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Recently Issued Accounting Pronouncements (Details) - USD ($) $ in Millions	Mar. 28, 2020	Jun. 30, 2019	Jun. 29, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right of use asset	$ 41.9
Lease liability	40.8
Adjustment to accumulated deficit		$ 3.0
Derecognition of real estate assets	$ (171.1)		$ (179.9)
Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right of use asset		35.5
Lease liability		37.0
Derecognition of financing obligation		10.1
Real Estate \| Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Derecognition of real estate assets		7.1
Accumulated Deficit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment to accumulated deficit		3.0
Accumulated Deficit \| Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment to accumulated deficit		$ 3.0