Borrowings (Summary Of Short-Term Credit Facilities) (Details) $ in Thousands, R in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2023 ZAR (R)	Jun. 30, 2023 ZAR (R)
Short-term Debt [Line Items]
Short-term facility available	$ 103,647		$ 103,647
Utilized	69,012	$ 167,224	128,586	$ 313,292
Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Short-term facility available	76,510		76,510
Overdraft Facility [Member]
Short-term Debt [Line Items]
Short-term facility available	11,203		11,203
Beginning Balance			32,046
Utilized			128,586
Repaid			(128,841)
Foreign currency adjustment			907
Ending Balance	32,698		32,698
Overdraft Facility [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Beginning Balance			23,021
Ending Balance	23,407		23,407
Overdraft Facility [Member] | No Restrictions As To Use [Member]
Short-term Debt [Line Items]
Beginning Balance			9,025
Ending Balance	$ 9,291		$ 9,291
Overdraft Facility [Member] | Nedbank Short-Term Credit Facility [Member] | Prime Rate [Member]
Short-term Debt [Line Items]
Interest rate	0.10%		0.10%		0.10%
Indirect And Derivative Facilities [Member]
Short-term Debt [Line Items]
Short-term facility available	$ 15,934		$ 15,934
Beginning Balance			1,869
Foreign currency adjustment			55
Ending Balance	1,924		1,924
Nedbank Limited [Member] | Indirect And Derivative Facilities [Member]
Short-term Debt [Line Items]
Short-term facility available	8,600		8,600		R 156.6	R 156.6
RMB Facility E [Member]
Short-term Debt [Line Items]
Short-term facility available	$ 76,510		$ 76,510
Interest rate	11.75%		11.75%		11.75%
RMB Facility E [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Short-term facility available	$ 76,510		$ 76,510
RMB Facility E [Member] | Overdraft Facility [Member]
Short-term Debt [Line Items]
Short-term facility available	0		0
Beginning Balance			23,021
Utilized			128,584
Repaid			(128,839)
Foreign currency adjustment			641
Ending Balance	23,407		23,407
RMB Facility E [Member] | Overdraft Facility [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Beginning Balance			23,021
Ending Balance	23,407		23,407
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		0
Beginning Balance			0
Foreign currency adjustment			0
Ending Balance	0		0
RMB Indirect [Member]
Short-term Debt [Line Items]
Short-term facility available	7,378		7,378
RMB Indirect [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Short-term facility available	0		0
RMB Indirect [Member] | Overdraft Facility [Member]
Short-term Debt [Line Items]
Short-term facility available	0		0
Beginning Balance			0
Utilized			0
Repaid			0
Foreign currency adjustment			0
Ending Balance	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	7,378		7,378
Beginning Balance			1,757
Foreign currency adjustment			52
Ending Balance	1,809		1,809
RMB Connect [Member]
Short-term Debt [Line Items]
Short-term facility available	$ 11,203		$ 11,203
Interest rate	11.65%		11.65%		11.65%
RMB Connect [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Short-term facility available	$ 0		$ 0
RMB Connect [Member] | Overdraft Facility [Member]
Short-term Debt [Line Items]
Short-term facility available	11,203		11,203
Beginning Balance			9,025
Utilized			2
Repaid			(2)
Foreign currency adjustment			266
Ending Balance	9,291		9,291
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			9,025
Ending Balance	9,291		9,291
RMB Connect [Member] | Indirect And Derivative Facilities [Member]
Short-term Debt [Line Items]
Short-term facility available	0		0
Beginning Balance			0
Foreign currency adjustment			0
Ending Balance	0		0
Nedbank Facilities [Member]
Short-term Debt [Line Items]
Short-term facility available	8,556		8,556
Nedbank Facilities [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Short-term facility available	0		0
Nedbank Facilities [Member] | Overdraft Facility [Member]
Short-term Debt [Line Items]
Short-term facility available	0		0
Beginning Balance			0
Utilized			0
Repaid			0
Foreign currency adjustment			0
Ending Balance	0		0
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	8,556		8,556
Beginning Balance			112
Foreign currency adjustment			3
Ending Balance	$ 115		$ 115