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Income Tax Expense - Additional Information (Detail) - USD ($) $ in Millions		12 Months Ended
	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

X

- 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

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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.

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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

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