Income Taxes (Reconciliation of Beginning and Ending balance of Unrecognized Tax) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits at beginning of the year	$ 62.3	$ 54.2	$ 45.2
Additions for tax positions	18.8	13.2	9.5
Additions for tax positions of prior periods	32.5	6.3	18.3
Reductions for tax positions of prior periods	(11.0)	(4.3)	(7.7)
Settlement with tax authorities	(1.3)	(4.0)	(10.3)
Expiration of the statute of limitations	(1.5)	(2.8)	(0.6)
Impact of foreign exchange rate fluctuations	0.1
Impact of foreign exchange rate fluctuations		(0.3)	(0.2)
Unrecognized tax benefit at end of year	$ 99.9	$ 62.3	$ 54.2