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Income Taxes - Additional Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Jul. 01, 2017
Jul. 02, 2016
Jun. 27, 2015
Income Tax Disclosure [Abstract]      
Tax benefit associated with exercise of stock options $ 0.0 $ 0.0 $ 0.0
Net operating loss carryforwards      
Portion of net operating loss carryforwards, when realized, will be credited to additional paid-in-capital 117.7    
Undistributed earnings of certain foreign subsidiaries 373.3    
Estimated additional U.S. income or foreign withholding taxes that would have to be provided if earnings of foreign subsidiaries were repatriated to the U.S. 21.5    
Increase (decrease) in deferred tax asset valuation allowances (76.5) (160.2) $ 12.7
Valuation allowance attributable to pre-fiscal 2006 windfall stock option deductions 514.7    
Offset to tax expense from write off of tax deductible goodwill   9.5  
Portion of unrecognized tax benefits, if recognized, would impact the effective tax rate 3.0    
Portion of unrecognized tax benefits, if recognized, would impact the valuation allowance 36.0    
Accrued interest and penalties related to unrecognized tax benefits 1.8 1.7  
Increase in accrued interest and penalties related to unrecognized tax benefits 0.1    
Unrecognized tax benefits that may be recognized during the next twelve months 0.1    
Federal      
Net operating loss carryforwards      
Operating loss carryforwards 5,115.1    
Research and other tax credit carryforwards 103.9    
State      
Net operating loss carryforwards      
Operating loss carryforwards 762.2    
Research and other tax credit carryforwards 40.7    
Foreign      
Net operating loss carryforwards      
Operating loss carryforwards 624.0    
Research and other tax credit carryforwards $ 1.4    
Continuing operations      
Net operating loss carryforwards      
Income tax benefit intraperiod tax allocation related to other comprehensive income   20.7  
Spin-off adjustment      
Net operating loss carryforwards      
Increase (decrease) in deferred tax asset valuation allowances   $ 8.9