Commitments and Contingencies - Schedule of Product Warranty (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Sep. 30, 2014	Jun. 30, 2014
Changes in accrued product warranty cost
Balance at the beginning of the period	$ 5.2	$ 4.5
Warranty expense	1.7	2.4
Deductions and other	(1.0)	(1.7)
Balance at the end of the period	$ 5.9	$ 5.2