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Financial risk management and financial instruments - Summary of Financial Instruments (Details) - ZAR (R) R in Millions | Jun. 30, 2023 | Jun. 30, 2022
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Financial risk management and financial instruments |  |
Financial assets - carrying value | R 92,029 | R 87,991
Financial liabilities - carrying value | 177,816 | 168,123
Long-term debt |  |
Financial risk management and financial instruments |  |
Financial liabilities - carrying value | 124,068 | 104,834
Long-term debt | At amortised cost |  |
Financial risk management and financial instruments |  |
Financial liabilities - carrying value | 124,068 | 104,834
Financial liabilities - fair value | 116,533 | 98,491
Listed long-term debt | At amortised cost | Level 1 |  |
Financial risk management and financial instruments |  |
Financial liabilities - carrying value | 90,248 | 78,076
Financial liabilities - fair value | 82,768 | 71,667
Listed convertible bonds | At amortised cost | Level 3 |  |
Financial risk management and financial instruments |  |
Financial liabilities - carrying value | 12,238 |
Financial liabilities - fair value | 12,072 |
Unlisted long-term debt | At amortised cost | Level 3 |  |
Financial risk management and financial instruments |  |
Financial liabilities - carrying value | 21,582 | 26,758
Financial liabilities - fair value | 21,693 | 26,824
Lease liabilities |  |
Financial risk management and financial instruments |  |
Financial liabilities - carrying value | 16,297 | 16,034
Lease liabilities | At amortised cost |  |
Financial risk management and financial instruments |  |
Financial liabilities - carrying value | 16,297 | 16,034
Short-term debt and bank overdraft | At amortised cost | Level 3 |  |
Financial risk management and financial instruments |  |
Financial liabilities - carrying value | 238 | 255
Financial liabilities - fair value | 238 | 255
Trade and other payables |  |
Financial risk management and financial instruments |  |
Financial liabilities - carrying value | 35,118 | 39,873
Trade and other payables | At amortised cost | Level 3 |  |
Financial risk management and financial instruments |  |
Financial liabilities - carrying value | 35,118 | 39,873
Financial liabilities - fair value | 35,118 | 39,873
Long-term and short-term financial liabilities | At fair value through profit or loss |  |
Financial risk management and financial instruments |  |
Financial liabilities - carrying value | 3,397 | 7,127
Financial liabilities - fair value | 3,397 | 7,127
Commodity and currency derivative liabilities | At fair value through profit or loss | Level 2 |  |
Financial risk management and financial instruments |  |
Financial liabilities - carrying value | 1,102 | 6,845
Financial liabilities - fair value | 1,102 | 6,845
Convertible bond embedded derivative liability | At fair value through profit or loss | Level 3 |  |
Financial risk management and financial instruments |  |
Financial liabilities - carrying value | 1,302 |
Financial liabilities - fair value | 1,302 |
Oxygen supply contract embedded derivative liabilities | At fair value through profit or loss | Level 3 |  |
Financial risk management and financial instruments |  |
Financial liabilities - carrying value | 993 | 282
Financial liabilities - fair value | 993 | 282
Long-term restricted cash |  |
Financial risk management and financial instruments |  |
Financial assets - carrying value | 1,447 | 1,531
Long-term restricted cash | At amortised cost | Level 1 |  |
Financial risk management and financial instruments |  |
Financial assets - carrying value | 1,447 | 1,531
Financial assets - fair value | 1,447 | 1,531
Long-term receivables |  |
Financial risk management and financial instruments |  |
Financial assets - carrying value | 2,803 | 3,023
Long-term receivables | At amortised cost | Level 3 |  |
Financial risk management and financial instruments |  |
Financial assets - carrying value | 2,803 | 3,023
Financial assets - fair value | 2,803 | 3,023
Trade and other receivables |  |
Financial risk management and financial instruments |  |
Financial assets - carrying value | 30,915 | 38,936
Trade and other receivables | At amortised cost | Level 3 |  |
Financial risk management and financial instruments |  |
Financial assets - carrying value | 30,915 | 38,936
Financial assets - fair value | 30,915 | 38,936
Cash and cash equivalents |  |
Financial risk management and financial instruments |  |
Financial assets - carrying value | 53,926 | 43,140
Cash and cash equivalents | At amortised cost | Level 1 |  |
Financial risk management and financial instruments |  |
Financial assets - carrying value | 53,926 | 43,140
Financial assets - fair value | 53,926 | 43,140
Long and short-term financial assets | At fair value through profit or loss |  |
Financial risk management and financial instruments |  |
Financial assets - carrying value | 2,225 | 868
Financial assets - fair value | 2,225 | 868
Commodity and currency derivative assets | At fair value through profit or loss | Level 2 |  |
Financial risk management and financial instruments |  |
Financial assets - carrying value | 472 | 247
Financial assets - fair value | 472 | 247
Oxygen supply contract embedded derivative assets | At fair value through profit or loss | Level 3 |  |
Financial risk management and financial instruments |  |
Financial assets - carrying value | 516 | 621
Financial assets - fair value | 516 | 621
Other short-term investments | At fair value through profit or loss | Level 1 |  |
Financial risk management and financial instruments |  |
Financial assets - carrying value | 1,237 |
Financial assets - fair value | 1,237 |
Investments in listed securities | Designated at fair value through other comprehensive income | Level 1 |  |
Financial risk management and financial instruments |  |
Financial assets - carrying value | 701 | 480
Financial assets - fair value | 701 | 480
Investments in unlisted securities | Designated at fair value through other comprehensive income | Level 3 |  |
Financial risk management and financial instruments |  |
Financial assets - carrying value | 12 | 13
Financial assets - fair value | R 12 | R 13

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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 2022-03-24 -Paragraph 35H -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35H&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 35M -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35M&doctype=Standard -URIDate 2022-03-24 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 35N -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35N&doctype=Standard -URIDate 2022-03-24 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 35I -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_35I&doctype=Standard -URIDate 2022-03-24 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2022-03-24 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_25&doctype=Standard -URIDate 2022-03-24 + 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 2022-03-24 -Paragraph 25 -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2022-en-r&anchor=para_25&doctype=Standard -URIDate 2022-03-24 + Details
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