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Short-term provisions | 12 Months Ended
--- | ---
Jun. 30, 2018
Short-term provisions |
Short-term provisions | 32 Short-term provisions
|  |  |  | 2018 |  | 2017 |
for the year ended 30 June |  | Note |  | Rm |  | Rm |
Other provisions |  |  |  | 552 |  | 522 |
Short-term portion of |  |  |  |  |  |  |
long-term provisions |  | 31 |  | 2 567 |  | 2 131 |
post-retirement benefit obligations |  | 33 |  | 389 |  | 354 |
|  |  |  | 3 508 |  | 3 007 |
Accounting policies: Long-term provisions are determined by discounting the expected future cash flows using a pre-tax discount rate to their present value. The increase in discounted long-term provisions as a result of the passage of time is recognised as a finance expense in the income statement. Estimated long-term environmental provisions, comprising pollution control, rehabilitation and mine closure, are based on the group’s environmental policy taking into account current technological, environmental and regulatory requirements. The provision for rehabilitation is recognised as and when the environmental liability arises. To the extent that the obligations relate to the construction of an asset, they are capitalised as part of the cost of those assets. The effect of subsequent changes to assumptions in estimating an obligation for which the provision was recognised as part of the cost of the asset is adjusted against the asset. Any subsequent changes to an obligation which did not relate to the initial construction of a related asset are charged to the income statement. The estimated present value of future decommissioning costs, taking into account current environmental and regulatory requirements, is capitalised as part of property, plant and equipment, to the extent that they relate to the construction of the asset, and the related provisions are raised. These estimates are reviewed at least annually. Deferred tax is recognised on the temporary differences in relation to both the asset to which the obligation relates to and rehabilitation provision. Termination benefits are recognised as a liability at the earlier of the date of recognition of restructuring costs or when the group is demonstrably committed, without realistic possibility of withdrawal, to a formal detailed plan to either terminate employment before normal retirement date, or to provide termination benefits as a result of an offer made to encourage voluntary redundancy. In the case of an offer to encourage voluntary redundancy, the termination benefits are measured based on the number of employees expected to accept the offer. Benefits that are expected to be wholly settled more than 12 months after the end of the reporting period are discounted to their present value. Areas of judgement: The determination of long-term provisions, in particular environmental provisions, remains a key area where management’s judgement is required. Estimating the future cost of these obligations is complex and requires management to make estimates and judgements because most of the obligations will only be fulfilled in the future and contracts and laws are often not clear regarding what is required. The resulting provisions could also be influenced by changing technologies and political, environmental, safety, business and statutory considerations. It is envisaged that, based on the current information available, any additional liability in excess of the amounts provided will not have a material adverse effect on the group’s financial position, liquidity or cash flow.

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