Key audit matters
Key audit matters are those matters that, in our professional judgment,
were of most significance in our
audit of the consolidated financial statements for the year
ended December 31, 2021. These matters were
addressed in the context of our audit of the consolidated
financial statements as a whole, and in forming
our opinion thereon, and we do not provide a separate
opinion on these matters.
Key audit matter
How our audit addressed the key audit matter
Assessment of impairment indicators for the
Company’s mineral properties, plant and
equipment.
Refer to note 2 – Basis of presentation and
summary of significant accounting policies and note
6 – Mineral properties, plant and equipment to the
consolidated financial statements.
The Company’s mineral properties, plant and
equipment carrying value was $5,051 million as at
December 31, 2021, contained in various cash
generating units (CGUs). Management assesses
whether there is an indication that an asset or
group of assets within a CGU may be impaired at
the end of each reporting period. Management
applies significant judgment in assessing whether
indicators of impairment exist for a CGU which
would necessitate impairment testing. Internal and
external factors considered by management
include commodity prices, foreign exchange rates,
capital and production cost forecasts, reserve and
resource quantities and discount rates. When
impairment indicators exist, management estimates
the recoverable amount of the CGU and compares
it against the CGU’s carrying amount. As at
December 31, 2021, management has concluded
that there are no impairment indicators on the
Company’s mineral properties, plant and
equipment.
Our approach to addressing the matter included the
following procedures, among others:
●
Understood management’s process over their
assessment of impairment indicators.
●
Evaluated management’s significant
judgments relating to the existence of
indicators of impairment as at December 31,
2021. This included comparing commodity
prices, foreign exchange rates and discount
rates with external market and industry data,
and assessing that capital and production cost
forecasts are supported by current and past
performance of the CGUs and whether these
assumptions aligned with evidence obtained in
other areas of the audit, as applicable.
●
Evaluated management’s analysis of whether
there was a significant reduction in the reserve
and resource quantities by considering the
most recent reserve and resource estimates
prepared by management’s experts. As a
basis for using this work, the competence,
capabilities and objectivity of management’s
experts was evaluated, the work performed
was understood and the appropriateness of
the work as audit evidence was evaluated.
The procedures performed also included
evaluation of the methods and assumptions
used by management’s experts, and an
evaluation of their findings.