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Deferred Tax Balances - Summary of Composition of Unrecognised Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions | Jun. 30, 2018 | Jun. 30, 2017
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Unrecognised deferred tax assets |  |
Tax losses and tax credits | $ 3,028 | $ 2,687
Total unrecognised deferred tax assets | 9,669 | 8,607
Unrecognised deferred tax liabilities |  |
Total unrecognised deferred tax liabilities | 2,901 | 3,194
Investments, including foreign tax credits [Member] |  |
Unrecognised deferred tax assets |  |
Temporary differences | 1,659 | 856
Unrecognised deferred tax liabilities |  |
Investments in subsidiaries | 2,216 | 2,500
Australian petroleum resource rent tax [Member] |  |
Unrecognised deferred tax assets |  |
Temporary differences | 2,282 | 2,293
Unrecognised deferred tax liabilities |  |
Taxable temporary differences relating to unrecognised deferred tax asset for PRRT | 685 | 694
Mineral rights [Member] |  |
Unrecognised deferred tax assets |  |
Temporary differences | 2,263 | 2,293
Other [Member] |  |
Unrecognised deferred tax assets |  |
Temporary differences | $ 437 | $ 478

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- Definition Unrecognized deferred tax assets. + References No definition available. + Details
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- Definition The aggregate amount of temporary differences associated with investments in subsidiaries, branches and associates and interests in joint arrangements, for which deferred tax liabilities have not been recognised as a result of satisfying both of the following conditions: (a) the parent, investor, joint venturer or joint operator is able to control the timing of the reversal of the temporary difference; and (b) it is probable that the temporary difference will not reverse in the foreseeable future. [Refer: Associates [member]; Subsidiaries [member]; Temporary differences [member]; Investments in subsidiaries] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2017-01-01 -Paragraph 81 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_f&doctype=Standard -URIDate 2017-03-09 + Details
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