Deferred Tax Balances - Summary of Movement in Net Deferred Tax Position (Parenthetical) (Detail) - USD ($) $ in Millions	12 Months Ended
Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Income tax credit/(charge) recorded in the income statement	$ 335	$ (81)	$ (1,445)
Discontinued operations [member]
Disclosure of temporary difference, unused tax losses and unused tax credits [line items]
Income tax credit/(charge) recorded in the income statement	$ 0	$ 40	$ 510

The amount of tax expense or income relating to changes in deferred tax liabilities and deferred tax assets, recognised in profit or loss. [Refer: Deferred tax assets; Deferred tax expense (income); Deferred tax liabilities]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2019-01-01
-Paragraph 81
-Subparagraph g
-Clause ii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2019-en-r&anchor=para_81_g_ii&doctype=Standard
-URIDate 2019-03-27

Name:	ifrs-full_DeferredTaxExpenseIncomeRecognisedInProfitOrLoss
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration