Equity Instruments Issued Pursuant To BEE Transactions (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended		0 Months Ended		12 Months Ended	1 Months Ended
	Jun. 30, 2014	Jun. 30, 2014 2014 Transaction [Member]	Apr. 16, 2014 2014 Transaction [Member] Common Stock [Member]	Apr. 16, 2014 2014 Transaction [Member] Common Stock [Member]	Jun. 30, 2014 2012 Transaction [Member]	Apr. 19, 2012 2012 Transaction [Member] Common Stock [Member]	Jun. 30, 2012 2012 Transaction [Member] Common Stock [Member]
Business Acquisition, Equity Interests Issued or Issuable [Line Items]
Number of options issued						8,955,000
Number of shares, issued			4,400,000
Fair value of option				$ 11.3			$ 14.2
Expected volatility rate	47.00%	21.04%
Risk free rate	0.90%	7.90%
Expected term, in years		5 years			1 year
Estimated expected volatility calculation period, in days		30 days			250 days