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Earnings Per Share - Summary of Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	6 Months Ended		12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Jun. 30, 2022
Earnings attributable to BHP shareholders
Continuing operations	$ 6,457	$ 8,471	$ 20,245
Total	$ 6,457	$ 9,443	$ 30,900
Weighted average number of shares
Basic	5,064	5,061	5,061
Diluted	5,073	5,072	5,071
Basic earnings per ordinary share
Continuing operations	$ 1.275	$ 1.674	$ 4
Total	1.275	1.866	6.106
Diluted earnings per ordinary share
Continuing operations	1.273	1.67	3.992
Total	1.273	1.862	6.093
Headline earnings per ordinary share (US cents)
Basic	1.279	1.856	4.39
Diluted	$ 1.277	$ 1.852	$ 4.381

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The weighted average number of ordinary shares outstanding plus the weighted average number of ordinary shares that would be issued on the conversion of all the dilutive potential ordinary shares into ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]]

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The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator) divided by the weighted average number of ordinary shares outstanding during the period (the denominator).

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