Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Jun. 30, 2015
Income Tax Holiday [Line Items]
Gross unrecognized tax benefits	$ 29.6		$ 29.6		$ 35.2
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount			4.4
Gross unrecognized tax benefits that would impact the effective tax rate if recognized	18.7		18.7		23.9
Anticipated liability decrease for unrecognized tax benefits for uncertain tax positions	0.4		0.4
Interest and penalties included in liability for unrecognized tax benefits	3.4		$ 3.4		$ 4.2
Interest and penalties included in income tax expense	$ 0.8	$ 0.7
Effective income tax rate	28.60%	29.70%	27.70%	30.20%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			35.00%
Income Tax Expense (Benefit), Intraperiod Tax Allocation	$ 5.5		$ 6.1