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Dividends - Summary of Franking Credits (Detail) - BHP Billiton Limited [Member] - USD ($) $ in Millions	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Disclosure of dividends [Line Items]
Franking credits	$ 10,400	$ 10,155	$ 9,640
Franking credits arising from the payment of current tax	1,330	1,239	81
Total franking credits available	$ 11,730	$ 11,394	$ 9,721

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Disclosure of dividends.

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Franking Credits are a type of tax credit that allows Australian Companies to pass on tax paid at the company level to shareholders.

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Franking credits available.

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Additional Franking credits arising from payment refund of current tax.

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