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Income Tax Expense - Summary of Factors Affecting Income Tax Expense (Parenthetical) (Detail) - USD ($) $ in Millions | 12 Months Ended
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Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017
Income tax expense benefits [line items] |  |  |
Australian prima facie tax rate | 30.00% | 30.00% | 30.00%
US tax reform [member] |  |  |
Income tax expense benefits [line items] |  |  |
Repatriation tax |  | $ 797 |
Previously unrecognised tax credits |  | $ 603 |

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- Definition Income tax expense benefits. + References No definition available. + Details
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- Definition Tax effect from previously unrecognised tax credits. + References No definition available. + Details
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- Definition Tax effect from repatriation tax. + References No definition available. + Details
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- Definition The applicable income tax rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2018-01-01 -Paragraph 81 -Subparagraph c -Clause ii -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2018-03-01&anchor=para_81_c_ii&doctype=Standard -URIDate 2018-03-16 + Details
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- Details
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