127 A class of assets is a grouping of assets of similar nature and use in an entity's operations.
128 The information required in paragraph 126 may be presented with other information disclosed for the class of assets. For example, this information may be included in a reconciliation of the carrying amount of property, plant and equipment, at the beginning and end of the period, as required by IAS 16 Property, Plant and Equipment.
129 An entity that reports segment information in accordance with IAS 14 Segment Reporting shall disclose the following for each reportable segment based on an entity's primary reporting format:
(a) the amount of impairment losses recognised in profit or loss and directly in equity during the period.
(b) the amount of reversals of impairment losses recognised in profit or loss and directly in equity during the period.

130 An entity shall disclose the following for each material impairment loss recognised or reversed during the period for an individual asset, including goodwill, or a cash-generating unit:
(a) the events and circumstances that led to the recognition or reversal of the impairment loss.
(b) the amount of the impairment loss recognised or reversed.
(c) for an individual asset:
(i) the nature of the asset; and
(ii) if the entity reports segment information in accordance with IAS 14, the reportable segment to which the asset belongs, based on the entity's primary reporting format.
(d) for a cash-generating unit:
(i) a description of the cash-generating unit (such as whether it is a product line, a plant, a business operation, a geographical area, or a reportable segment as defined in IAS 14);
(ii) the amount of the impairment loss recognised or reversed by class of assets and, if the entity reports segment information in accordance with IAS 14, by reportable segment based on the entity's primary reporting format; and
(iii) if the aggregation of assets for identifying the cashgenerating unit has changed since the previous estimate of the cash-generating unit's recoverable amount (if any), a description of the current and former way of aggregating assets and the reasons for changing the way the cash-generating unit is identified.
(e) whether the recoverable amount of the asset (cash-generating unit) is its fair value less costs to sell or its value in use.
(f) if recoverable amount is fair value less costs to sell, the basis used to determine fair value less costs to sell (such as whether fair value was determined by reference to an active market).
(g) if recoverable amount is value in use, the discount rate(s) used in the current estimate and previous estimate (if any) of value in use.

131 An entity shall disclose the following information for the aggregate impairment losses and the aggregate reversals of impairment losses recognised during the period for which no information is disclosed in accordance with paragraph 130:
(a) the main classes of assets affected by impairment losses and the main classes of assets affected by reversals of impairment losses.
(b) the main events and circumstances that led to the recognition of these impairment losses and reversals of impairment losses.
132 An entity is encouraged to disclose assumptions used to determine the recoverable amount of assets (cash-generating units) during the period. However, paragraph 134 requires an entity to disclose information about the estimates used to measure the recoverable amount of a cashgenerating unit when goodwill or an intangible asset with an indefinite useful life is included in the carrying amount of that unit.

133 If, in accordance with paragraph 84, any portion of the goodwill acquired in a business combination during the period has not been allocated to a cash-generating unit (group of units) at the reporting date, the amount of the unallocated goodwill shall be disclosed together with the reasons why that amount remains unallocated.
Estimates used to Measure Recoverable Amounts of Cash-generating Units Containing Goodwill or Intangible Assets with Indefinite Useful Lives
134 An entity shall disclose the information required by (a)-(f) for each cash-generating unit (group of units) for which the carrying amount of goodwill or intangible assets with indefinite useful lives allocated to that unit (group of units) is significant in comparison with the entity's total carrying amount of goodwill or intangible assets with indefinite useful lives:
(a) the carrying amount of goodwill allocated to the unit (group of units).
(b) the carrying amount of intangible assets with indefinite useful lives allocated to the unit (group of units).
(c) the basis on which the unit's (group of units') recoverable amount has been determined (ie value in use or fair value less costs to sell).
(d) if the unit's (group of units') recoverable amount is based on value in use:
(i) a description of each key assumption on which management has based its cash flow projections for the period covered by the most recent budgets/forecasts. Key assumptions are those to which the unit's (group of units') recoverable amount is most sensitive.
(ii) a description of management's approach to determining the value(s) assigned to each key assumption, whether those value(s) reflect past experience or, if appropriate, are consistent with external sources of information, and, if not, how and why they differ from past experience or external sources of information.
(iii) the period over which management has projected cash flows based on financial budgets/forecasts approved by management and, when a period greater than five years is used for a cash-generating unit (group of units), an explanation of why that longer period is justified.
(iv) the growth rate used to extrapolate cash flow projections beyond the period covered by the most recent budgets/forecasts, and the justification for using any growth rate that exceeds the long-term average growth rate for the products, industries, or country or countries in which the entity operates, or for the market to which the unit (group of units) is dedicated.
(v) the discount rate(s) applied to the cash flow projections.
(e) if the unit's (group of units') recoverable amount is based on fair value less costs to sell, the methodology used to determine fair value less costs to sell. If fair value less costs to sell is not determined using an observable market price for the unit (group of units), the following information shall also be disclosed:
(i) a description of each key assumption on which management has based its determination of fair value less costs to sell. Key assumptions are those to which the unit's (group of units') recoverable amount is most sensitive.
(ii) a description of management's approach to determining the value(s) assigned to each key assumption, whether those value(s) reflect past experience or, if appropriate, are consistent with external sources of information, and, if not, how and why they differ from past experience or external sources of information.
(f) if a reasonably possible change in a key assumption on which management has based its determination of the unit's (group of units') recoverable amount would cause the unit's (group of units') carrying amount to exceed its recoverable amount:
(i) the amount by which the unit's (group of units') recoverable amount exceeds its carrying amount.
(ii) the value assigned to the key assumption.
(iii) the amount by which the value assigned to the key assumption must change, after incorporating any consequential effects of that change on the other variables used to measure recoverable amount, in order for the unit's (group of units') recoverable amount to be equal to its carrying amount.

