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Borrowings (Summary Of Short-Term Credit Facilities) (Details)
$ in Thousands, R in Millions
3 Months Ended
Sep. 30, 2020
USD ($)
Sep. 30, 2020
ZAR (R)
Sep. 30, 2019
USD ($)
[1]
Sep. 30, 2020
ZAR (R)
Short-term Debt [Line Items]        
Short-term facility available $ 98,014      
Utilized 69,146   $ 183,674  
Overdraft Restricted As To Use For ATM Funding Only [Member]        
Short-term Debt [Line Items]        
Short-term facility available 86,134      
Overdraft Facility [Member]        
Short-term Debt [Line Items]        
Short-term facility available 2,970      
Balance as of June 30, 2019 14,814      
Utilized 69,146      
Repaid (76,850)      
Foreign currency adjustment (384)      
Balance as of September 30, 2019 6,726      
Overdraft Facility [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]        
Short-term Debt [Line Items]        
Balance as of September 30, 2019 6,726      
Indirect And Derivative Facilities [Member]        
Short-term Debt [Line Items]        
Short-term facility available 8,910      
Balance as of June 30, 2019 5,398      
Foreign currency adjustment 159      
Balance as of September 30, 2019 5,557      
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 September 30, 2019 $ 6,681      
South Africa [Member] | Nedbank Limited [Member] | Prime Rate [Member]        
Short-term Debt [Line Items]        
Interest rate 5.85%     5.85%
Percentage used to calculate interest rate on short-term facilities 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 $ 14,851      
South Africa [Member] | Nedbank Limited [Member] | Overdraft Facility [Member]        
Short-term Debt [Line Items]        
Short-term facility available 2,970      
Balance as of June 30, 2019 58      
Utilized 9,029      
Repaid (8,811)      
Foreign currency adjustment (231)      
Balance as of September 30, 2019 45      
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 26,731      
Balance as of September 30, 2019 45      
South Africa [Member] | Nedbank Limited [Member] | Indirect And Derivative Facilities [Member]        
Short-term Debt [Line Items]        
Short-term facility available 8,910      
Balance as of June 30, 2019 5,398      
Foreign currency adjustment 159      
Balance as of September 30, 2019 5,557      
South Africa [Member] | Nedbank Limited [Member] | Indirect And Derivative Facilities [Member] | Nedbank Short-Term Credit Facility [Member]        
Short-term Debt [Line Items]        
Short-term facility available | R       R 150.0
Balance as of June 30, 2019 5,400 R 93.6    
Balance as of September 30, 2019 5,600 R 93.6    
South Africa [Member] | RMB [Member]        
Short-term Debt [Line Items]        
Short-term facility available $ 71,283      
South Africa [Member] | RMB [Member] | Prime Rate [Member]        
Short-term Debt [Line Items]        
Interest rate 7.00%     7.00%
South Africa [Member] | RMB [Member] | Overdraft Restricted As To Use For ATM Funding Only [Member]        
Short-term Debt [Line Items]        
Short-term facility available $ 71,283      
South Africa [Member] | RMB [Member] | Overdraft Facility [Member]        
Short-term Debt [Line Items]        
Short-term facility available 0      
Balance as of June 30, 2019 14,756      
Utilized 60,117      
Repaid (68,039)      
Foreign currency adjustment (153)      
Balance as of September 30, 2019 6,681      
South Africa [Member] | RMB [Member] | Indirect And Derivative Facilities [Member]        
Short-term Debt [Line Items]        
Short-term facility available 0      
Balance as of June 30, 2019 0      
Foreign currency adjustment 0      
Balance as of September 30, 2019 $ 0      
[1]
Refer to Note 20 for discontinued operations disclosures