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Financial Risk Management - Summary of Financial Assets and Liabilities by Class (Parenthetical) (Detail) - USD ($) $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Apr. 02, 2024 | Jun. 30, 2024 | Jun. 30, 2023
Disclosure of detailed information about financial instruments [line items] |  |  |
Other financial assets |  | $ 1,610 | $ 1,585
Input taxes receivable |  | 492 | 531
Input taxes payable |  | 101 | 121
Other receivables |  | 195 | 246
Samarco Dam Failure [member] | Senior Note [Member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Other financial assets |  | 137 |
Blackwater and Daunia gain on divestment [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Deferred consideration divestiture of interest in a subsidiary | $ 1,100 | 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 |  | 243 | 290
Net other derivatives [member] | Level 3 [member] | Power purchase contract agreements [member] |  |  |
Disclosure of detailed information about financial instruments [line items] |  |  |
Other financial assets |  | 92 | 46
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 |  | $ 134 | $ 138

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