Balance Sheet and Other Details - Accounts Receivable Reserves and Allowances (Details) $ in Millions	6 Months Ended
	Dec. 31, 2016 USD ($)
Components of accounts receivable reserves and allowances
Beginning balance	$ 4.7
Charged to Costs and Expenses	1.8
Adjustments	(2.9)
Ending balance	3.6
Allowance for doubtful accounts
Components of accounts receivable reserves and allowances
Beginning balance	2.2
Charged to Costs and Expenses	0.1
Adjustments	(0.6)
Ending balance	1.7
Allowance for sales returns
Components of accounts receivable reserves and allowances
Beginning balance	2.5
Charged to Costs and Expenses	1.7
Adjustments	(2.3)
Ending balance	$ 1.9