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Exceptional Items - Summary of Exceptional Items Related to the US Tax Reform (Detail) - USD ($) $ in Millions | 12 Months Ended
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Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017
Disclosure of exceptional items [line items] |  |  |
Taxation (income) charges related to exceptional items | $ 242 | $ (2,320) | $ (243)
US tax reform [member] |  |  |
Disclosure of exceptional items [line items] |  |  |
Re-measurement of deferred taxes as a result of reduced US corporate income tax rate |  | (1,390) |
Impairment of foreign tax credits |  | (834) |
Net impact of tax charges on deemed repatriation of accumulated earnings of non-US subsidiaries |  | (194) |
Recognition of Alternative Minimum Tax Credits |  | 95 |
Other impacts |  | 3 |
Taxation (income) charges related to exceptional items |  | $ (2,320) |

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- Definition Disclosure of exceptional items. + References No definition available. + Details
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- Definition Income tax expense benefit relating to exceptional Items. + References No definition available. + Details
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- Definition Impairment of foreign tax credits. + References No definition available. + Details
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- Definition Net impact of tax charges on deemed repatriation of accumulated earnings of subsidiaries. + References No definition available. + Details
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- Definition Other impacts of tax reforms. + References No definition available. + Details
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- Definition Recognition of alternative minimum tax credits. + References No definition available. + Details
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- Definition Change in net deferred tax assets due to re measurement. + References No definition available. + Details
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- Details
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