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Income Tax Expense - Additional Information (Detail) - USD ($) $ in Millions |  | 12 Months Ended
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Mar. 11, 2020 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018
Disclosure of significant subsidiaries [line items] |  |  |  |
Australian prima facie tax rate |  | 30.00% | 30.00% | 30.00%
Tax and other matters [member] | Controlled foreign companies [member] |  |  |  |
Disclosure of significant subsidiaries [line items] |  |  |  |
Payments for assessments | $ 115 | $ 83 |  |
Australian prima facie tax rate | 30.00% |  |  |
Tax and other matters [member] | Controlled foreign companies [member] | Prior years [member] |  |  |  |
Disclosure of significant subsidiaries [line items] |  |  |  |
Payments for assessments | $ 32 |  |  |

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- Definition The applicable income tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2019-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81_c_ii&doctype=Standard -URIDate 2019-03-27 + 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 cash flows from income taxes paid or refunded. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 7 -IssueDate 2019-01-01 -Paragraph 35 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2019-en-r&anchor=para_35&doctype=Standard -URIDate 2019-03-27 + Details
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- Details
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