XML 60 R46.htm IDEA: XBRL DOCUMENT v3.5.0.2
Auction Rate Securities - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Jun. 25, 2016
Jun. 27, 2015
Jun. 28, 2014
Schedule of Available-for-sale Securities [Line Items]      
Maturity period one 2018    
Auction rate securities with fair value having no stated maturity $ 1.5    
Auction Rate Securities Investments [Member]      
Schedule of Available-for-sale Securities [Line Items]      
ARS investments redeemed at par value 6.6 $ 4.9 $ 0.0
Auction Rate Securities with fair value maturing in 2018 7.1    
Original Cost Basis 12.5 $ 19.1  
Auction Rate Securities Investments [Member] | Below Investment Grade [Member]      
Schedule of Available-for-sale Securities [Line Items]      
Original Cost Basis $ 12.5