Fair Value Of Financial Instruments And Equity-Accounted Investments (Outstanding Foreign Exchange Contracts) (Details)	12 Months Ended		9 Months Ended
	Jun. 30, 2013 USD ($)	Jun. 30, 2013	Mar. 31, 2014 Forward Contracts One [Member] EUR (€)	Mar. 31, 2014 Forward Contracts One [Member]	Mar. 31, 2014 Forward Contracts Two [Member] EUR (€)	Mar. 31, 2014 Forward Contracts Two [Member]	Mar. 31, 2014 Forward Contracts Three [Member] EUR (€)	Mar. 31, 2014 Forward Contracts Three [Member]	Mar. 31, 2014 Forward Contracts Four [Member] EUR (€)	Mar. 31, 2014 Forward Contracts Four [Member]	Mar. 31, 2014 Forward Contracts Five [Member] EUR (€)	Mar. 31, 2014 Forward Contracts Five [Member]	Mar. 31, 2014 Forward Contracts Six [Member] EUR (€)	Mar. 31, 2014 Forward Contracts Six [Member]	Mar. 31, 2014 Forward Contracts Seven [Member] EUR (€)	Mar. 31, 2014 Forward Contracts Seven [Member]	Mar. 31, 2014 Forward Contracts Eight [Member] EUR (€)	Mar. 31, 2014 Forward Contracts Eight [Member]	Mar. 31, 2014 Forward Contracts Nine [Member] EUR (€)	Mar. 31, 2014 Forward Contracts Nine [Member]	Mar. 31, 2014 Forward Contracts Ten [Member] EUR (€)	Mar. 31, 2014 Forward Contracts Ten [Member]	Mar. 31, 2014 Forward Contracts Eleven [Member] EUR (€)	Mar. 31, 2014 Forward Contracts Eleven [Member]	Mar. 31, 2014 Forward Contracts Twelve [Member] EUR (€)	Mar. 31, 2014 Forward Contracts Twelve [Member]	Mar. 31, 2014 Forward Contracts Thirteen [Member] EUR (€)	Mar. 31, 2014 Forward Contracts Thirteen [Member]	Mar. 31, 2014 Forward Contracts Fourteen [Member] EUR (€)	Mar. 31, 2014 Forward Contracts Fourteen [Member]	Mar. 31, 2014 Forward Contracts Fifteen [Member] EUR (€)	Mar. 31, 2014 Forward Contracts Fifteen [Member]	Mar. 31, 2014 Forward Contracts Sixteen [Member] EUR (€)	Mar. 31, 2014 Forward Contracts Sixteen [Member]	Mar. 31, 2014 Forward Contracts Seventeen [Member] EUR (€)	Mar. 31, 2014 Forward Contracts Seventeen [Member]	Mar. 31, 2014 Forward Contracts Eighteen [Member] EUR (€)	Mar. 31, 2014 Forward Contracts Eighteen [Member]	Mar. 31, 2014 Forward Contracts Nineteen [Member] EUR (€)	Mar. 31, 2014 Forward Contracts Nineteen [Member]	Mar. 31, 2014 Forward Contracts Twenty [Member] EUR (€)	Mar. 31, 2014 Forward Contracts Twenty [Member]
Derivative [Line Items]
Notional amount	$ 4,000,000		€ 192,375,000		€ 192,375,000		€ 192,195,000		€ 192,195,000		€ 180,023,000		€ 180,023,000		€ 182,273,000		€ 182,273,000		€ 180,023,000		€ 180,023,000		€ 180,023,000		€ 180,023,000		€ 181,571,000		€ 181,571,000		€ 180,023,000		€ 180,023,000		€ 180,023,000		€ 180,023,000		€ 174,425,000		€ 174,425,000
Strike price (ZAR)	9.0600	9.0600	14.9984	14.9984	15.1351	15.1351	15.2014	15.2014	15.0637	15.0637	15.2750	15.2750	15.1349	15.1349	15.2077	15.2077	15.3488	15.3488	15.4228	15.4228	15.2819	15.2819	15.3623	15.3623	15.5041	15.5041	15.5739	15.5739	15.4316	15.4316	15.6552	15.6552	15.5136	15.5136	15.5970	15.5970	15.7391	15.7391	15.8119	15.8119	15.6729	15.6729
Fair market value price (ZAR)	10.1397	10.1397	14.5664	14.5664	14.5664	14.5664	14.6290	14.6290	14.6290	14.6290	14.7011	14.7011	14.7011	14.7011	14.7778	14.7778	14.7778	14.7778	14.8537	14.8537	14.8537	14.8537	14.9372	14.9372	14.9372	14.9372	15.0122	15.0122	15.0122	15.0122	15.0976	15.0976	15.0976	15.0976	15.1859	15.1859	15.1859	15.1859	15.2688	15.2688	15.2688	15.2688
Maturity	Sep. 30, 2013	Sep. 30, 2013	Apr. 22, 2014	Apr. 22, 2014	Apr. 22, 2014	Apr. 22, 2014	May 20, 2014	May 20, 2014	May 20, 2014	May 20, 2014	Jun. 20, 2014	Jun. 20, 2014	Jun. 20, 2014	Jun. 20, 2014	Jul. 21, 2014	Jul. 21, 2014	Jul. 21, 2014	Jul. 21, 2014	Aug. 20, 2014	Aug. 20, 2014	Aug. 20, 2014	Aug. 20, 2014	Sep. 22, 2014	Sep. 22, 2014	Sep. 22, 2014	Sep. 22, 2014	Oct. 20, 2014	Oct. 20, 2014	Oct. 20, 2014	Oct. 20, 2014	Nov. 20, 2014	Nov. 20, 2014	Nov. 20, 2014	Nov. 20, 2014	Dec. 22, 2014	Dec. 22, 2014	Dec. 22, 2014	Dec. 22, 2014	Jan. 20, 2015	Jan. 20, 2015	Jan. 20, 2015	Jan. 20, 2015