Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Additional Information (Detail)

v2.4.0.8
Stock-Based Compensation - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
9 Months Ended
Jun. 28, 2014
Jun. 29, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Tax benefit associated with share-based compensation expense $ 2.3 $ 4.8
Selling, General and Administrative Expenses [Member]
   
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based compensation expense $ 6.4 $ 12.5