Accumulated Other Comprehensive (Loss) Income (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Reclassification from accumulated other comprehensive (loss) income			$ 0.0
CPS [Member]
Reclassification from accumulated other comprehensive (loss) income	$ 32.5
DNI [Member]
Reclassification from accumulated other comprehensive (loss) income		$ 5.8
Net1 Korea [Member]
Reclassification from accumulated other comprehensive (loss) income	14.2
FIHRST [Member]
Reclassification from accumulated other comprehensive (loss) income	1.6
DNI Interest as an Equity Method Investment [Member]
Reclassification from accumulated other comprehensive (loss) income	$ 11.3	$ 0.2