Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 23, 2018	Jun. 24, 2018
Operating Loss Carryforwards [Line Items]
U.S. statutory tax rate	21.00%
Unrecognized tax benefits balance	$ 8.7	$ 8.7
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	0.8
Domestic Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Valuation Allowance, Current		122.2
Valuation Allowance, Deferred Tax Asset Decrease, Amount	26.1
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Valuation Allowance, Current		$ 5.2
Valuation Allowance, Deferred Tax Asset Decrease, Amount	$ (2.4)