Other Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019	Sep. 28, 2019
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, net	$ 138,305	$ 139,406	$ 138,305	$ 139,406	$ 146,137
2020 estimated annual amortization expense related to acquired intangible assets	12,000		12,000
2021 estimated annual amortization expense related to acquired intangible assets	12,000		12,000
2022 estimated annual amortization expense related to acquired intangible assets	12,000		12,000
2023 estimated annual amortization expense related to acquired intangible assets	12,000		12,000
2024 estimated annual amortization expense related to acquired intangible assets	12,000		12,000
Estimated annual amortization expense related to acquired intangible assets after 2024	12,000		12,000
Marketing-related intangible assets
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, net	47,900	47,500	$ 47,900	47,500	48,000
Weighted average remaining lives of acquired intangible assets			4 years
Marketing-related intangible assets | Amortizable
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, net	3,300	2,900	$ 3,300	2,900	3,400
Customer-related intangible assets
Finite-Lived Intangible Assets [Line Items]
Weighted average remaining lives of acquired intangible assets			9 years
Customer-related intangible assets | Amortizable
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, net	76,300	75,800	$ 76,300	75,800	82,600
Other acquired intangible assets
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, net	14,100	16,100	$ 14,100	16,100	15,500
Weighted average remaining lives of acquired intangible assets			10 years
Other acquired intangible assets | Amortizable
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, net	8,200	10,100	$ 8,200	10,100	$ 9,600
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
Selling, general and administrative expenses
Finite-Lived Intangible Assets [Line Items]
Amortization expense for intangibles	$ 3,400	3,400	$ 10,600	10,300
Selling, general and administrative expenses | Pet Segment
Finite-Lived Intangible Assets [Line Items]
Impairment of intangible assets				2,500
C&S Products | Marketing-related intangible assets | Amortizable
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, net		900		900
C&S Products | Customer-related intangible assets | Amortizable
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, net		$ 1,900		$ 1,900