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Share-Based Compensation - Performance-Based Options Narrative (Details) - Performance-Based Options - USD ($)
shares in Thousands, $ in Millions
12 Months Ended
Sep. 27, 2019
Sep. 28, 2018
Sep. 29, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Performance-based options, grants in period, weighted average grant date fair value (in dollars per share) 0    
Total intrinsic value of performance-based options exercised $ 8.9 $ 7.4 $ 26.6
Performance-Based Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award vesting period 3 years    
Award expiration period 10 years