135 If some or all of the carrying amount of goodwill or intangible assets with indefinite useful lives is allocated across multiple cash-generating units (groups of units), and the amount so allocated to each unit (group of units) is not significant in comparison with the entity's total carrying amount of goodwill or intangible assets with indefinite useful lives, that fact shall be disclosed, together with the aggregate carrying amount of goodwill or intangible assets with indefinite useful lives allocated to those units (groups of units). In addition, if the recoverable amounts of any of those units (groups of units) are based on the same key assumption(s) and the aggregate carrying amount of goodwill or intangible assets with indefinite useful lives allocated to them is significant in comparison with the entity's total carrying amount of goodwill or intangible assets with indefinite useful lives, an entity shall disclose that fact, together with:
(a) the aggregate carrying amount of goodwill allocated to those units (groups of units).
(b) the aggregate carrying amount of intangible assets with indefinite useful lives allocated to those units (groups of units).
(c) a description of the key assumption(s).
(d) a description of management's approach to determining the value(s) assigned to the key assumption(s), whether those value(s) reflect past experience or, if appropriate, are consistent with external sources of information, and, if not, how and why they differ from past experience or external sources of information.
(e) if a reasonably possible change in the key assumption(s) would cause the aggregate of the units' (groups of units') carrying amounts to exceed the aggregate of their recoverable amounts:
(i) the amount by which the aggregate of the units' (groups of units') recoverable amounts exceeds the aggregate of their carrying amounts.
(ii) the value(s) assigned to the key assumption(s).
(iii) the amount by which the value(s) assigned to the key assumption(s) must change, after incorporating any consequential effects of the change on the other variables used to measure recoverable amount, in order for the aggregate of the units' (groups of units') recoverable amounts to be equal to the aggregate of their carrying amounts.

136 The most recent detailed calculation made in a preceding period of the recoverable amount of a cash-generating unit (group of units) may, in accordance with paragraph 24 or 99, be carried forward and used in the impairment test for that unit (group of units) in the current period provided specified criteria are met. When this is the case, the information for that unit (group of units) that is incorporated into the disclosures required by paragraphs 134 and 135 relate to the carried forward calculation of recoverable amount.
137 Illustrative Example 9 illustrates the disclosures required by paragraphs 134 and 135.
Transitional Provisions and Effective Date

138 If an entity elects in accordance with paragraph 85 of IFRS 3 Business Combinations to apply IFRS 3 from any date before the effective dates set out in paragraphs 78-84 of IFRS 3, it also shall apply this Standard prospectively from that same date.
139 Otherwise, an entity shall apply this Standard:
(a) to goodwill and intangible assets acquired in business combinations for which the agreement date is on or after 31 March 2004; and
(b) to all other assets prospectively from the beginning of the first annual period beginning on or after 31 March 2004.
140 Entities to which paragraph 139 applies are encouraged to apply the requirements of this Standard before the effective dates specified in paragraph 139. However, if an entity applies this Standard before those effective dates, it also shall apply IFRS 3 and IAS 38 Intangible Assets (as revised in 2004) at the same time.

Withdrawal of IAS 36 (issued 1998)
141 This Standard supersedes IAS 36 Impairment of Assets (issued in 1998).

Appendix A Using Present Value Techniques to Measure Value in Use
This appendix is an integral part of the Standard. It provides guidance on the use of present value techniques in measuring value in use. Although the guidance uses the term 'asset', it equally applies to a group of assets forming a cash-generating unit.
The Components of a Present Value Measurement
A1 The following elements together capture the economic differences between assets:
(a) an estimate of the future cash flow, or in more complex cases, series of future cash flows the entity expects to derive from the asset;
(b) expectations about possible variations in the amount or timing of those cash flows;
(c) the time value of money, represented by the current market risk-free rate of interest;
(d) the price for bearing the uncertainty inherent in the asset; and
(e) other, sometimes unidentifiable, factors (such as illiquidity) that market participants would reflect in pricing the future cash flows the entity expects to derive from the asset.
A2 This appendix contrasts two approaches to computing present value, either of which may be used to estimate the value in use of an asset, depending on the circumstances. Under the 'traditional' approach, adjustments for factors (b)-(e) described in paragraph A1 are embedded in the discount rate. Under the 'expected cash flow' approach, factors (b), (d) and (e) cause adjustments in arriving at risk-adjusted expected cash flows. Whichever approach an entity adopts to reflect expectations about possible variations in the amount or timing of future cash flows, the result should be to reflect the expected present value of the future cash flows, ie the weighted average of all possible outcomes.

General Principles
A3 The techniques used to estimate future cash flows and interest rates will vary from one situation to another depending on the circumstances surrounding the asset in question. However, the following general principles govern any application of present value techniques in measuring assets:
(a) interest rates used to discount cash flows should reflect assumptions that are consistent with those inherent in the estimated cash flows. Otherwise, the effect of some assumptions will be double-counted or ignored. For example, a discount rate of 12 per cent might be applied to contractual cash flows of a loan receivable. That rate reflects expectations about future defaults from loans with particular characteristics. That same 12 per cent rate should not be used to discount expected cash flows because those cash flows already reflect assumptions about future defaults.
(b) estimated cash flows and discount rates should be free from both bias and factors unrelated to the asset in question. For example, deliberately understating estimated net cash flows to enhance the apparent future profitability of an asset introduces a bias into the measurement.
(c) estimated cash flows or discount rates should reflect the range of possible outcomes rather than a single most likely, minimum or maximum possible amount.
Traditional and Expected Cash Flow Approaches to Present Value
Traditional Approach