Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2019	Jun. 24, 2018	Jun. 25, 2017	Jun. 26, 2016
Operating Loss Carryforwards [Line Items]
Valuation allowance of deferred tax assets	$ 185.2	$ 127.4
Foreign net operating loss carryforward	34.6
Federal net operating loss carryforward	567.3
State net operating loss carryforwards	216.6
Unrecognized tax benefits	8.2	8.6	$ 13.3	$ 17.7
Increase (decrease) in unrecognized tax benefits	(0.4)
Estimated change in gross unrecognized tax benefits	1.0
Interest and penalties expense related to unrecognized tax benefits (less than)	0.1	0.1	$ 0.1
Interest and penalties accrued related to unrecognized tax benefits (less than)	0.1	0.1
Undistributed earnings of foreign subsidiaries	129.9
Undistributed earnings of foreign subsidiaries expected to be repatriated	125.5
Deferred tax liability for foreign income taxes expected to be withheld upon repatriation	2.4
Undistributed foreign earnings on which income taxes have not been provided	4.4
Income tax expense (benefit) if foreign earnings are repatriated	0.2
Domestic Tax Authority
Operating Loss Carryforwards [Line Items]
Valuation allowance of deferred tax assets		122.2
Increase (decrease) in valuation allowance of operating loss carryforward	55.4
Tax credit carryforward	46.4
Foreign Tax Authority
Operating Loss Carryforwards [Line Items]
Valuation allowance of deferred tax assets		$ 5.2
Increase (decrease) in valuation allowance of operating loss carryforward	2.4
Valuation allowance of net operating loss carryforwards	30.3
Net operating loss carryforward not subject to expiration	24.0
Net operating loss carryforward subject to expiration	10.6
Increase (decrease) in unrecognized tax benefits	0.5
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Tax credit carryforward	3.7
Increase (decrease) in unrecognized tax benefits	$ (0.9)