Supplemental Balance Sheet Information- Allowance for Doubtful Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Trade receivables allowance for doubtful accounts
Beginning balance	$ 3.9	$ 6.6	$ 5.4
Provision for Doubtful Accounts	1.0	(0.5)	2.7
Allowance for Doubtful Accounts Receivable, Write-offs and Recoveries, net	(0.9)	(1.8)	(1.1)
Impact of foreign exchange	0.0	(0.4)	(0.4)
Closing balance	$ 4.0	$ 3.9	$ 6.6