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Financial risk management and financial instruments - Derivatives Designated in Hedge Relationships (Details) - Interest rate swap - Cash flow hedge R in Millions, $ in Millions | 1 Months Ended |  |
--- | --- | --- | ---
Jul. 31, 2015 USD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2018 ZAR (R) | Jun. 30, 2017 USD ($) | Jun. 30, 2017 ZAR (R)
Financial risk management and financial instruments |  |  |  |  |
Percentage of LIBOR exposure hedged | 50.00% |  |  |  |
Contract/Notional amount | $ | $ 3,995 | $ 2,000 |  | $ 1,980 |
Fair value of assets |  |  | R 246 |  |
Fair value of liabilities |  |  |  |  | R (1,070)

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- Definition The amount of derivative financial assets held for hedging. [Refer: Derivative financial assets] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_55&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The amount of derivative financial liabilities held for hedging. [Refer: Derivative financial liabilities] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 55 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_55&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The nominal or face amount of a financial instrument, used to calculate payments made on that instrument. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2017-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition The percentage of the underlying liability's variable interest rate exposure that is hedged. + References No definition available. + Details
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- Details
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- Details
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