v3.25.2
Financial Risk Management - Summary of Financial Assets and Liabilities by Class (Parenthetical) (Detail) - USD ($)
$ in Millions
 12 Months Ended
Apr. 02, 2024
Jun. 30, 2025
Jun. 30, 2024
Disclosure of detailed information about financial instruments [line items]      
Other financial assets   $ 1,683 $ 1,610
Input taxes receivable   477 492
Input taxes payable   90 101
Samarco Dam Failure [member] | Senior Note [Member]      
Disclosure of detailed information about financial instruments [line items]      
Other financial assets   147 137
Blackwater and Daunia gain on divestment [member]      
Disclosure of detailed information about financial instruments [line items]      
Contingent consideration receivables   122 195
Deferred consideration divestiture of interest in a subsidiary $ 1,100 280 495
BHP Foundation [member]      
Disclosure of detailed information about financial instruments [line items]      
Investments held which are restricted and not available for general use by the Group   176 243
Net other derivatives [member] | Level 3 [member] | Power purchase contract agreements [member]      
Disclosure of detailed information about financial instruments [line items]      
Other financial assets   37 92
Financial assets held at fair value through profit or loss [member] | US Treasury Notes [member] | Level 1 [member] | BHP Foundation [member]      
Disclosure of detailed information about financial instruments [line items]      
Other financial assets   $ 105 $ 134