XML 271 R91.htm IDEA: XBRL DOCUMENT v3.20.2

Significant Events - Summary of Financial Impacts of Samarco Dam Failure (Parenthetical) (Detail) $ in Millions	12 Months Ended
	Jun. 30, 2020 USD ($)
Disclosure of exceptional items [line items]
Funding provided during the period	$ (242)
Samarco Germano Dam Decommissioning one [Member]
Disclosure of exceptional items [line items]
Change in estimate	37
Exchange translation	(83)
Utilisation	(4)
Samarco dam failure one [Member]
Disclosure of exceptional items [line items]
Change in estimate	916
Exchange translation	(457)
Funding provided during the period	(95)
Utilisation	$ (365)

X

- Definition

Disclosure of exceptional items.

+ References

No definition available.

+ Details

Name:	bhp_DisclosureOfExceptionalItemsLineItems
Namespace Prefix:	bhp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The increase (decrease) in an accounting estimate that has an effect in the current period or is expected to have an effect in future periods.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 8
-IssueDate 2019-01-01
-Paragraph 39
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=8&code=ifrs-tx-2019-en-r&anchor=para_39&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_IncreaseDecreaseInAccountingEstimate
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The increase (decrease) in other provisions resulting from foreign currency exchange rate changes on provisions measured in a currency different from the entity's presentation currency. [Refer: Other provisions]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 37
-IssueDate 2019-01-01
-Paragraph 84
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2019-en-r&anchor=para_84&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_IncreaseDecreaseThroughNetExchangeDifferencesOtherProvisions
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

The amount used (ie incurred and charged against the provision) for other provisions. [Refer: Other provisions]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 37
-IssueDate 2019-01-01
-Paragraph 84
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2019-en-r&anchor=para_84_c&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_ProvisionUsedOtherProvisions
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

The cash outflow for the purchase of interests in investments accounted for using the equity method. [Refer: Investments accounted for using equity method]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 7
-IssueDate 2019-01-01
-Paragraph 16
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2019-en-r&anchor=para_16&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_PurchaseOfInterestsInInvestmentsAccountedForUsingEquityMethod
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	ifrs-full_ClassesOfProvisionsAxis=bhp_SamarcoGermanoDamDecommissioningOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_ClassesOfProvisionsAxis=bhp_SamarcoDamFailureOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: