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Fair Value Measurements Of Assets And Liabilities (Details) - USD ($)
$ / shares in Units, $ in Millions
Apr. 01, 2016
Jul. 03, 2015
Level 1 | Money market funds    
Cash equivalents:    
Money market, net asset value (usd per share) $ 1.00 $ 1.00
Recurring | Level 1 | Cost | Money market funds    
Cash equivalents:    
Cash equivalents $ 13.7 $ 12.5
Recurring | Level 1 | Fair Value | Money market funds    
Cash equivalents:    
Cash equivalents 13.7 12.5
Recurring | Level 2 | Cost | Bank certificates of deposit    
Cash equivalents:    
Cash equivalents 0.1 0.6
Recurring | Level 2 | Fair Value | Bank certificates of deposit    
Cash equivalents:    
Cash equivalents $ 0.1 $ 0.6