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Earnings Per Share - Summary of Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Earnings/(loss) attributable to BHP shareholders
Continuing operations	$ 6,652	$ 6,375	$ (539)
Total	$ 3,705	$ 5,890	$ (6,385)
Weighted average number of shares
Basic	5,323	5,323	5,322
Diluted	5,337	5,336	5,322
Basic earnings/(loss) per ordinary share
Continuing operations	$ 1.250	$ 1.198	$ (0.102)
Total	0.696	1.107	(1.200)
Diluted earnings/(loss) per ordinary share
Continuing operations	1.246	1.195	(0.102)
Total	$ 0.694	$ 1.104	$ (1.200)

X

- Definition

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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