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Borrowings - Disclosure of Interest Bearing Borrowings (Details) | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
Jun. 30, 2019 ZAR (R) | Jun. 30, 2018 ZAR (R) | Jun. 30, 2019 USD ($) | Nov. 30, 2018 ZAR (R) | Jul. 31, 2018 USD ($) | Oct. 31, 2017 USD ($) | Jul. 31, 2017 USD ($) | Jun. 30, 2017 ZAR (R)
Non-current borrowings |  |  |  |  |  |  |  |
Balance at beginning of year | R 4,924,000,000 |  |  |  |  |  |  |
Total non-current borrowings | 5,826,000,000 | R 4,924,000,000 |  |  |  |  |  |
Current borrowings |  |  |  |  |  |  |  |
Balance at beginning of year | 690,000,000 |  |  |  |  |  |  |
Total current borrowings | 89,000,000 | 690,000,000 |  |  |  |  |  |
Total interest-bearing borrowings | 5,915,000,000 | 5,614,000,000 |  |  |  |  |  |
Undrawn committed borrowing facilities | 1,277,000,000 | 845,000,000 |  |  |  |  |  | R 2,142,000,000
R1 billion revolving credit facility |  |  |  |  |  |  |  |
Non-current borrowings |  |  |  |  |  |  |  |
Maximum borrowing capacity | 1,000,000,000 |  |  |  |  |  |  |
Balance at beginning of year | 497,000,000 | 299,000,000 |  |  |  |  |  |
Draw down | 500,000,000 | 500,000,000 |  |  |  |  |  |
Repayments | 0 | (300,000,000) |  |  |  |  |  |
Refinancing | (997,000,000) | 0 |  |  |  |  |  |
Issue cost | 0 | (2,000,000) |  |  |  |  |  |
Total non-current borrowings | 0 | 497,000,000 |  |  |  |  |  |
Current borrowings |  |  |  |  |  |  |  |
Balance at beginning of year | 3,000,000 | 3,000,000 |  |  |  |  |  |
Refinancing | (3,000,000) | 0 |  |  |  |  |  |
Total current borrowings | 0 | 3,000,000 |  |  |  |  |  |
R2 billion facility |  |  |  |  |  |  |  |
Non-current borrowings |  |  |  |  |  |  |  |
Maximum borrowing capacity | 2,000,000,000 |  |  | R 2,000,000,000 |  |  |  |
Balance at beginning of year | 0 |  |  |  |  |  |  |
Draw down | 700,000,000 | 0 |  |  |  |  |  |
Repayments | (200,000,000) | 0 |  |  |  |  |  |
Refinancing | 1,000,000,000 | 0 |  |  |  |  |  |
Issue cost | (16,000,000) | 0 |  |  |  |  |  |
Amortisation of issue costs | 5,000,000 | 0 |  |  |  |  |  |
Total non-current borrowings | 1,489,000,000 | 0 |  |  |  |  |  |
Westpac fleet loan |  |  |  |  |  |  |  |
Non-current borrowings |  |  |  |  |  |  |  |
Maximum borrowing capacity | $ |  |  |  |  | $ 24,000,000 |  |  |
Balance at beginning of year | 0 |  |  |  |  |  |  |
Draw down | 322,000,000 | 0 |  |  |  |  |  |
Repayments | (64,000,000) | 0 |  |  |  |  |  |
Transferred to current liabilities | (89,000,000) | 0 |  |  |  |  |  |
Translation | 25,000,000 | 0 |  |  |  |  |  |
Total non-current borrowings | 194,000,000 | 0 |  |  |  |  |  |
Current borrowings |  |  |  |  |  |  |  |
Balance at beginning of year | 0 |  |  |  |  |  |  |
Transferred from non-current liabilities | 89,000,000 | 0 |  |  |  |  |  |
Total current borrowings | 89,000,000 | 0 |  |  |  |  |  |
US$350 million facility |  |  |  |  |  |  |  |
Non-current borrowings |  |  |  |  |  |  |  |
Maximum borrowing capacity | $ |  |  | $ 350,000,000 |  |  |  | $ 350,000,000 |
Balance at beginning of year | 4,427,000,000 | 0 |  |  |  |  |  |
Draw down | 0 | 4,127,000,000 |  |  |  |  |  |
Repayments | (422,000,000) | 0 |  |  |  |  |  |
Issue cost | 0 | (94,000,000) |  |  |  |  |  |
Amortisation of issue costs | 44,000,000 | 33,000,000 |  |  |  |  |  |
Translation | 94,000,000 | 361,000,000 |  |  |  |  |  |
Total non-current borrowings | 4,143,000,000 | 4,427,000,000 |  |  |  |  |  |
US$250 million revolving credit facility |  |  |  |  |  |  |  |
Non-current borrowings |  |  |  |  |  |  |  |
Maximum borrowing capacity | $ |  |  | 250,000,000 |  |  |  |  |
Amortisation of issue costs | 0 | 4,000,000 |  |  |  |  |  |
Translation | 0 | 12,000,000 |  |  |  |  |  |
Current borrowings |  |  |  |  |  |  |  |
Balance at beginning of year | 0 | 1,831,000,000 |  |  |  |  |  |
Repayments | 0 | (1,847,000,000) |  |  |  |  |  |
Total current borrowings | 0 | 0 |  |  |  |  |  |
US$200 million bridge loan |  |  |  |  |  |  |  |
Non-current borrowings |  |  |  |  |  |  |  |
Maximum borrowing capacity | $ |  |  | $ 200,000,000 |  |  | $ 200,000,000 |  |
Issue cost | 0 | (3,000,000) |  |  |  |  |  |
Translation | (20,000,000) | 296,000,000 |  |  |  |  |  |
Current borrowings |  |  |  |  |  |  |  |
Balance at beginning of year | 687,000,000 | 0 |  |  |  |  |  |
Draw down | 0 | 2,310,000,000 |  |  |  |  |  |
Repayments | (667,000,000) | (1,916,000,000) |  |  |  |  |  |
Total current borrowings | 0 | 687,000,000 |  |  |  |  |  |
Current |  |  |  |  |  |  |  |
Current borrowings |  |  |  |  |  |  |  |
Balance at beginning of year | 702,000,000 |  |  |  |  |  |  |
Total current borrowings | 89,000,000 | 702,000,000 |  |  |  |  |  |
Undrawn committed borrowing facilities | 0 | 0 |  |  |  |  |  |
Between one to two years |  |  |  |  |  |  |  |
Non-current borrowings |  |  |  |  |  |  |  |
Balance at beginning of year | 497,000,000 |  |  |  |  |  |  |
Total non-current borrowings | 4,232,000,000 | 497,000,000 |  |  |  |  |  |
Between two to four years |  |  |  |  |  |  |  |
Non-current borrowings |  |  |  |  |  |  |  |
Balance at beginning of year | 4,415,000,000 |  |  |  |  |  |  |
Total non-current borrowings | 1,594,000,000 | 4,415,000,000 |  |  |  |  |  |
Expiring after one year |  |  |  |  |  |  |  |
Current borrowings |  |  |  |  |  |  |  |
Undrawn committed borrowing facilities | R 1,277,000,000 | R 845,000,000 |  |  |  |  |  |

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