Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Jun. 30, 2016
Income Tax Holiday [Line Items]
Gross unrecognized tax benefits	$ 28.9		$ 28.9		$ 29.5
Gross unrecognized tax benefits that would impact the effective tax rate if recognized	18.7		18.7		18.9
Net change in liability for unrecognized tax benefits for uncertain tax positions			0.7
Interest and penalties included in liability for unrecognized tax benefits	$ 3.5		3.5		$ 3.4
Interest and penalties included in income tax expense			$ 0.2	$ 0.4
Effective income tax rate	44.80%	24.80%	33.30%	27.00%