Items of property, plant and equipment are recorded at their acquisition or production cost net of any investment grants received, less cumulative depreciation and impairment losses. They are not remeasured. They also include concession operating assets not controlled by the grantor but necessary for operation of the concession: buildings intended for operational use, signage and data transmission equipment, vehicles and other equipment.
Depreciation is generally calculated on a straight-line basis over the period of use of the asset. Accelerated depreciation may sometimes be used when it appears more appropriate to the conditions under which the asset is used.
For certain complex assets comprising several components, each component of the asset is depreciated over its own period of use. To reflect the consumption of economic benefits associated with the asset, quarries are depreciated as materials are extracted (volumes extracted during the period are compared with the estimated total volume of deposits to be extracted from the quarry over its useful life).
Investment property is property held to earn rentals or for capital appreciation. It is recorded at its acquisition cost less cumulative depreciation and any impairment losses.
The main periods of use of the various categories of items of property, plant and equipment are as follows:
| Constructions: | |
|---|---|
| – Structure | Between 20 and 50 years |
| – General technical installations | Between 5 and 20 years |
| Site equipment and technical installations | Between 3 and 12 years |
| Vehicles | Between 3 and 5 years |
| Fixtures and fittings | Between 8 and 10 years |
| Office furniture and equipment | Between 3 and 10 years |
Depreciation commences as from the date when the asset is ready to enter service.
Right-of-use assets under leases are amortised on a straight-line basis over the lease term, and adjusted when the lease liability is remeasured.
