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Subsequent Events (Narrative) (Details) - South Africa [Member] - July 2021 Civil Unrest In South Africa [Member]
R in Millions
 1 Months Ended 3 Months Ended
Jul. 31, 2021
ZAR (R)
Item
Sep. 30, 2022
ZAR (R)
Scenario Forecast [Member]    
Subsequent Event [Line Items]    
Estimated decrease in transaction fee revenue | R   R 6.0
Subsequent Event [Member]    
Subsequent Event [Line Items]    
Number of ATMs suffered damage | Item 173  
Number of branches suffered damage | Item 19  
Cost estimates to repair branches and damaged ATMs and to replace completely destroyed ATMs | R R 40.0  
Subsequent Event [Member] | July 2021 Compared To June 2021 [Member]    
Subsequent Event [Line Items]    
Decrease in ATMs transaction volumes, percent 13.00%  
Subsequent Event [Member] | August 2021 Compared To July 2021 [Member]    
Subsequent Event [Line Items]    
Decrease in ATMs transaction volumes, percent 3.00%