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v3.19.3

Borrowings - Disclosure of Facilities' Terms Schedule (Details) | 1 Months Ended |
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Nov. 30, 2018 ZAR (R) | Jul. 31, 2018 USD ($) | Oct. 31, 2017 USD ($) | Jul. 31, 2017 USD ($) | Feb. 28, 2017 ZAR (R) | Jun. 30, 2019 ZAR (R) | Jun. 30, 2019 USD ($)
R1 billion revolving credit facility |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Maximum borrowing capacity | R |  |  |  |  |  | R 1,000,000,000 |
R2 billion facility |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Maximum borrowing capacity | R | R 2,000,000,000 |  |  |  |  | R 2,000,000,000 |
Term of facility | 4 years |  |  |  |  |  |
US$350 million facility |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Maximum borrowing capacity | $ |  |  |  | $ 350,000,000 |  |  | $ 350,000,000
Term of facility |  |  |  | 3 years |  |  |
US$200 million bridge loan |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Maximum borrowing capacity | $ |  |  | $ 200,000,000 |  |  |  | $ 200,000,000
Term of facility |  |  | 1 year |  |  |  |
Westpac fleet loan |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Maximum borrowing capacity | $ |  | $ 24,000,000 |  |  |  |  |
Term of facility |  | 4 years |  |  |  |  |
Westpac fleet loan | LIBOR |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest charge (as a percent) |  | 3.20% |  |  |  |  |
Revolving credit facility | R1 billion revolving credit facility |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Maximum borrowing capacity | R |  |  |  |  | R 1,000,000,000 |  |
Term of facility |  |  |  |  | 3 years |  |
Revolving credit facility | R1 billion revolving credit facility | JIBAR |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest charge (as a percent) |  |  |  |  | 3.15% |  |
Revolving credit facility | R2 billion facility |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Maximum borrowing capacity | R | R 1,400,000,000 |  |  |  |  |  |
Revolving credit facility | R2 billion facility | JIBAR |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest charge (as a percent) | 2.80% |  |  |  |  |  |
Revolving credit facility | US$350 million facility |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Maximum borrowing capacity | $ |  |  |  | $ 175,000,000 |  |  |
Revolving credit facility | US$350 million facility | LIBOR |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest charge (as a percent) |  |  |  | 3.00% |  |  |
Term loan | R2 billion facility |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Maximum borrowing capacity | R | R 600,000,000 |  |  |  |  |  |
Term loan | R2 billion facility | JIBAR |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest charge (as a percent) | 2.90% |  |  |  |  |  |
Term loan | US$350 million facility |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Maximum borrowing capacity | $ |  |  |  | $ 175,000,000 |  |  |
Term loan | US$350 million facility | LIBOR |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest charge (as a percent) |  |  |  | 3.15% |  |  |
First 6 months | US$200 million bridge loan | LIBOR |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest charge (as a percent) |  |  | 2.50% |  |  |  |
Next 3 months | US$200 million bridge loan | LIBOR |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest charge (as a percent) |  |  | 3.00% |  |  |  |
Last 3 months | US$200 million bridge loan | LIBOR |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |
Interest charge (as a percent) |  |  | 3.50% |  |  |  |

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