Restructuring Charges (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2016	Sep. 30, 2015	Mar. 31, 2016	Mar. 31, 2015
Restructuring Reserve [Roll Forward]
Reserve balance, period start		$ 2.3	$ 2.3
Restructuring costs	$ 10.0	$ 0.4	10.4	$ 25.3
Payments from qualified pension plan associated with restructuring charges			(9.4)
Cash payments			(2.2)
Other			(0.4)
Reserve balance, period end	$ 0.7		$ 0.7