XML 50 R27.htm IDEA: XBRL DOCUMENT v3.25.0.1
ASSET RETIREMENT OBLIGATIONS
 12 Months Ended
Dec. 31, 2024
Asset Retirement Obligation Disclosure [Abstract]  
ASSET RETIREMENT OBLIGATIONS ASSET RETIREMENT OBLIGATIONS
Our ARO relate mostly to the retirement of pipelines, renewable power generation assets, oil and gas wells and production facilities, and obligations related to right-of way agreements and contractual leases for land use.

The discount rates used to estimate the present value of the expected future cash flows for the years ended December 31, 2024 and 2023 ranged from 1.5% to 9.0%.

A reconciliation of movements in our ARO liabilities is as follows:

December 31,20242023
(millions of Canadian dollars)
Obligations at beginning of year
493 488 
Liabilities acquired
185 1 
Liabilities incurred
3 — 
Liabilities settled
(139)(23)
Change in estimate and other
51 5 
Foreign currency translation adjustment
40 (6)
Accretion expense
33 28 
Obligations at end of year
666 493 
Presented as follows:
Other current liabilities (Note 16)
120 136 
Other long-term liabilities
546 357 
666 493