Balance Sheet Components (Narrative) (Detail) (USD $)
In Millions, unless otherwise specified
Jul. 01, 2012
Dec. 25, 2011
United States Of America [Member]
   
Balance Sheet Components [Line Items]    
Cash, cash equivalents,and short-term investments $ 240.9 $ 252.2
Outside The United States Of America [Member]
   
Balance Sheet Components [Line Items]    
Cash, cash equivalents,and short-term investments $ 51.5 $ 10.5