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Dividends - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions |  | 12 Months Ended
--- | --- | ---
Aug. 27, 2024 | Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2022
Disclosure of dividends [line items] |  |  |  |
Tax rate |  | 30.00% | 30.00% | 30.00%
Proceeds/(settlements) of cash management related instruments |  | $ (361) | $ (331) | $ (378)
Major ordinary share transactions [member] |  |  |  |
Disclosure of dividends [line items] |  |  |  |
Dividend per share, after period-end | $ 0.74 |  | $ 0.80 | $ 1.75
Dividend amount, after period-end | $ 3,752 |  | $ 4,052 | $ 8,857
Proceeds/(settlements) of cash management related instruments |  | $ 44 |  |
BHP Group Limited [member] |  |  |  |
Disclosure of dividends [line items] |  |  |  |
Number of ordinary shares represented by each American Depositary Share |  | 2 | 2 | 2
Tax rate |  | 30.00% | 30.00% | 30.00%

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