Employee Share Ownership Plans - Summary of Fair Value and Assumptions in the Calculation of Fair Value for Awards Issued (Detail) - BHP Group Limited [member]	12 Months Ended
Jun. 30, 2024 USD ($) yr $ / shares
CDP awards [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Weighted average fair value of awards granted during the year \| $	$ 29.71
CDP awards [Member] \| Bottom of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Estimated life of awards \| yr	2
CDP awards [Member] \| Top of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Estimated life of awards \| yr	5
CDP awards [Member] \| Range One [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Share price at grant date	$ 44.7
CDP awards [Member] \| Range Two [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Share price at grant date	$ 42.75
LTIP awards [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Weighted average fair value of awards granted during the year \| $	$ 19.51
Risk-free interest rate	4.23%
Estimated life of awards \| yr	5
Share price at grant date	$ 44.7
Estimated volatility of share price	33.61%
MAP awards [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Weighted average fair value of awards granted during the year \| $	$ 23.95
MAP awards [member] \| Bottom of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Estimated life of awards \| yr	1
MAP awards [member] \| Top of range [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Estimated life of awards \| yr	5
MAP awards [member] \| Range One [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Share price at grant date	$ 43.49
Dividend yield	5.21%
MAP awards [member] \| Range Two [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Share price at grant date	$ 47.74
Dividend yield	5.60%
MAP awards [member] \| Range Three [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Share price at grant date	$ 45.52
Dividend yield	7.44%
MAP awards [member] \| Range Four [Member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Share price at grant date	$ 42.75
Shareplus [member]
Disclosure of terms and conditions of share-based payment arrangement [line items]
Weighted average fair value of awards granted during the year \| $	$ 24.4
Estimated life of awards \| yr	3
Share price at grant date	$ 47.23
Dividend yield	7.41%

The expected volatility of the share price used to calculate the fair value of the share options granted. Expected volatility is a measure of the amount by which a price is expected to fluctuate during a period. The measure of volatility used in option pricing models is the annualised standard deviation of the continuously compounded rates of return on the share over a period of time.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2023-01-01
-Paragraph 47
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- Definition

The option life of share options granted.

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The implied yield currently available on zero-coupon government issues of the country in whose currency the exercise price for share options granted is expressed, with a remaining term equal to the expected term of the option being valued (based on the option's remaining contractual life and taking into account the effects of expected early exercise). [Refer: Government [member]]

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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.

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- Definition

The percentage of an expected dividend used to calculate the fair value of share options granted.

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The weighted average fair value of share options granted during the period at the measurement date. [Refer: Weighted average [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 2
-IssueDate 2023-01-01
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- Definition

The weighted average share price used as input to the option pricing model to calculate the fair value of share options granted. [Refer: Option pricing model [member]; Weighted average [member]]

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