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Property, Plant and Equipment - Additional Information (Detail) - USD ($)	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Disclosure of detailed information about property, plant and equipment [line items]
Reversals of impairment	$ 0	$ 0
CGU carrying amount	68,041,000,000	67,182,000,000	$ 80,497,000,000
Impairment	$ 264,000,000	$ 333,000,000	$ 193,000,000
Real post-tax discount rate	7.50%
Jansen Potash CGU [member]
Disclosure of detailed information about property, plant and equipment [line items]
CGU carrying amount	$ 3,000,000,000
Impairment	$ 0

X

- Definition

The discount rate applied to cash flow projections for a cash-generating unit (group of units). [Refer: Cash-generating units [member]]

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

The amount recognised as a reduction of the carrying amount of an asset or cash-generating unit to its recoverable amount. [Refer: Carrying amount [member]]

+ References

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- Definition

The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period.

+ References

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- Definition

The amount of reversal of impairment loss recognised in profit or loss for property, plant and equipment. [Refer: Reversal of impairment loss recognised in profit or loss; Property, plant and equipment]

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