v3.25.4
ENVIRONMENTAL LIABILITIES (Tables)
12 Months Ended
Dec. 31, 2025
Environmental Remediation Obligations [Abstract]  
Summary of Movements in Environmental Liabilities
The following tables show the movements in environmental liabilities for the years ended December 31, 2025 and 2024:
Year ended December 31, 2025 (millions of dollars)
PCBLARTotal
Environmental liabilities - beginning6 41 47 
Expenditures(4)(1)(5)
Revaluation adjustment(1)3 2 
Environmental liabilities - ending1 43 44 
Less: current portion(1)(6)(7)



— 37 37 
Year ended December 31, 2024 (millions of dollars)
PCBLARTotal
Environmental liabilities - beginning39 40 79 
Expenditures(34)(3)(37)
Revaluation adjustment1 4 5 
Environmental liabilities - ending6 41 47 
Less: current portion(6)(5)(11)
— 36 36 
Summary of Estimated Future Environmental Expenditures
As at December 31, 2025, the estimated future environmental expenditures were as follows:
(millions of dollars)
20267 
20276 
20282 
20291 
20302 
Thereafter26 
44