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Long-term provisions (Tables) | 12 Months Ended
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Jun. 30, 2021
Long-term provisions |
Schedule of changes in long-term provisions | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Share- | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | Environ- | ​ | based | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | mental | ​ | payments | ​ | Other | ​ | Total | ​
for the year ended 30 June |  |  | Rm |  | Rm |  | Rm |  | Rm | ​
Balance at beginning of year | ​ | ​ | 21 790 | ​ | 51 | ​ | 1 064 | ​ | 22 905 |
Capitalised to property, plant and equipment* | ​ | ​ | (2 425) | ​ | — | ​ | — | ​ | (2 425) |
Reduction in rehabilitation provision capitalised |  | ​ | 77 |  | — |  | — |  | 77 | ​
Transfer to held for sale liabilities** |  | ​ | (1 310) |  | — |  | — |  | (1 310) | ​
Per the income statement |  | ​ | (293) |  | (22) |  | 312 |  | (3) | ​
additional provisions and changes to existing provisions |  | ​ | 412 |  | (22) |  | 313 |  | 703 | ​
reversal of unutilised amounts |  | ​ | (31) |  | — |  | (1) |  | (32) | ​
effect of change in discount rate |  | ​ | (674) |  | — |  | — |  | (674) | ​
Notional interest |  | ​ | 664 |  | — |  | 4 |  | 668 | ​
Utilised during year (cash flow) |  | ​ | (271) |  | — |  | (117) |  | (388) | ​
Foreign exchange differences recognised in income statement |  | ​ | (1 495) |  | 1 |  | (18) |  | (1 512) | ​
Translation of foreign operations |  | ​ | (541) |  | (1) |  | (109) |  | (651) | ​
Balance at end of year |  | ​ | 16 196 |  | 29 |  | 1 136 |  | 17 361 | ​
| * | Decrease in rehabilitation provision capitalised in 2021 relates to a reassessment of the provision based on discount rates and cost estimates.
| ** | Relates to rehabilitation provisions of the Canadian shale gas assets classified as held for sale, refer note 12 and the Gabon oil producing assets that were disposed of during the year.
Schedule of expected timing of future cash flows for provisions | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | 2021 | ​ | 2020 |
for the year ended 30 June |  | Note |  | Rm |  | Rm |
Expected timing of future cash flows | ​ | ​ |  | ​ |  | ​ | ​
Within one year | ​ | ​ |  | 1 197 |  | 1 048 | ​
One to five years | ​ | ​ |  | 5 287 |  | 5 324 | ​
More than five years | ​ | ​ |  | 10 877 |  | 16 533 | ​
​ | ​ | ​ |  | 17 361 |  | 22 905 | ​
Short-term portion |  | 34 |  | (1 197) |  | (1 048) | ​
Long-term provisions | ​ | ​ |  | 16 164 |  | 21 857 | ​
Estimated undiscounted obligation* | ​ | ​ |  | 92 109 |  | 96 033 | ​
​ *Decrease relates mainly to Canada which was classified as held for sale at 30 June 2021 and the Gabon oil producing assets that were disposed of during the year.
Summary of risk-free rates used to discount the estimated cash flows related to provisions | ​
​ | ​ | ​ | ​ | ​
​ | ​ | 2021 | ​ | 2020
for the year ended 30 June |  | % |  | %
South Africa |  | 4,2 to 10,3 |  | 3,6 to 9,4
Europe |  | 0,0 to 0,5 |  | —
United States of America |  | 0,2 to 1,8 |  | 0,2 to 0,9
Canada |  | 0,5 to 2,3 |  | 0,5 to 1,4
Schedule of effect on provisions from changes in the discount rate | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ |  | 2021 | ​ | 2020 |
for the year ended 30 June |  | ​ | Rm |  | Rm |
A 1% point change in the discount rate would have the following effect on the long-term provisions recognised |  | ​ |  |  |  | ​
Increase in the discount rate |  | ​ | (4 352) |  | (3 836) | ​
amount capitalised to property, plant and equipment |  | ​ | (1 250) |  | (2 767) | ​
income recognised in income statement |  | ​ | (3 102) |  | (1 069) | ​
Decrease in the discount rate |  | ​ | 5 266 |  | 4 297 | ​
amount capitalised to property, plant and equipment |  | ​ | 1 787 |  | 3 115 | ​
expense recognised in income statement |  | ​ | 3 479 |  | 1 182 | ​

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