XML 162 R184.htm IDEA: XBRL DOCUMENT v3.20.2

Interests in Joint Operations - Summary of Significant Interests in Joint Operations (Detail)	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Atlantis US [member]
Disclosure of significant joint operations [line items]
Country of operation	US
Principal activity	Hydrocarbons production
Group's interest	44.00%	44.00%
Bass Strait Australia [member]
Disclosure of significant joint operations [line items]
Country of operation	Australia
Principal activity	Hydrocarbons production
Group's interest	50.00%	50.00%
Greater Angostura Trinidad and Tobago [member]
Disclosure of significant joint operations [line items]
Country of operation	Trinidad and Tobago
Principal activity	Hydrocarbons production
Group's interest	45.00%	45.00%
Macedon Australia [member]
Disclosure of significant joint operations [line items]
Country of operation	Australia
Principal activity	Hydrocarbons production
Group's interest	71.43%	71.43%
Mad Dog US [member]
Disclosure of significant joint operations [line items]
Country of operation	US
Principal activity	Hydrocarbons production
Group's interest	23.90%	23.90%
North West Shelf Australia [member]
Disclosure of significant joint operations [line items]
Country of operation	Australia
Principal activity	Hydrocarbons production
North West Shelf Australia [member] | Bottom of range [member]
Disclosure of significant joint operations [line items]
Group's interest	12.50%	12.50%
North West Shelf Australia [member] | Top of range [member]
Disclosure of significant joint operations [line items]
Group's interest	16.67%	16.67%
Pyrenees Australia [member]
Disclosure of significant joint operations [line items]
Country of operation	Australia
Principal activity	Hydrocarbons production
Pyrenees Australia [member] | Bottom of range [member]
Disclosure of significant joint operations [line items]
Group's interest	40.00%	40.00%
Pyrenees Australia [member] | Top of range [member]
Disclosure of significant joint operations [line items]
Group's interest	71.43%	71.43%
ROD Integrated Development Algeria [member]
Disclosure of significant joint operations [line items]
Country of operation	Algeria
Principal activity	Hydrocarbons production
Group's interest	29.50%	29.50%
Shenzi US [member]
Disclosure of significant joint operations [line items]
Country of operation	US
Principal activity	Hydrocarbons production
Group's interest	44.00%	44.00%
Mt Goldsworthy Australia [member]
Disclosure of significant joint operations [line items]
Country of operation	Australia
Principal activity	Iron ore mining
Group's interest	85.00%	85.00%
Mt Newmen Australia [member]
Disclosure of significant joint operations [line items]
Country of operation	Australia
Principal activity	Iron ore mining
Group's interest	85.00%	85.00%
Yandi Australia [member]
Disclosure of significant joint operations [line items]
Country of operation	Australia
Principal activity	Iron ore mining
Group's interest	85.00%	85.00%
Central Queensland Coal Associates Australia [member]
Disclosure of significant joint operations [line items]
Country of operation	Australia
Principal activity	Coal mining
Group's interest	50.00%	50.00%

X

- Definition

The description of the nature of the entity's operations and principal activities.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2019-01-01
-Paragraph 138
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_138_b&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_DescriptionOfNatureOfEntitysOperationsAndPrincipalActivities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

Name:	ifrs-full_DisclosureOfJointOperationsLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The principal place of business of a joint operation. [Refer: Joint operations [member]; Principal place of business]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2019-01-01
-Paragraph 21
-Subparagraph a
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_21_a_iii&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_PrincipalPlaceOfBusinessOfJointOperation
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The proportion of ownership interest in a joint operation attributable to the entity. [Refer: Joint operations [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 12
-IssueDate 2019-01-01
-Paragraph 21
-Subparagraph a
-Clause iv
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2019-en-r&anchor=para_21_a_iv&doctype=Standard
-URIDate 2019-03-27

+ Details

Name:	ifrs-full_ProportionOfOwnershipInterestInJointOperation
Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	ifrs-full_JointOperationsAxis=bhp_AtlantisMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_JointOperationsAxis=bhp_BassStraitAustraliaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_JointOperationsAxis=bhp_GreaterAngosturaTrinidadAndTobagoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_JointOperationsAxis=bhp_MacedonMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_JointOperationsAxis=bhp_MadDogMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_JointOperationsAxis=bhp_NorthWestShelfAustraliaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_JointOperationsAxis=bhp_PyreneesAustraliaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_JointOperationsAxis=bhp_RODIntegratedDevelopmentAlgeriaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_JointOperationsAxis=bhp_ShenziMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_JointOperationsAxis=bhp_MtGoldsworthyAustraliaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_JointOperationsAxis=bhp_MtNewmenAustraliaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_JointOperationsAxis=bhp_YandiAustraliaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	ifrs-full_JointOperationsAxis=bhp_CentralQueenslandCoalAssociatesAustraliaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: