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Leases and other commitments - Operating leases (Details) - ZAR (R) R in Millions	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Property, plant and equipment
Commitments under leases
Minimum future lease payments	R 24,081	R 23,275
Property, plant and equipment | Within one year
Commitments under leases
Minimum future lease payments	2,276	2,068
Property, plant and equipment | One to five years
Commitments under leases
Minimum future lease payments	6,089	5,863
Property, plant and equipment | More than five years
Commitments under leases
Minimum future lease payments	R 15,716	R 15,344
Corporate office building
Commitments under leases
Lease contract term (in years)	20 years
Lease renewal term (in years)	5 years
Rail cars
Commitments under leases
Lease renewal term (in years)	6 years
Rail cars | Minimum
Commitments under leases
Lease contract term (in years)	12 years
Rail cars | Maximum
Commitments under leases
Lease contract term (in years)	18 years

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The amount of future minimum lease payments payable under non-cancellable operating leases. Minimum lease payments are payments over the lease term that the lessee is or can be required to make, excluding contingent rent, costs for services and taxes to be paid by, and reimbursed to, the lessor, together with: (a) for a lessee, any amounts guaranteed by the lessee or by a party related to the lessee; or (b) for a lessor, any residual value guaranteed to the lessor by: (i) the lessee; (ii) a party related to the lessee; or (iii) a third party unrelated to the lessor that is financially capable of discharging the obligations under the guarantee.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Term of the lessee's leasing arrangement renewal.

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Term of the lessee's leasing arrangement.

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