The amount of assets representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognised. [Refer: Business combinations [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2020-01-01
-Paragraph B67
-Subparagraph d
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2020-en-r&anchor=para_B67_d&doctype=Appendix&subtype=B
-URIDate 2020-01-01

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2020-01-01
-Paragraph 134
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2020-en-r&anchor=para_134_a&doctype=Standard
-URIDate 2020-01-01

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 36
-IssueDate 2020-01-01
-Paragraph 135
-Subparagraph a
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=36&code=ifrs-tx-2020-en-r&anchor=para_135_a&doctype=Standard
-URIDate 2020-01-01

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 54
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_c&doctype=Standard
-URIDate 2020-01-01

Name:	ifrs-full_Goodwill
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Intangible Assets - Summary of Intangible Assets (Parenthetical) (Detail) - USD ($) $ in Millions	Jun. 30, 2021	Jun. 30, 2020	Jul. 01, 2019	Jun. 30, 2019
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Goodwill	$ 1,197	$ 1,197
Increase (decrease) due to changes in accounting policy required by IFRSs [member] \| Olympic Dam [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Goodwill		$ 950		$ 950
IAS 12 [Member] \| Increase (decrease) due to changes in accounting policy required by IFRSs [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Goodwill			$ 950
IAS 12 [Member] \| Increase (decrease) due to changes in accounting policy required by IFRSs [member] \| Olympic Dam [member]
Disclosure of reconciliation of changes in intangible assets and goodwill [line items]
Goodwill				$ 950