Annual report pursuant to Section 13 and 15(d)

Other Intangible Assets - Additional Information (Detail)

v3.5.0.2
Other Intangible Assets - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Sep. 24, 2016
Sep. 26, 2015
Sep. 24, 2016
Sep. 26, 2015
Sep. 27, 2014
Dec. 26, 2015
Finite-Lived Intangible Assets [Line Items]            
Indefinite-lived intangible assets, impairment charge $ 1.8 $ 7.3 $ 1.8 $ 7.3    
Amortization expense for intangibles     5.8 $ 4.3 $ 4.3  
Estimated annual amortization expense related to acquired intangible assets, 2017 5.0   5.0      
Estimated annual amortization expense related to acquired intangible assets, 2018 5.0   5.0      
Estimated annual amortization expense related to acquired intangible assets, 2019 5.0   5.0      
Estimated annual amortization expense related to acquired intangible assets, 2020 5.0   5.0      
Estimated annual amortization expense related to acquired intangible assets, 2021 $ 5.0   $ 5.0      
Minimum [Member]            
Finite-Lived Intangible Assets [Line Items]            
Weighted average remaining lives of acquired intangible assets     4 years      
Maximum [Member]            
Finite-Lived Intangible Assets [Line Items]            
Weighted average remaining lives of acquired intangible assets     25 years      
Marketing-Related Intangible Assets [Member]            
Finite-Lived Intangible Assets [Line Items]            
Weighted average remaining lives of acquired intangible assets     6 years      
Customer-Related Intangible Assets [Member]            
Finite-Lived Intangible Assets [Line Items]            
Weighted average remaining lives of acquired intangible assets     11 years      
Other Acquired Intangible Assets [Member]            
Finite-Lived Intangible Assets [Line Items]            
Weighted average remaining lives of acquired intangible assets     13 years      
IMS Trading Corp, Hydro Organics Wholesale, Inc and DMC [Member] | Marketing-Related Intangible Assets [Member]            
Finite-Lived Intangible Assets [Line Items]            
Other intangible assets, net           $ 4.2
IMS Trading Corp, Hydro Organics Wholesale, Inc and DMC [Member] | Customer-Related Intangible Assets [Member]            
Finite-Lived Intangible Assets [Line Items]            
Other intangible assets, net           22.7
IMS Trading Corp, Hydro Organics Wholesale, Inc and DMC [Member] | Other Acquired Intangible Assets [Member]            
Finite-Lived Intangible Assets [Line Items]            
Other intangible assets, net           $ 1.5