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ASSET RETIREMENT OBLIGATIONS
 12 Months Ended
Dec. 31, 2019
Asset Retirement Obligation Disclosure [Abstract]  
ASSET RETIREMENT OBLIGATIONS  ASSET RETIREMENT OBLIGATIONS
 
Our ARO relate mostly to the retirement of pipelines, renewable power generation assets, obligations related to right-of way agreements and contractual leases for land use.

The liability for the expected cash flows as recognized in the financial statements reflected discount rates ranging from 1.8% to 9.0%.

A reconciliation of movements in our ARO liabilities is as follows:
December 31,
2019

2018

(millions of Canadian dollars)
 
 
Obligations at beginning of year
989

793

Liabilities acquired
—

—

Liabilities disposed
(59
)
(13
)
Liabilities incurred
15

145

Liabilities settled
(12
)
(21
)
Change in estimate and other
(417
)
29

Foreign currency translation adjustment
(18
)
22

Accretion expense
22

34

Obligations at end of year
520

989

Presented as follows:
 
 
Accounts payable and other
7

6

Other long-term liabilities
513

983

 
520

989