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Short-Term Credit Facilities (Narrative) (Details)
ZAR in Millions, $ in Millions, ₩ in Billions
6 Months Ended
Dec. 09, 2016
ZAR
Dec. 09, 2016
USD ($)
Oct. 06, 2016
USD ($)
Dec. 31, 2016
KRW (₩)
Dec. 31, 2016
ZAR
Dec. 31, 2016
USD ($)
Dec. 08, 2016
USD ($)
Jun. 30, 2016
KRW (₩)
Jun. 30, 2016
ZAR
Jun. 30, 2016
USD ($)
Short-term Debt [Line Items]                    
Amount utilized                 [1]
Value of shares issue   $ 45.0 $ 45.0              
South African Credit Facility [Member]                    
Short-term Debt [Line Items]                    
Maximum borrowing capacity         ZAR 150.0 10.9        
Amount utilized         130.5 9.5     ZAR 131.1 $ 8.9
South African Credit Facility [Member] | Nedbank Limited [Member]                    
Short-term Debt [Line Items]                    
Aggregate amount         400.0 29.2        
Primary amount, available immediately         200.0 14.6        
Secondary amount, not available immediately         200.0 14.6        
Bank Overdrafts Facility [Member]                    
Short-term Debt [Line Items]                    
Maximum borrowing capacity         ZAR 50.0 $ 3.5        
Interest rate       9.35% 9.35% 9.35%        
Commitment fee percentage       0.35%            
Nedbank Facility Letter [Member] | Nedbank Limited [Member]                    
Short-term Debt [Line Items]                    
Secondary amount, not available immediately   $ 250.0         $ 200.0      
Nedbank Facility Letter [Member] | FirstRand Bank Limited [Member]                    
Short-term Debt [Line Items]                    
Repayment amount | ZAR ZAR 600.0                  
Nedbank Facility Letter [Member] | Net1 SA [Member] | FirstRand Bank Limited [Member]                    
Short-term Debt [Line Items]                    
Guarantee amount | ZAR ZAR 2,000.0                  
South Korea, Hana Bank Overdraft Facility [Member]                    
Short-term Debt [Line Items]                    
Maximum borrowing capacity       ₩ 10   $ 8.3   ₩ 10    
Expiration date       Jan. 31, 2017            
New expiration date       Jan. 31, 2018            
Interest rate       3.47% 3.47% 3.47%        
[1] Derived from audited financial statements