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Deferred Tax Balances - Summary of Composition of Unrecognised Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Millions | Jun. 30, 2021 | Jun. 30, 2020
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Unrecognised deferred tax assets |  |
Tax losses and tax credits | $ 5,944 | $ 4,088
Total unrecognised deferred tax assets | 15,047 | 11,680
Unrecognised deferred tax liabilities |  |
Investments in subsidiaries | 2,203 | 2,375
Future taxable temporary differences relating to unrecognised deferred tax asset for PRRT | 720 | 624
Total unrecognised deferred tax liabilities | 2,923 | 2,999
Investments in subsidiaries [member] |  |
Unrecognised deferred tax assets |  |
Temporary differences | 1,712 | 1,575
Deductible temporary differences relating to PRRT [member] |  |
Unrecognised deferred tax assets |  |
Temporary differences | 2,402 | 2,079
Mineral rights [member] |  |
Unrecognised deferred tax assets |  |
Temporary differences | 3,359 | 3,265
Other deductible temporary differences [member] |  |
Unrecognised deferred tax assets |  |
Temporary differences | $ 1,630 | $ 673

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- Definition Unrecognized deferred tax assets. + References No definition available. + Details
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- Definition The amount of deductible temporary differences for which no deferred tax asset is recognised in the statement of financial position. [Refer: Temporary differences [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_e&doctype=Standard -URIDate 2020-01-01 + 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 2020-01-01 -Paragraph 81 -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_f&doctype=Standard -URIDate 2020-01-01 + Details
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