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Dividends - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions |  | 12 Months Ended
--- | --- | ---
Aug. 18, 2020 | Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018
Disclosure of dividends [line items] |  |  |  |
Tax rate |  | 30.00% | 30.00% | 30.00%
Proceeds/(settlements) of cash management related instruments |  | $ (85) | $ (296) | $ 292
Major ordinary share transactions [member] |  |  |  |
Disclosure of dividends [line items] |  |  |  |
Dividend per share, after period-end | $ 0.55 |  | $ 0.78 | $ 0.63
Dividend amount, after period-end | $ 2,782 | 0 | $ 3,944 | $ 3,356
Proceeds/(settlements) of cash management related instruments |  | $ 322 |  |
BHP Group Limited [member] |  |  |  |
Disclosure of dividends [line items] |  |  |  |
Number of ordinary shares represented by each American Depositary Share |  | 2 |  |
Tax rate |  | 30.00% |  |
BHP Group Plc [member] |  |  |  |
Disclosure of dividends [line items] |  |  |  |
Number of ordinary shares represented by each American Depositary Share |  | 2 |  |

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- Definition The amount of dividends proposed or declared after the reporting period but before financial statements are authorised for issue. Such dividends are not recognised as a liability at the end of the reporting period because no obligation exists at that time. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 137 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_137_a&doctype=Standard -URIDate 2019-03-27 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 10 -IssueDate 2019-01-01 -Paragraph 13 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=10&code=ifrs-tx-2019-en-r&anchor=para_13&doctype=Standard -URIDate 2019-03-27 + Details
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