balance Sheet (Detail) - CAD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Right of use assets    
Operating leases $ 285 $ 240
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Other assets, including intangibles - net Other assets, including intangibles - net
Finance leases $ 582 $ 579
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration] Property, plant and equipment, less accumulated depreciation and depletion Property, plant and equipment, less accumulated depreciation and depletion
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration] Accounts Payable and Accrued Liabilities, Current Accounts Payable and Accrued Liabilities, Current
Lease liability due within one year    
Operating leases $ 87 $ 100
Finance leases 19 18
Long-term lease liability    
Operating leases 149 144
Finance leases $ 531 $ 545
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] Long-term debt, Other long-term obligations Long-term debt, Other long-term obligations
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration] Other long-term obligations Other long-term obligations
Total lease liability, Operating leases $ 236 $ 244
Total lease liability, Finance leases $ 550 $ 563
Weighted average remaining lease term (years), Operating leases 5 years 5 years
Weighted average remaining lease term (years), Finance leases 35 years 35 years
Weighted average discount rate (percent), Operating leases 3.20% 4.10%
Weighted average discount rate (percent), Finance leases 5.80% 4.80%
Included in Accounts payable and accrued liabilities    
Lease liability due within one year    
Finance leases $ 0 $ 0
Included in Notes and loans payable    
Lease liability due within one year    
Finance leases 19 18
Included in Other long-term obligations    
Long-term lease liability    
Finance leases 0 0
Included in Long-term debt    
Long-term lease liability    
Finance leases $ 531 $ 545