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Goodwill and Intangible Assets (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Oct. 03, 2010
Year
Oct. 02, 2011
Goodwill and Intangible Assets Disclosure [Line Items]  
Gross Carrying Value$ 153,030$ 404,892
Accumulated Amortization(60,687)(123,201)
Completed Technology
  
Goodwill and Intangible Assets Disclosure [Line Items]  
Gross Carrying Value99,747253,838
Accumulated Amortization(46,637)(76,010)
Life (years)2 
Life (years)15 
Customer Relationships
  
Goodwill and Intangible Assets Disclosure [Line Items]  
Gross Carrying Value40,220116,760
Accumulated Amortization(6,436)(21,464)
Life (years)4 
Life (years)15 
Backlog
  
Goodwill and Intangible Assets Disclosure [Line Items]  
Gross Carrying Value9,88026,900
Accumulated Amortization(6,029)(22,242)
Life (years)1 
Life (years)2 
Others
  
Goodwill and Intangible Assets Disclosure [Line Items]  
Gross Carrying Value3,1837,394
Accumulated Amortization(1,585)(3,485)
Life (years)5 
Goodwill (member)
  
Goodwill and Intangible Assets Disclosure [Line Items]  
Gross Carrying Value$ 270,832$ 491,079