Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Income tax expense	$ 3.6		$ 14.1	$ 10.8	$ 20.6
Income tax expense as a percent of pre-tax income	23.80%		36.90%	34.60%	35.40%
Net tax benefit	$ 0.8
Discrete deferred tax charge		$ 2.0		$ 2.0
Net tax charges			$ 1.6
Indefinitely reinvested foreign earnings	$ 112.9			$ 112.9		$ 118.5