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Fair Value Of Financial Instruments (Narrative) (Details)
9 Months Ended 12 Months Ended
Mar. 31, 2025
USD ($)
$ / shares
shares
Mar. 31, 2024
USD ($)
Jun. 30, 2024
USD ($)
Mar. 31, 2025
₨ / shares
Derivatives, Fair Value [Line Items]        
Transfers into or out of Level 3 $ 0 $ 0    
Accreted interest 5,033,000      
Change in fair value 0 $ 0    
Nonrecurring [Member]        
Derivatives, Fair Value [Line Items]        
Liabilities measured at fair value 0      
Cell C [Member]        
Derivatives, Fair Value [Line Items]        
Investment amount owned $ 0.0   $ 0.0  
Equity method investment, percentage of ownership interest 3.40%      
Cell C [Member] | Marketability Discount [Member]        
Derivatives, Fair Value [Line Items]        
Investment fair value measurement inputs 20.00%   20.00%  
Cell C [Member] | Minority Discount [Member]        
Derivatives, Fair Value [Line Items]        
Investment fair value measurement inputs 24.00%   24.00%  
Cell C [Member] | Minimum [Member] | Minority Discount [Member]        
Derivatives, Fair Value [Line Items]        
Increase decrease in weighted average cost of capital 1.00%      
Cell C [Member] | Maximum [Member] | Minority Discount [Member]        
Derivatives, Fair Value [Line Items]        
Increase decrease in weighted average cost of capital 1.00%      
Cell C [Member] | Class A [Member]        
Derivatives, Fair Value [Line Items]        
Investment shares owned | shares 75,000,000      
Cell C [Member] | Class A [Member] | Marketability Discount [Member]        
Derivatives, Fair Value [Line Items]        
Investment fair value measurement inputs 20.00%      
Cell C [Member] | Class A [Member] | Minority Discount [Member]        
Derivatives, Fair Value [Line Items]        
Investment fair value measurement inputs 24.00%      
Mobikwik [Member]        
Derivatives, Fair Value [Line Items]        
Investment shares owned | shares 6,215,620      
Investment amount owned $ 22,100,000   $ 76,300,000  
Last traded price of share | (per share) $ 3.56     ₨ 304.05