Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 30, 2019	Mar. 31, 2018	Mar. 30, 2019	Mar. 31, 2018	Jun. 30, 2018
Operating Loss Carryforwards [Line Items]
Income tax expense (benefit)	$ 5.6	$ 3.1	$ 22.2	$ 4.3
Unrecognized tax benefits	53.3		53.3		$ 48.6
Interest and penalties accrued	2.0		2.0
Unrecognized tax benefits that may be recognized during the next twelve months	$ 0.8		$ 0.8
Foreign
Operating Loss Carryforwards [Line Items]
Tax benefit related to income tax intraperiod tax allocation		$ 2.0
State
Operating Loss Carryforwards [Line Items]
Tax benefit related to income tax intraperiod tax allocation				$ 5.1