v3.26.1
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, 2026
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 | $ $ 29.03
Share price at grant date | $ / shares $ 43.45
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 | $ $ 17.3
Risk-free interest rate 3.70%
Estimated life of awards 5
Share price at grant date | $ / shares $ 43.45
Estimated volatility of share price 23.45%
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 | $ $ 29.33 [1]
MAP awards [member] | Bottom of range [member]  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Estimated life of awards 1 [1]
Share price at grant date | $ / shares $ 42.08
MAP awards [member] | Top of range [member]  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Estimated life of awards 3 [1]
Share price at grant date | $ / shares $ 56.17
Shareplus [member]  
Disclosure of terms and conditions of share-based payment arrangement [line items]  
Weighted average fair value of awards granted during the year | $ $ 30.18
Estimated life of awards 3
Share price at grant date | $ / shares $ 48.14
Dividend yield 4.88%
[1] Includes MAP awards granted on 3 October 2025 and 22 April 2026.