Income Taxes (Reconciliation of Beginning and Ending balance of Unrecognized Tax) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits, beginning balance	$ 45.2	$ 74.6	$ 27.4
Additions for tax positions	9.5	4.0	7.5
Additions for tax positions of periods	18.3	19.8	41.9
Reductions for tax positions of periods	(7.7)	(40.5)	(0.5)
Settlement with tax authorities	(10.3)	(11.7)	(0.9)
Expiration of the statute of limitations	(0.6)	(1.0)	(0.9)
Impact of foreign exchange rate fluctuations	(0.2)	0.0	(0.1)
Unrecognized Tax Benefits, ending balance	$ 54.2	$ 45.2	$ 74.6