XML 55 R37.htm IDEA: XBRL DOCUMENT v3.25.0.1
Asset Retirement Obligations
 12 Months Ended
Dec. 31, 2024
Asset Retirement Obligations [Abstract]  
Asset Retirement Obligations
27. ASSET RETIREMENT OBLIGATIONS
AROs mostly relate to reclamation of land at the thermal, hydro
 
and combustion turbine sites; and the
disposal of polychlorinated biphenyls in transmission and distribution
 
equipment and a pipeline site.
Certain hydro, transmission and distribution assets may have additional
 
AROs that cannot be measured
as these assets are expected to be used for an indefinite
 
period and, as a result, a reasonable estimate of
the FV of any related ARO cannot be made.
The change in ARO for the years ended December 31
 
is as follows:
millions of dollars
2024
2023
Balance, January 1
$
 
192
$
 
174
Additions
 
11
-
 
Accretion included in depreciation expense
 
10
 
9
Change in FX rate
 
5
(1)
Revisions in estimated cash flows
 
2
-
 
Accretion deferred to regulatory asset (included in PP&E)
-
 
 
18
Classified as assets held for sale
 
(1)
(1)
-
 
Liabilities settled
(2)
(8)
Balance, December 31
$
 
217
$
 
192
(1) As at December 31, 2024, NMGC's assets
 
and liabilities were classified as held for
 
sale. For further details on the pending
transaction, refer to note 4.