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Investments (Contractual Maturities of Marketable Investments) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 30, 2012
Jun. 24, 2012
Schedule of Available-for-sale Securities [Line Items]    
Within One Year $ 354,757  
After One, Within Five Years 351,438  
After Five, Within Ten Years 0  
After Ten Years 0  
Total 706,195 565,628
Municipal Bonds [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Within One Year 63,142  
After One, Within Five Years 174,808  
After Five, Within Ten Years 0  
After Ten Years 0  
Total 237,950  
Corporate Bonds [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Within One Year 34,905  
After One, Within Five Years 126,076  
After Five, Within Ten Years 0  
After Ten Years 0  
Total 160,981  
Certificates of Deposit [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Within One Year 225,000  
After One, Within Five Years 0  
After Five, Within Ten Years 0  
After Ten Years 0  
Total 225,000  
U.S. Agency Securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Within One Year 29,187  
After One, Within Five Years 42,873  
After Five, Within Ten Years 0  
After Ten Years 0  
Total 72,060  
Non-U.S. Government Securities [Member]
    
Schedule of Available-for-sale Securities [Line Items]    
Within One Year 2,523  
After One, Within Five Years 7,681  
After Five, Within Ten Years 0  
After Ten Years 0  
Total $ 10,204