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Income Taxes - Additional Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2018
Jul. 01, 2017
Jul. 02, 2016
Net operating loss carryforwards      
Operating loss carryforwards   $ 117.7  
Undistributed earnings of certain foreign subsidiaries $ 261.4    
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. 26.2    
Change in tax rate, deferred tax asset, tax benefit 4.5    
Change in tax rate, tax benefit 2.0    
Change in tax rate, change in deferred tax assets 735.5    
Change in tax rate, operating loss carryforwards 117.7    
Increase (decrease) in deferred tax asset valuation allowances 714.1 76.5 $ 160.2
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 3.3    
Portion of unrecognized tax benefits, if recognized, would impact the valuation allowance 45.3    
Accrued interest and penalties related to unrecognized tax benefits 1.9 1.8  
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 1.2    
Federal      
Net operating loss carryforwards      
Operating loss carryforwards 5,166.9    
Research and other tax credit carryforwards 106.6    
State      
Net operating loss carryforwards      
Operating loss carryforwards 723.6    
Research and other tax credit carryforwards 50.3    
Foreign      
Net operating loss carryforwards      
Operating loss carryforwards 649.3    
Research and other tax credit carryforwards $ 1.8    
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)