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Financial Risk Management - Summary of Reconciliation of Components of Equity and Analysis of Movements in Reserves for all Hedges (Detail) - USD ($) $ in Millions | 12 Months Ended
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Jun. 30, 2021 | Jun. 30, 2020
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items] |  |
At the beginning of the financial year | $ 27 | $ 40
Add: Change in fair value of hedging instrument recognised in OCI | 604 | (221)
Less: Reclassified from reserves to financial expenses - recognised through OCI | (585) | 208
At the end of the financial year | 46 | 27
Cash flow hedging reserve, gross [member] |  |
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items] |  |
At the beginning of the financial year | 71 | 163
Add: Change in fair value of hedging instrument recognised in OCI | 863 | (315)
Less: Reclassified from reserves to financial expenses - recognised through OCI | (792) | 223
At the end of the financial year | 142 | 71
Cash flow hedging reserve, tax [member] |  |
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items] |  |
At the beginning of the financial year | (21) | (49)
Add: Change in fair value of hedging instrument recognised in OCI | (259) | 94
Less: Reclassified from reserves to financial expenses - recognised through OCI | 238 | (66)
At the end of the financial year | (42) | (21)
Cash flow hedging reserve, net [member] |  |
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items] |  |
At the beginning of the financial year | 50 | 114
Add: Change in fair value of hedging instrument recognised in OCI | 604 | (221)
Less: Reclassified from reserves to financial expenses - recognised through OCI | (554) | 157
At the end of the financial year | 100 | 50
Cost of hedging reserve, gross [member] |  |
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items] |  |
At the beginning of the financial year | (32) | (106)
Less: Reclassified from reserves to financial expenses - recognised through OCI | (45) | 74
At the end of the financial year | (77) | (32)
Cost of hedging reserve, tax [member] |  |
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items] |  |
At the beginning of the financial year | 9 | 32
Less: Reclassified from reserves to financial expenses - recognised through OCI | 14 | (23)
At the end of the financial year | 23 | 9
Cost of hedging reserve, net [member] |  |
Disclosure of information about amounts that affected statement of comprehensive income as result of hedge accounting [line items] |  |
At the beginning of the financial year | (23) | (74)
Less: Reclassified from reserves to financial expenses - recognised through OCI | (31) | 51
At the end of the financial year | $ (54) | $ (23)

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- Definition The gains (losses) recognised in other comprehensive income on cash flow hedges, net of tax. [Refer: Cash flow hedges [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 24C -Subparagraph b -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_24C_b_i&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 24E -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_24E_a&doctype=Standard -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 91 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_91_a&doctype=Standard -URIDate 2020-01-01 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 23 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_23_c&doctype=Standard&book=b -URIDate 2020-01-01 + Details
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- Definition The amount of reclassification adjustments related to cash flow hedges, net of tax. Reclassification adjustments are amounts reclassified to profit (loss) in the current period that were recognised in other comprehensive income in the current or previous periods. [Refer: Cash flow hedges [member]; Other comprehensive income] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 92 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_92&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 24C -Subparagraph b -Clause iv -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_24C_b_iv&doctype=Standard -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 24E -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_24E_a&doctype=Standard -URIDate 2020-01-01 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 23 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_23_d&doctype=Standard&book=b -URIDate 2020-01-01 + Details
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