v2.3.0.15
Composition Of Certain Financial Statement Captions (Schedule Of Cash, Cash Equivalents, And Investments) (Details) (USD $)
In Thousands
Sep. 30, 2011
Sep. 24, 2010
Composition Of Certain Financial Statement Captions [Line Items]  
Cash$ 394,474$ 156,440
Cash and cash equivalents551,512545,861
Short-term investments391,281302,269
Long-term investments272,797[1]190,837[1]
Total cash, cash equivalents and investments1,215,5901,038,967
Corporate Bonds [Member]
  
Composition Of Certain Financial Statement Captions [Line Items]  
Long-term investments124,313[1]25,870[1]
Corporate Bonds [Member]
  
Composition Of Certain Financial Statement Captions [Line Items]  
Short-term investments52,6453,788
Commercial Paper [Member]
  
Composition Of Certain Financial Statement Captions [Line Items]  
Cash equivalents 19,993
Short-term investments 9,990
Municipal Debt Securities, Short-Term [Member]
  
Composition Of Certain Financial Statement Captions [Line Items]  
Cash equivalents 5,000
Short-term investments330,562188,123
Municipal Debt Securities, Long-Term [Member]
  
Composition Of Certain Financial Statement Captions [Line Items]  
Long-term investments141,639[1]127,458[1]
U.S. Agency Securities [Member]
  
Composition Of Certain Financial Statement Captions [Line Items]  
Cash equivalents15,00010,000
Short-term investments8,07470,376
Long-term investments6,845[1]27,522[1]
U.S. Government Bonds [Member]
  
Composition Of Certain Financial Statement Captions [Line Items]  
Short-term investments 29,992
Long-term investments 9,987[1]
Money Market Funds [Member]
  
Composition Of Certain Financial Statement Captions [Line Items]  
Cash equivalents$ 142,038$ 354,428
[1]Our long-term investments have maturities that range from one to three years.