Net fair value of financial assets and (liabilities).

No definition available.

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Period Type:	instant

- Definition

Percentage borrowings with floating rates.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Risk exposure associated with instruments sharing characteristic, amount of change in risk.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	instant

- Definition

Risk exposure associated with instruments sharing characteristic, percentage change in risk.

+ References

No definition available.

+ Details

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- Definition

Tonnes of exposure for provisionally priced.

+ References

No definition available.

+ Details

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Data Type:	xbrli:decimalItemType
Balance Type:	na
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- Definition

Transfer between fair value hierarchy categories.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of outstanding funds that the entity is obligated to repay.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2023-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_55&doctype=Standard
-URIDate 2023-03-23

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The adjustment to the basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IFRS
-Number 7
-IssueDate 2023-01-01
-Paragraph 7
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_7&doctype=Standard
-URIDate 2023-03-23

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings]

+ References

+ Details

Name:	ifrs-full_BorrowingsInterestRateBasis
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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
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- Definition

The amount of risk exposure associated with financial instruments with a shared characteristic that identifies a concentration of risks. [Refer: Financial instruments, class [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2023-01-01
-Paragraph B8
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_B8_c&doctype=Appendix&subtype=B
-URIDate 2023-03-23

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	ifrs-full_TypesOfRisksAxis=ifrs-full_InterestRateRiskMember
Namespace Prefix:
Data Type:	na
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- Details

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Data Type:	na
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- Details

Name:	ifrs-full_TypesOfRisksAxis=ifrs-full_CommodityPriceRiskMember
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Data Type:	na
Balance Type:
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- Details

Name:	ifrs-full_ClassesOfFinancialAssetsAxis=bhp_ForwardCommodityAndOtherDerivativeContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_ClassesOfFinancialAssetsAxis=bhp_ProvisionallyPricedContractMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	ifrs-full_TypesOfInterestRatesAxis=bhp_FixedInterestRateNotSwappedToFloatingRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

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Financial Risk Management - Additional Information (Detail) t in Thousands, $ in Millions	12 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($) t	Jun. 30, 2024 EUR (€) t	Jun. 30, 2024 GBP (£) t	Jun. 30, 2024 CAD ($) t	Jun. 30, 2024 AUD ($) t	Jun. 30, 2024 USD ($) t	Jun. 30, 2024 CLP ($) t
Disclosure of detailed information about financial instruments [line items]
Borrowings		$ 19,326					$ 17,602
Transfer between fair value hierarchy categories	$ 0
Percentage of borrowings exposed to floating interest rate	97.00%	98.00%
Weighted average interest rate payable	USD SOFR +1.40 per cent	USD SOFR +1.54 per cent
Debt instrument variable interest rate spread		1.54%	1.40%	1.40%	1.40%	1.40%	1.40%	1.40%
Interest rate risk [member]
Disclosure of detailed information about financial instruments [line items]
Reasonable possible change in risk, percentage			1.00%	1.00%	1.00%	1.00%	1.00%	1.00%
Effect on equity and profit after taxation, due to reasonable possible change in risk		$ 58					$ 47
Currency risk [member]
Disclosure of detailed information about financial instruments [line items]
Reasonable possible change in risk, amount			€ 0.01	£ 0.01	$ 0.01	$ 0.01		$ 10
Effect on equity and profit after taxation, due to reasonable possible change in risk		15					$ 17
Commodity price risk [member]
Disclosure of detailed information about financial instruments [line items]
Reasonable possible change in risk, percentage			10.00%	10.00%	10.00%	10.00%	10.00%	10.00%
Commodity price risk [member] \| Forward commodity and other derivative contracts [member]
Disclosure of detailed information about financial instruments [line items]
Net fair value of financial assets and (liabilities)		$ 20					$ 42
Commodity price risk [member] \| Provisionally priced contract [member]
Disclosure of detailed information about financial instruments [line items]
Reasonable possible change in risk, percentage			10.00%	10.00%	10.00%	10.00%	10.00%	10.00%
Tonnes of copper exposure \| t		314	428	428	428	428	428	428
Effect on equity and profit after taxation, due to reasonable possible change in risk		$ 184					$ 299
Fixed interest rate not swapped to floating rate [member]
Disclosure of detailed information about financial instruments [line items]
Borrowings		534					532
Fixed interest rate not swapped to floating rate [member] \| At fair value [member]
Disclosure of detailed information about financial instruments [line items]
Borrowings		$ 538					$ 538