Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Narrative (Details)

v3.8.0.1
Stock-Based Compensation - Narrative (Details) - USD ($)
$ in Millions
6 Months Ended
Mar. 31, 2018
Mar. 25, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Tax benefit associated with share-based compensation expense $ 1.5 $ 1.9
Selling, general and administrative expenses    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense $ 5.5 $ 5.3