A component of equity representing the entity's cumulative undistributed earnings or deficit.

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 78
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_78_e&doctype=Standard
-URIDate 2020-01-01

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph IG6
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_IG6&doctype=Implementation%20Guidance
-URIDate 2020-01-01

Name:	ifrs-full_RetainedEarnings
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

New And Amended Accounting Standards And Interpretations And Changes To Accounting Policies - Additional Information (Detail) - USD ($) $ in Millions	Jun. 30, 2021	Jun. 30, 2020	Jul. 01, 2019	Jul. 01, 2018
Disclosure of initial application of standards or interpretations [line items]
Retained earnings	$ (46,779)	$ (43,396)
IAS Twelve [Member] \| Increase (decrease) due to changes in accounting policy required by IFRSs [member]
Disclosure of initial application of standards or interpretations [line items]
Retained earnings			$ 71	$ 71