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Deferred Tax Balances - Summary of Composition of Unrecognised Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions | Jun. 30, 2019 | Jun. 30, 2018
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Unrecognised deferred tax assets |  |
Tax losses and tax credits | $ 3,720 | $ 3,028
Total unrecognised deferred tax assets | 10,215 | 9,669
Unrecognised deferred tax liabilities |  |
Total unrecognised deferred tax liabilities | 2,912 | 2,901
Investments, including foreign tax credits [member] |  |
Unrecognised deferred tax assets |  |
Temporary differences | 1,656 | 1,659
Unrecognised deferred tax liabilities |  |
Investments in subsidiaries | 2,253 | 2,216
Australian petroleum resource rent tax [member] |  |
Unrecognised deferred tax assets |  |
Temporary differences | 2,197 | 2,282
Unrecognised deferred tax liabilities |  |
Taxable temporary differences relating to unrecognised deferred tax asset for PRRT | 659 | 685
Mineral rights [member] |  |
Unrecognised deferred tax assets |  |
Temporary differences | 2,230 | 2,263
Other [member] |  |
Unrecognised deferred tax assets |  |
Temporary differences | $ 412 | $ 437

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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 2018-01-01 -Paragraph 81 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2018-03-01&anchor=para_81_f&doctype=Standard -URIDate 2018-03-16 + Details
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