Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Narrative (Details)

v3.10.0.1
Stock-Based Compensation - Narrative (Details) - USD ($)
$ in Millions
9 Months Ended
Jun. 30, 2018
Jun. 24, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Tax benefit associated with share-based compensation expense $ 2.4 $ 3.0
Selling, general and administrative expenses    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense $ 8.6 $ 8.2