Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Mar. 31, 2016	Sep. 30, 2015	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Income tax (benefit) expense	$ (9.1)		$ (0.9)	$ 1.8	$ 19.6
Income tax expense as a percent of pre-tax income (loss) (percent)	(27.60%)		(39.10%)	(100.00%)	35.10%
Discrete tax charges associated with sale of equity method investment	$ 0.8			$ 2.8
Net tax benefit associated with research and development				0.8
Net tax charges associated with bonus depreciation			$ 1.6
Indefinitely reinvested foreign earnings	$ 112.9			$ 112.9		$ 118.5
Discrete deferred tax charge		$ 2.0