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Stock-based Compensation and Other Stock Plans - Performance Awards Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
9 Months Ended 12 Months Ended
Sep. 28, 2019
Sep. 29, 2018
Dec. 29, 2018
Dec. 30, 2017
Dec. 31, 2016
Performance Awards          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Weighted average contractual term (in years) 3 years        
Maximum stock percentage to be awarded 100.00%        
Performance period 3 years        
Weighted-average grant date fair value granted (in dollars per share) $ 155.92 $ 161.18      
Performance awards shares paid out (in shares) 32,114 50,182      
Unrecognized compensation cost related to non-vested award $ 12.0        
Cost expected to be recognized over weighted-average period, in years 1 year 9 months 18 days        
Restricted Stock Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Performance period 1 year        
Cliff vesting schedule 2 years        
Granted (in shares)     33,170 13,648 45,502