v3.25.2
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, 2025
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 | $ $ 29.53
Share price at grant date | $ / shares $ 43.4
CDP awards [Member] | Bottom of range [member]  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Estimated life of awards 2
CDP awards [Member] | Top of range [member]  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Estimated life of awards 5
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 | $ $ 17.49
Risk-free interest rate 4.17%
Estimated life of awards 5
Share price at grant date | $ / shares $ 43.4
Estimated volatility of share price 33.70%
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 | $ $ 26.47
Dividend yield 4.95%
MAP awards [member] | Bottom of range [member]  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Estimated life of awards 1
Share price at grant date | $ / shares $ 36.37
MAP awards [member] | Top of range [member]  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Estimated life of awards 3
Share price at grant date | $ / shares $ 44.58
Shareplus [member]  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Weighted average fair value of awards granted during the year | $ $ 21.55
Estimated life of awards 3
Share price at grant date | $ / shares $ 40.25
Dividend yield 5.28%