Quarterly report pursuant to Section 13 or 15(d)

Other Intangible Assets - Narrative (Details)

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Other Intangible Assets - Narrative (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jun. 30, 2018
Jun. 24, 2017
Jun. 30, 2018
Jun. 24, 2017
Finite-Lived Intangible Assets [Line Items]        
Amortization expense for intangibles $ 2.9 $ 1.4 $ 8.7 $ 4.3
2018 estimated annual amortization expense related to acquired intangible assets 10.0   10.0  
2019 estimated annual amortization expense related to acquired intangible assets 10.0   10.0  
2020 estimated annual amortization expense related to acquired intangible assets 10.0   10.0  
2021 estimated annual amortization expense related to acquired intangible assets 10.0   10.0  
2022 estimated annual amortization expense related to acquired intangible assets $ 10.0   $ 10.0  
Marketing-related intangible assets        
Finite-Lived Intangible Assets [Line Items]        
Weighted average remaining lives of acquired intangible assets     4 years  
Customer-related intangible assets        
Finite-Lived Intangible Assets [Line Items]        
Weighted average remaining lives of acquired intangible assets     10 years  
Other acquired intangible assets        
Finite-Lived Intangible Assets [Line Items]        
Weighted average remaining lives of acquired intangible assets     11 years  
Minimum        
Finite-Lived Intangible Assets [Line Items]        
Weighted average remaining lives of acquired intangible assets     3 years  
Maximum        
Finite-Lived Intangible Assets [Line Items]        
Weighted average remaining lives of acquired intangible assets     25 years  
K&H Manufacturing | Marketing-related intangible assets        
Finite-Lived Intangible Assets [Line Items]        
Other intangible assets, net   7.9   7.9
K&H Manufacturing | Customer-related intangible assets        
Finite-Lived Intangible Assets [Line Items]        
Other intangible assets, net   $ 21.3   $ 21.3