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Interests in Joint Operations - Summary of Assets Held in Joint Operations (Detail) - USD ($) $ in Millions	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Disclosure of significant joint operations [line items]
Current assets	$ 21,471	$ 23,373
Non-current assets	83,312	77,488	$ 76,863
Total assets	104,783	100,861	$ 111,993
Joint operations [member]
Disclosure of significant joint operations [line items]
Current assets	2,059	1,946
Non-current assets	37,193	35,682
Total assets	$ 39,252	$ 37,628

Expiry date 2020-01-01: The amount of resources: (a) controlled by the entity as a result of past events; and (b) from which future economic benefits are expected to flow to the entity. Effective 2020-01-01: The amount of a present economic resource controlled by the entity as a result of past events. Economic resource is a right that has the potential to produce economic benefits.

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