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Fair Value Of Financial Instruments (Narrative) (Details)
R in Millions
3 Months Ended 6 Months Ended
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2018
ZAR (R)
shares
Dec. 31, 2018
USD ($)
shares
Jun. 30, 2018
ZAR (R)
contract
Jun. 30, 2018
USD ($)
contract
Derivatives, Fair Value [Line Items]                
Other payables           $ 73,464,000   $ 47,994,000 [1]
Transfers into or out of Level 3 $ 0 $ 0 $ 0 $ 0        
Minimum [Member]                
Derivatives, Fair Value [Line Items]                
Years of significant fluctuation of US Dollar to ZAR exchange rate     3 years          
Foreign Exchange Contracts [Member]                
Derivatives, Fair Value [Line Items]                
Outstanding foreign exchange contracts | contract             0 0
Cell C [Member]                
Derivatives, Fair Value [Line Items]                
Equity method investment, percentage of ownership interest         14.00% 14.00%    
Adjusted EBITDA           $ 270,900,000 R 3,900.0  
Net external debt           $ 611,400,000 R 8,800.0  
EBITDA multiple             6.32% 6.32%
Marketability discount             10.00% 10.00%
Cell C [Member] | EBITDA Multiple [Member]                
Derivatives, Fair Value [Line Items]                
Impact of increase and decrease to EBITDA multiple           0.50    
Finbond [Member]                
Derivatives, Fair Value [Line Items]                
Investment shares owned | shares         267,672,032 267,672,032    
Cell C [Member] | Net1 SA [Member] | Class A [Member]                
Derivatives, Fair Value [Line Items]                
Investment shares owned | shares         75,000,000 75,000,000    
DNI [Member]                
Derivatives, Fair Value [Line Items]                
DNI contingent consideration         R 400.0 $ 27,800,000    
Other payables         R 385.7 $ 26,800,000    
Long-term liabilities             R 373.6 $ 27,200,000
Interest rate         6.30% 6.30%    
[1] Derived from restated audited financial statements filed on Form 10-K/A on December 6, 2018