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Other Equity - Summary of Reserves (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Other reserves [abstract]
Share premium account	$ 518	$ 518	$ 518
Foreign currency translation reserve	42	40	41
Employee share awards reserve	196	214	293
Hedging reserve	58	153	210
Financial assets reserve	16	10	11
Share buy-back reserve	177	177	177
Non-controlling interest contribution reserve	1,283	1,288	1,288
Total reserves	$ 2,290	$ 2,400	$ 2,538

X

- Definition

The non-controlling interest contribution reserve represents the excess of consideration received over the book value of net assets attributable to equity instruments when acquired by non-controlling interests.

+ References

No definition available.

+ Details

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X

- Definition

A component of equity representing the reserve for the redemption of the entity's own shares.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 55
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_55&doctype=Standard
-URIDate 2017-03-09

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X

- Definition

A component of equity representing reserves within equity, not including retained earnings. [Refer: Retained earnings]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 78
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_78_e&doctype=Standard
-URIDate 2017-03-09

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- References

No definition available.

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X

- Definition

A component of equity representing the accumulated portion of gain (loss) on a hedging instrument that is determined to be an effective hedge for cash flow hedges. [Refer: Cash flow hedges [member]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 78
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2018-01-01
-Name IFRS
-Number 9
-IssueDate 2017-01-01
-Paragraph 6.5.11
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=9&date=2017-03-01&anchor=para_6.5.11&doctype=Standard
-URIDate 2017-03-09

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X

- Definition

A component of equity representing exchange differences on translation of financial statements of foreign operations recognised in other comprehensive income and accumulated in equity. [Refer: Other comprehensive income]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 21
-IssueDate 2017-01-01
-Paragraph 52
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=21&date=2017-03-01&anchor=para_52_b&doctype=Standard
-URIDate 2017-03-09

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X

- Definition

A component of equity representing accumulated gains and losses on remeasuring available-for-sale financial assets. [Refer: Financial assets available-for-sale]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Note Expiry date 2018-01-01
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- Definition

A component of equity resulting from share-based payments.

+ References

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X

- Definition

The amount received or receivable from the issuance of the entity's shares in excess of nominal value.

+ References

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