Borrowings (Summary Of Short-Term Credit Facilities) (Details) R in Millions	12 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2023 ZAR (R)	Jun. 30, 2022 USD ($)	Jun. 30, 2021 USD ($)
Short-term Debt [Line Items]
Short-term facility available	$ 100,679,000
Utilized	520,065,000		$ 570,862,000	$ 360,083,000
Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Short-term facility available	74,319,000
Overdraft Facility [Member]
Short-term Debt [Line Items]
Short-term facility available	10,882,000
Beginning Balance	66,218,000		14,245
Utilized	520,065,000		570,862,000
Repaid	(547,271,000)		(525,459,000)
Foreign currency adjustment	(6,966,000)		(10,333,000)
Ending Balance	32,046,000		66,218,000	14,245
Overdraft Facility [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Beginning Balance	51,338,000
Ending Balance	23,021,000		51,338,000
Overdraft Facility [Member] | No Restrictions As To Use [Member]
Short-term Debt [Line Items]
Beginning Balance	14,880,000
Ending Balance	9,025,000		14,880,000
Indirect And Derivative Facilities [Member]
Short-term Debt [Line Items]
Short-term facility available	15,478,000
Beginning Balance	10,947,000		5,398,000
Guarantees cancelled	(5,017,000)	R 90
Utilized	1,561,000		4,009,000
Foreign currency adjustment	(642,000)		1,540,000
Ending Balance	6,849,000		10,947,000	5,398,000
RMB Facility E [Member]
Short-term Debt [Line Items]
Short-term facility available	74,319,000
RMB Facility E [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Short-term facility available	74,319,000
RMB Facility E [Member] | Overdraft Facility [Member]
Short-term Debt [Line Items]
Short-term facility available	0
Beginning Balance	51,338,000		14,245,000
Utilized	501,603,000		563,588,000
Repaid	(524,766,000)		(517,948,000)
Foreign currency adjustment	(5,154,000)		(8,547,000)
Ending Balance	$ 23,021,000		51,338,000	14,245,000
Interest rate	11.75%
RMB Facility E [Member] | Overdraft Facility [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Beginning Balance	$ 51,338,000
Ending Balance	23,021,000		51,338,000
RMB Facility E [Member] | Overdraft Facility [Member] | No Restrictions As To Use [Member]
Short-term Debt [Line Items]
Beginning Balance	0
Ending Balance	0		0
RMB Facility E [Member] | Indirect And Derivative Facilities [Member]
Short-term Debt [Line Items]
Short-term facility available	0
Beginning Balance	0		0
Guarantees cancelled	0
Utilized	0		0
Foreign currency adjustment	0		0
Ending Balance	0		0	0
RMB Indirect [Member]
Short-term Debt [Line Items]
Short-term facility available	7,167,000
RMB Indirect [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Short-term facility available	0
RMB Indirect [Member] | Overdraft Facility [Member]
Short-term Debt [Line Items]
Short-term facility available	0
Beginning Balance	0		0
Utilized	0		0
Repaid	0		0
Foreign currency adjustment	0		0
Ending Balance	0		0	0
RMB Indirect [Member] | Overdraft Facility [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Beginning Balance	0
Ending Balance	0		0
RMB Indirect [Member] | Overdraft Facility [Member] | No Restrictions As To Use [Member]
Short-term Debt [Line Items]
Beginning Balance	0
Ending Balance	0		0
RMB Indirect [Member] | Indirect And Derivative Facilities [Member]
Short-term Debt [Line Items]
Short-term facility available	7,167,000
Beginning Balance	313,000		0
Guarantees cancelled	0
Utilized	1,561,000		0
Foreign currency adjustment	(117,000)		0
Ending Balance	1,757,000		313,000	0
RMB Connect [Member]
Short-term Debt [Line Items]
Short-term facility available	10,882,000
RMB Connect [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Short-term facility available	0
RMB Connect [Member] | Overdraft Facility [Member]
Short-term Debt [Line Items]
Short-term facility available	10,882,000
Beginning Balance	14,880,000		0
Utilized	18,462,000		5,929,000
Repaid	(22,505,000)		(6,189,000)
Foreign currency adjustment	(1,812,000)		(1,763,000)
Ending Balance	$ 9,025,000		14,880,000	0
Interest rate	11.65%
RMB Connect [Member] | Overdraft Facility [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Beginning Balance	$ 0
Ending Balance	0		0
RMB Connect [Member] | Overdraft Facility [Member] | No Restrictions As To Use [Member]
Short-term Debt [Line Items]
Beginning Balance	14,880,000
Ending Balance	9,025,000		14,880,000
RMB Connect [Member] | Indirect And Derivative Facilities [Member]
Short-term Debt [Line Items]
Short-term facility available	0
Beginning Balance	0		0
Guarantees cancelled	0
Utilized	0		0
Foreign currency adjustment	0		0
Ending Balance	0		0	0
Nedbank Facilities [Member]
Short-term Debt [Line Items]
Short-term facility available	8,311,000
Nedbank Facilities [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Short-term facility available	0
Nedbank Facilities [Member] | Overdraft Facility [Member]
Short-term Debt [Line Items]
Short-term facility available	0
Beginning Balance	0		0
Utilized	0		1,345,000
Repaid	0		(1,322,000)
Foreign currency adjustment	0		(23,000)
Ending Balance	$ 0		0	0
Interest rate	0.00%
Nedbank Facilities [Member] | Overdraft Facility [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Beginning Balance	$ 0
Ending Balance	0		0
Nedbank Facilities [Member] | Overdraft Facility [Member] | No Restrictions As To Use [Member]
Short-term Debt [Line Items]
Beginning Balance	0
Ending Balance	0		0
Nedbank Facilities [Member] | Indirect And Derivative Facilities [Member]
Short-term Debt [Line Items]
Short-term facility available	8,311,000
Beginning Balance	5,654,000		5,398,000
Guarantees cancelled	(5,017,000)
Utilized	0		4,009,000
Foreign currency adjustment	(525,000)		1,540,000
Ending Balance	$ 112,000		$ 5,654,000	$ 5,398,000
South Africa [Member] | Overdraft Facility [Member] | Nedbank Short-Term Credit Facility [Member] | Prime Rate [Member]
Short-term Debt [Line Items]
Margin	0.10%	0.10%