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Fair Value Measurements (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Dec. 31, 2011
Jun. 25, 2011
Dec. 25, 2010
Jun. 26, 2010
Dec. 31, 2011
Fair Value, Measurements, Recurring [Member]
Jun. 25, 2011
Fair Value, Measurements, Recurring [Member]
Jun. 26, 2010
Fair Value, Measurements, Recurring [Member]
Dec. 31, 2011
Fair Value, Measurements, Recurring [Member]
Total [Member]
Jun. 25, 2011
Fair Value, Measurements, Recurring [Member]
Total [Member]
Dec. 31, 2011
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 1 [Member]
Jun. 25, 2011
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 1 [Member]
Dec. 31, 2011
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 2 [Member]
Jun. 25, 2011
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 2 [Member]
Dec. 31, 2011
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 3 [Member]
Jun. 25, 2011
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 3 [Member]
Dec. 31, 2011
Fair Value, Measurements, Nonrecurring [Member]
Jun. 25, 2011
Fair Value, Measurements, Nonrecurring [Member]
Dec. 31, 2011
Money market funds [Member]
Fair Value, Measurements, Recurring [Member]
Total [Member]
Jun. 25, 2011
Money market funds [Member]
Fair Value, Measurements, Recurring [Member]
Total [Member]
Dec. 31, 2011
Money market funds [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 1 [Member]
Jun. 25, 2011
Money market funds [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 1 [Member]
Dec. 31, 2011
Money market funds [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 2 [Member]
Jun. 25, 2011
Money market funds [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 2 [Member]
Dec. 31, 2011
Money market funds [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 3 [Member]
Jun. 25, 2011
Money market funds [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 3 [Member]
Dec. 31, 2011
Certificates of deposit [Member]
Fair Value, Measurements, Recurring [Member]
Total [Member]
Jun. 25, 2011
Certificates of deposit [Member]
Fair Value, Measurements, Recurring [Member]
Total [Member]
Dec. 31, 2011
Certificates of deposit [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 1 [Member]
Jun. 25, 2011
Certificates of deposit [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 1 [Member]
Dec. 31, 2011
Certificates of deposit [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 2 [Member]
Jun. 25, 2011
Certificates of deposit [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 2 [Member]
Dec. 31, 2011
Certificates of deposit [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 3 [Member]
Jun. 25, 2011
Certificates of deposit [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 3 [Member]
Dec. 31, 2011
Government agency securities [Member]
Fair Value, Measurements, Recurring [Member]
Total [Member]
Jun. 25, 2011
Government agency securities [Member]
Fair Value, Measurements, Recurring [Member]
Total [Member]
Dec. 31, 2011
Government agency securities [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 1 [Member]
Jun. 25, 2011
Government agency securities [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 1 [Member]
Dec. 31, 2011
Government agency securities [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 2 [Member]
Jun. 25, 2011
Government agency securities [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 2 [Member]
Dec. 31, 2011
Government agency securities [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 3 [Member]
Jun. 25, 2011
Government agency securities [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 3 [Member]
Dec. 31, 2011
Foreign currency forward contracts [Member]
Fair Value, Measurements, Recurring [Member]
Total [Member]
Jun. 25, 2011
Foreign currency forward contracts [Member]
Fair Value, Measurements, Recurring [Member]
Total [Member]
Dec. 31, 2011
Foreign currency forward contracts [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 1 [Member]
Jun. 25, 2011
Foreign currency forward contracts [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 1 [Member]
Dec. 31, 2011
Foreign currency forward contracts [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 2 [Member]
Jun. 25, 2011
Foreign currency forward contracts [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 2 [Member]
Dec. 31, 2011
Foreign currency forward contracts [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 3 [Member]
Jun. 25, 2011
Foreign currency forward contracts [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 3 [Member]
Dec. 31, 2011
Accrued Liabilities [Member]
Fair Value, Measurements, Recurring [Member]
Total [Member]
Jun. 25, 2011
Accrued Liabilities [Member]
Fair Value, Measurements, Recurring [Member]
Total [Member]
Dec. 31, 2011
Accrued Liabilities [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 1 [Member]
Jun. 25, 2011
Accrued Liabilities [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 1 [Member]
Dec. 31, 2011
Accrued Liabilities [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 2 [Member]
Dec. 31, 2011
Accrued Liabilities [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 3 [Member]
Jun. 25, 2011
Accrued Liabilities [Member]
Fair Value, Measurements, Recurring [Member]
Fair Value Measurements Using Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                                                                                                                
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings         $ 0 $ 0                                                                                                    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases         11,354 8,800                                                                                                    
Business acquisition,cash paid for contingent consideration         (1,830)                                                                                                      
Cash and cash equivalents 741,160 962,541 798,344 826,512                           531,825 [1] 603,180 [1] 531,825 [1] 603,180 [1] 0 [1] 0 [1] 0 [1] 0 [1] 6,176 [1] 3,457 [1] 0 [1] 0 [1] 6,176 [1] 3,457 [1] 0 [1] 0 [1]                                              
Government agency securities 75,375 50,346                                                               75,375 [2] 50,346 [2] 0 [2] 0 [2] 75,375 [2] 50,346 [2] 0 [2] 0 [2]                              
Foreign currency forward contracts                                                                                   74 326 0 0 74 326 0 0              
Total Assets               613,450 657,309 531,825 603,180 81,625 54,129 0 0                                                                                    
Foreign currency forward contracts                                                                                   691 309 0 0 691 309 0 0              
Business Acquisition, Contingent Consideration, at Fair Value, Current                                                                                                   18,324 [3] 8,800 [3] 0 [3] 0 [3] 0 [3] 18,324 [3] 8,800 [3]
Total Liabilities               19,015 9,109 0 0 691 309 18,324 8,800                                                                                    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value         18,324 8,800 0                                                                                                  
Fair Value, Assets Measured on Recurring Basis, Change in Unrealized Gain (Loss) Included in Other Income         $ 0 $ 0                                                                                                    
[1] Included in Cash and cash equivalents in the accompanying Condensed Consolidated Balance Sheets.
[2] Included in Short-term investments in the accompanying Condensed Consolidated Balance Sheets.
[3] Included in Accrued expenses in the Condensed Consolidated Balance Sheets.