Amount due based upon the occurrence of an event specified in the contractual terms.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Contractual interest rate for funds borrowed, under the debt agreement.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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The current carrying amount of the liability for the freestanding or embedded guarantor's obligations under the guarantee or each group of similar guarantees.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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Amount of the recorded obligation to transfer funds in the future for fixed or minimum amounts or quantities of goods or services at fixed or minimum prices (for example, as in take-or-pay contracts or throughput contracts).

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Commitments And Contingencies (Narrative) (Details) ZAR in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($)	Jun. 30, 2014 USD ($)	Jun. 30, 2016 ZAR	Jun. 30, 2016 USD ($)
Guarantor Obligations [Line Items]
Operating lease payments	$ 8.0	$ 6.8	$ 7.5
Capital commitments		3.4			$ 0.1
Purchase obligations		$ 5.0			$ 3.1
Guarantee [Member] \| Minimum [Member]
Guarantor Obligations [Line Items]
Charge rate				0.40%	0.40%
Guarantee [Member] \| Maximum [Member]
Guarantor Obligations [Line Items]
Charge rate				2.00%	2.00%
Counter Guarantee [Member]
Guarantor Obligations [Line Items]
Guarantee amount				ZAR 127.4	$ 8.6
Nedbank [Member] \| Guarantee [Member]
Guarantor Obligations [Line Items]
Guarantee amount				ZAR 127.4	$ 8.6