(8a) Assets in ownership
Items of property, plant and equipment are measured at cost or estimated cost less accumulated depreciation (see below) and impairments. The cost includes costs that can be directly allocated to the acquisition of the asset.
(8b) Expenses after initial recognition
The Group includes the cost of replacing part of an asset in the carrying amount of items of property, plant and equipment when the cost is incurred. This occurs if it is likely that the future economic benefits of the asset will accrue to the Group and the cost of the asset can be reliably determined. All other expenses are taken to the statement of profit or loss when these are incurred.
(8c) Depreciation of property, plant and equipment
Depreciation is recognised in the statement of profit or loss using the straight-line method over the estimated useful life of each part of an item of property, plant or equipment. The residual values are reassessed on an annual basis. Depreciation is not applied to land. The estimated useful lives are as follows:
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Buildings: main load-bearing structures and roofs: 30 years
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Buildings: technical equipment: 15 years
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Buildings: interior walls: 10 years
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Office equipment: 3-10 years
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Machines: 5-10 years
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Installations: 5-10 years
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Large-scale equipment and other capital assets: 3-10 years