Borrowings (Summary Of Short-Term Credit Facilities) (Details) $ in Thousands, R in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2022 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2022 USD ($)	Mar. 31, 2022 ZAR (R)	Mar. 31, 2021 USD ($)	Mar. 31, 2022 ZAR (R)
Short-term Debt [Line Items]
Short-term facility available	$ 124,140		$ 124,140
Utilized	95,048	$ 55,280	406,398		$ 261,759
Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Short-term facility available	113,382		113,382
Overdraft Facility [Member]
Short-term Debt [Line Items]
Balance as of June 30, 2020			14,245
Utilized			406,398
Repaid			(372,508)
Foreign currency adjustment			(2,457)
Balance as of March 31, 2021	45,678		45,678
Overdraft Facility [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Balance as of March 31, 2021	45,678		45,678
Indirect And Derivative Facilities [Member]
Short-term Debt [Line Items]
Short-term facility available	10,758		10,758
Balance as of June 30, 2020			10,947
Guarantees cancelled			(99)
Foreign currency adjustment			(189)
Balance as of March 31, 2021	10,659		10,659
South Africa [Member] | Amended July 2017 [Member] | Overdraft Facility [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Balance as of March 31, 2021	45,678		45,678
South Africa [Member] | Nedbank Limited [Member]
Short-term Debt [Line Items]
Short-term facility available	$ 27,900		$ 27,900			R 406.6
South Africa [Member] | Nedbank Limited [Member] | Prime Rate [Member]
Short-term Debt [Line Items]
Debt instrument, interest rate	6.60%		6.60%			6.60%
Percentage used to calculate interest rate on short-term facilities	1.15%		1.15%			1.15%
South Africa [Member] | Nedbank Limited [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Short-term facility available	$ 17,179		$ 17,179
Balance as of June 30, 2020 | R				R 156.6
Balance as of March 31, 2021 | R				156.6
South Africa [Member] | Nedbank Limited [Member] | Overdraft Facility [Member]
Short-term Debt [Line Items]
Short-term facility available	17,200		17,200			R 250.0
Balance as of June 30, 2020			0
Utilized			1,350
Repaid			(1,323)
Foreign currency adjustment			(27)
Balance as of March 31, 2021	0		0
South Africa [Member] | Nedbank Limited [Member] | Overdraft Facility [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Short-term facility available	27,937		27,937
Balance as of March 31, 2021	0		0
South Africa [Member] | Nedbank Limited [Member] | Indirect And Derivative Facilities [Member]
Short-term Debt [Line Items]
Short-term facility available	10,758		10,758			R 156.6
Balance as of June 30, 2020			10,947
Guarantees cancelled			(99)
Foreign currency adjustment			(189)
Balance as of March 31, 2021	10,659		10,659
South Africa [Member] | Nedbank Limited [Member] | Indirect And Derivative Facilities [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Balance as of June 30, 2020			10,900	156.6
Balance as of March 31, 2021	10,700		10,700	R 155.1
South Africa [Member] | RMB [Member]
Short-term Debt [Line Items]
Short-term facility available	$ 96,203		$ 96,203
South Africa [Member] | RMB [Member] | Prime Rate [Member]
Short-term Debt [Line Items]
Debt instrument, interest rate	7.75%		7.75%			7.75%
South Africa [Member] | RMB [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]
Short-term Debt [Line Items]
Short-term facility available	$ 96,203		$ 96,203
South Africa [Member] | RMB [Member] | Overdraft Facility [Member]
Short-term Debt [Line Items]
Balance as of June 30, 2020			14,245
Utilized			405,048
Repaid			(371,185)
Foreign currency adjustment			(2,430)
Balance as of March 31, 2021	45,678		45,678
South Africa [Member] | RMB [Member] | Indirect And Derivative Facilities [Member]
Short-term Debt [Line Items]
Short-term facility available	0		0
Balance as of June 30, 2020			0
Guarantees cancelled			0
Foreign currency adjustment			0
Balance as of March 31, 2021	$ 0		$ 0