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14Leases continued

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The Group leases a number of assets as part of its activities. These primarily include corporate office buildings in Sandton and Houston, rail yard, rail cars, retail convenience centres and storage facilities. Lease terms are negotiated on an individual basis and contain a wide range of different terms and conditions.

Areas of judgement:

Various factors are considered in assessing whether an arrangement contains a lease including whether a service contract includes the implicit right to substantially all of the economic benefits from assets used in providing the service and whether the Group directs how and for what purpose such assets are used. In performing this assessment, the Group considers decision-making rights that will affect the economic benefits that will be derived from the use of the asset such as changing the type, timing, or quantity of output that is produced by the asset.

Incorporating optional lease periods where there is reasonable certainty that the option will be extended is subject to judgement and has an impact on the measurement of the lease liability and related right of use asset. Management considers all facts and circumstances that create an economic incentive to exercise an extension option, or not exercise a termination option, including consideration of the significance of the underlying asset to the operations and the expected remaining useful life of the operation where the leased asset is used.

The incremental borrowing rate that the Group applies is the rate that the Group would have to pay to borrow the funds necessary to obtain an asset of similar value to the right of use asset in a similar economic environment with similar terms, security and conditions. The estimation of the incremental borrowing rate is determined for each lease contract using the risk-free rate over a term matching that of the lease, adjusted for other factors such as the credit rating of the lessee, a country risk premium and the borrowing currency. A higher incremental borrowing rate would lead to the recognition of a lower lease liability and corresponding right of use asset.

The range of incremental borrowing rates of lease contracts entered into during the year are as follows:

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Accounting policies:

At contract inception all arrangements are assessed to determine whether it is, or contains, a lease. At the commencement date of the lease, the Group recognises lease liabilities measured at the present value of lease payments to be made over the lease term. The lease payments include:

Variable lease payments that do not depend on an index or a rate are recognised as expenses (unless they are capitalised as part of the cost of inventories or assets under construction) in the period in which the event or condition that triggers the payment occurs.

In calculating the present value of lease payments, the Group uses its incremental borrowing rate at the lease commencement date because the interest rate implicit in the lease is generally not readily determinable. The incremental borrowing rate is the rate that the Group would have to pay to borrow the funds necessary to obtain an asset of similar value to the right of use asset in a similar economic environment with similar terms, security and conditions.

After the commencement date, finance cost is charged to profit or loss over the lease period so as to produce a constant periodic rate of interest on the remaining balance of the liability for each period.

The carrying amount of lease liabilities is remeasured if there is a modification, a change in the lease term, a change in the lease payments (e.g., changes to future payments resulting from a change in an index or rate used to determine such lease payments) or a change in the assessment of an option to purchase the underlying asset.

The Group applies the recognition exemptions to short-term leases (i.e., those leases that have a lease term of 12 months or less from the commencement date and do not contain a purchase option) and leases of assets that are considered to be low value. Lease payments on short-term leases and leases of low-value assets are recognised as expenses over the lease term.

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Right of use assets are measured at cost, less any accumulated depreciation and impairment losses, and adjusted for any remeasurement of lease liabilities. The cost of right of use assets includes:

Right of use assets are generally depreciated over the shorter of the asset’s useful life and the lease term on a straight-line basis. If the Group is reasonably certain to exercise a purchase option, the right of use asset is depreciated over the underlying asset’s useful life. The depreciation charge is recognised in the income statement unless it is capitalised as part of the cost of inventories or assets under construction.

The right of use assets are also subject to impairment. Refer to the accounting policies in note 8 on Remeasurement items affecting profit or loss.

Where the Group transfers control of an asset to another entity (buyer-lessor) and leases that same asset back from the buyer-lessor, the Group derecognises the underlying asset and recognises a right-of-use asset at the proportion of the previous carrying amount of the transferred asset that relates to the right of use retained by the Group. The Group also recognises a lease liability measured at the present value of all expected future lease payments with the resulting gain or loss being included in remeasurement items.