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Earnings Per Share - Narrative (Details) - shares
shares in Millions
3 Months Ended 6 Months Ended
Mar. 27, 2020
Mar. 29, 2019
Mar. 27, 2020
Mar. 29, 2019
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of EPS (in shares) 2.1   3.8  
Share-based Compensation Award        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of EPS (in shares) 5.0 8.6 4.1 7.2
Performance-Based Options and Performance Stock Units        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Antidilutive securities excluded from computation of EPS (in shares) 1.7 1.7 1.7 1.7