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Stock Plans (Narrative) (Details) (USD $)
3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended 3 Months Ended 9 Months Ended
Sep. 29, 2013
Sep. 30, 2012
Sep. 29, 2013
plan
Sep. 30, 2012
Sep. 29, 2013
Employee Stock Purchase Plan [Member]
Sep. 29, 2013
Stock Awards [Member]
Jun. 30, 2013
Stock Awards [Member]
Sep. 30, 2012
Stock Awards [Member]
Jul. 01, 2012
Stock Awards [Member]
Sep. 29, 2013
Stock Awards [Member]
Sep. 30, 2012
Stock Awards [Member]
Sep. 29, 2013
Performance Units [Member]
Sep. 30, 2012
Performance Units [Member]
Sep. 29, 2013
Performance Units [Member]
Sep. 30, 2012
Performance Units [Member]
Sep. 29, 2013
Restricted Stock Awards [Member]
Sep. 30, 2012
Restricted Stock Awards [Member]
Sep. 29, 2013
Restricted Stock Awards [Member]
Sep. 30, 2012
Restricted Stock Awards [Member]
Dec. 30, 2012
Restricted Stock Awards [Member]
Sep. 29, 2013
Stock Options [Member]
Sep. 30, 2012
Stock Options [Member]
Sep. 29, 2013
Stock Options [Member]
Sep. 30, 2012
Stock Options [Member]
Sep. 29, 2013
2009 Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                                                  
Number of Former Stock-based Compensation Plans     1                                            
Shares authorized under plan         5,000,000                                       10,000,000
Total income tax benefit recognized for stock-based compensation $ 1,200,000 $ 1,600,000 $ 3,600,000 $ 5,000,000                                          
Stock-based compensation costs capitalized as part of inventory     300,000 300,000                                          
Options related excess tax benefit, classified as a financing cash activity     0 1,767,000                                          
Weighted-average grant-date fair value of options                                         $ 0.00 $ 7.71 $ 10.82 $ 7.36  
Total intrinsic value of options exercised                                         6,200,000 3,900,000 10,300,000 9,100,000  
Cash received from option exercises                                             15,300,000 22,900,000  
Shares/units granted         89,521   3,263   3,580   955     98,056 122,675     277,000              
Weighted-average grant-date fair value of stock granted (per share)         $ 30.51         $ 30.65 $ 27.87     $ 34.06 $ 26.18 $ 36.11 $ 27.06 $ 33.74 $ 25.85            
Fair value of restricted stock awards vested                               400,000 100,000 7,600,000 4,200,000            
Total pre-tax stock-based compensation expense 3,781,000 5,101,000 11,423,000 15,352,000   0   0   700,000 700,000 1,000,000 1,900,000 1,900,000 4,900,000 1,700,000 1,900,000 5,600,000 6,100,000   1,100,000 1,200,000 3,200,000 3,700,000  
Awards/units outstanding                       282,044   282,044   661,000   661,000   781,000          
Deferred Compensation Share-based Arrangements, Liability, Current and Noncurrent                       5,400,000   5,400,000                      
Total unrecognized compensation cost, net of estimated forfeitures, related to nonvested stock, granted                               $ 10,800,000   $ 10,800,000     $ 6,800,000   $ 6,800,000    
Weighted-average period for recognition of unrecognized compensation cost, years                                   1 year 5 months         1 year 11 months    
Shares available for grant under employee stock purchase plan         1,100,000