XML 101 R129.htm IDEA: XBRL DOCUMENT
v3.20.2

Dividends - Summary of Dividends Paid (Parenthetical) (Detail) - 5.5% Preference shares [member] - £ / shares | 12 Months Ended
--- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018
Disclosure of dividends [line items] |  |  |
Per cent dividend | 5.50% | 5.50% | 5.50%
Preference shares | 50,000 | 50,000 | 50,000
Par value | £ 1 | £ 1 | £ 1

X
- Definition Disclosure of dividends. + References No definition available. + Details
Name: | bhp_DisclosureOfDividendsLineItems
Namespace Prefix: | bhp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Preference shares annual dividend percentage. + References No definition available. + Details
Name: | bhp_PreferenceSharesAnnualDividendPercentage
Namespace Prefix: | bhp_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of shares issued by the entity, for which full payment has been received. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 79 -Subparagraph a -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_79_a_ii&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_NumberOfSharesIssuedAndFullyPaid
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The nominal value per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 79 -Subparagraph a -Clause iii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_79_a_iii&doctype=Standard -URIDate 2019-03-27 + Details
Name: | ifrs-full_ParValuePerShare
Namespace Prefix: | ifrs-full_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=ifrs-full_PreferenceSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |