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Financial risk management and financial instruments - Summary of Financial Instruments (Details) - ZAR (R) R in Millions | Jun. 30, 2019 | Jun. 30, 2018
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Listed long-term debt |  |
Financial risk management and financial instruments |  |
Financial liabilities - fair value | R 49,421 | R 13,345
Listed long-term debt | Liabilities, Amortised cost |  |
Financial risk management and financial instruments |  |
Financial liabilities - carrying value | 46,060 | 13,704
Unlisted long-term debt |  |
Financial risk management and financial instruments |  |
Financial liabilities - fair value | 91,777 | 95,984
Unlisted long-term debt | Liabilities, Amortised cost |  |
Financial risk management and financial instruments |  |
Financial liabilities - carrying value | 91,279 | 95,750
Short-term debt and bank overdraft |  |
Financial risk management and financial instruments |  |
Financial liabilities - fair value | 1,297 | 2,035
Short-term debt and bank overdraft | Liabilities, Amortised cost |  |
Financial risk management and financial instruments |  |
Financial liabilities - carrying value | 1,297 | 2,035
Derivative liabilities and guarantees (Long- and short-term financial liabilities) |  |
Financial risk management and financial instruments |  |
Financial liabilities - fair value | 2,205 | 2,059
Derivative liabilities and guarantees (Long- and short-term financial liabilities) | Liabilities, At fair value through profit and loss |  |
Financial risk management and financial instruments |  |
Financial liabilities - carrying value | 2,205 | 2,059
Trade and other payables |  |
Financial risk management and financial instruments |  |
Financial liabilities - fair value | 28,501 | 26,518
Trade and other payables | Liabilities, Amortised cost |  |
Financial risk management and financial instruments |  |
Financial liabilities - carrying value | 28,501 | 26,518
Investments in listed securities |  |
Financial risk management and financial instruments |  |
Financial assets - fair value | 830 | 682
Investments in listed securities | Assets, Designated at fair value through other comprehensive income |  |
Financial risk management and financial instruments |  |
Financial assets - carrying value | 830 |
Investments in listed securities | Assets, Available-for-sale |  |
Financial risk management and financial instruments |  |
Financial assets - carrying value |  | 682
Investments in unlisted securities |  |
Financial risk management and financial instruments |  |
Financial assets - fair value | 393 | 244
Investments in unlisted securities | Assets, Designated at fair value through other comprehensive income |  |
Financial risk management and financial instruments |  |
Financial assets - carrying value | 393 |
Investments in unlisted securities | Assets, Available-for-sale |  |
Financial risk management and financial instruments |  |
Financial assets - carrying value |  | 244
Other long-term investments |  |
Financial risk management and financial instruments |  |
Financial assets - fair value | 25 | 25
Other long-term investments | Assets, Amortised cost |  |
Financial risk management and financial instruments |  |
Financial assets - carrying value | 25 |
Other long-term investments | Assets, Held-to-maturity |  |
Financial risk management and financial instruments |  |
Financial assets - carrying value |  | 25
Long-term receivables |  |
Financial risk management and financial instruments |  |
Financial assets - fair value | 5,582 | 3,824
Long-term receivables | Assets, Amortised cost |  |
Financial risk management and financial instruments |  |
Financial assets - carrying value | 5,582 | 3,824
Derivative assets (Long and short-term financial assets) |  |
Financial risk management and financial instruments |  |
Financial assets - fair value | 645 | 1,827
Derivative assets (Long and short-term financial assets) | Assets, At fair value through profit and loss |  |
Financial risk management and financial instruments |  |
Financial assets - carrying value | 645 | 1,827
Trade and other receivables |  |
Financial risk management and financial instruments |  |
Financial assets - fair value | 25,611 | 26,648
Trade and other receivables | Assets, Amortised cost |  |
Financial risk management and financial instruments |  |
Financial assets - carrying value | 25,611 | 26,648
Cash and cash equivalents |  |
Financial risk management and financial instruments |  |
Financial assets - fair value | 15,877 | 17,128
Cash and cash equivalents | Assets, Amortised cost |  |
Financial risk management and financial instruments |  |
Financial assets - carrying value | R 15,877 | R 17,128

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- Definition The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_25&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 35H -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_35H&doctype=Standard -URIDate 2018-03-16 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 35I -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_35I&doctype=Standard -URIDate 2018-03-16 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 35M -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_35M&doctype=Standard -URIDate 2018-03-16 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 35N -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_35N&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Financial instruments, class [member]; Financial assets; Derivatives [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2018-01-01 -Paragraph 25 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_25&doctype=Standard -URIDate 2018-03-16 + Details
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