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Revenue - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018
Disclosure of reportable segments [line items] |  |  |
Revenue from contracts with customers | $ 43,087 | $ 44,361 | $ 42,748
Other revenue adjustments | $ (156) | $ (73) | $ 381
Bottom of range [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Provisional pricing period | 60 days |  |
Top of range [member] |  |  |
Disclosure of reportable segments [line items] |  |  |
Provisional pricing period | 120 days |  |

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- Definition The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2019-01-01 -Paragraph 113 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2019-en-r&anchor=para_113_a&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2019-01-01 -Paragraph 114 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2019-en-r&anchor=para_114&doctype=Standard -URIDate 2019-03-27 + Details
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