Short-Term Facilities (Details) ZAR in Millions, $ in Millions, ₩ in Billions	Sep. 30, 2015 KRW (₩)	Sep. 30, 2015 ZAR	Sep. 30, 2015 USD ($)	Jun. 30, 2015 ZAR	Jun. 30, 2015 USD ($)
South African Credit Facility [Member]
Short-term Debt [Line Items]
Maximum borrowing capacity		ZAR 150.0
Amount utilized		128.2	$ 9.1	ZAR 139.6	$ 11.4
Bank Overdrafts Facility [Member]
Short-term Debt [Line Items]
Maximum borrowing capacity		50.0
Amount utilized		ZAR 0.0		ZAR 0.0
Short term interest rate	8.35%	8.35%	8.35%
South Korea, Hana Bank Overdraft Facility [Member]
Short-term Debt [Line Items]
Maximum borrowing capacity	₩ 10		$ 8.4
Short term interest rate	3.20%	3.20%	3.20%