Annual report pursuant to Section 13 and 15(d)

Goodwill - Additional Information (Detail)

v3.5.0.2
Goodwill - Additional Information (Detail) - Segments
12 Months Ended
Sep. 24, 2016
Sep. 26, 2015
Sep. 27, 2014
Goodwill and Intangible Assets Disclosure [Abstract]      
Number of reportable segments 2    
Fair value of reporting segments exceeds carrying value, percentage   10.00% 10.00%