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Share-Based Compensation - Compensation Expense and Other Options (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 29, 2019
Mar. 30, 2018
Mar. 29, 2019
Mar. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Allocated share-based compensation expense $ 14.6 $ 17.0 $ 33.2 $ 33.5
Taxes related to share-based compensation 3.6 4.8 8.2 9.4
TBOs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Allocated share-based compensation expense 3.1 4.8 8.4 9.8
RSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Allocated share-based compensation expense 7.2 6.1 16.1 11.9
PSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Allocated share-based compensation expense 3.9 5.6 7.7 10.9
Deferred Stock Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Allocated share-based compensation expense $ 0.4 $ 0.5 $ 1.0 $ 0.9