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Income Taxes - Significant Components of Deferred Tax Assets (Liabilities) (Detail) - USD ($)
$ in Millions
Jun. 29, 2019
Jun. 30, 2018
Deferred tax assets:    
Investment writedowns   $ 1.1
Inventory writedowns $ 12.1 11.6
Property and equipment 1.5 1.9
Accrued compensation 0.8 0.1
Deferred compensation 0.5 0.6
Share-based compensation 9.5 11.1
Business credit carryforward 37.3 25.3
Acquisition intangibles 7.0 0.6
Other accruals 3.3 1.6
Deferred Tax Assets, Gross 72.0 53.9
Valuation allowance (30.4) (23.3)
Deferred Tax Assets, Net 41.6 30.6
Deferred tax liabilities:    
Interest (10.5) (14.7)
Deferred tax liabilities, Total (10.5) (14.7)
Net deferred tax assets $ 31.1 $ 15.9