Other Intangible Assets - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 27, 2021	Mar. 28, 2020	Mar. 27, 2021	Mar. 28, 2020	Sep. 26, 2020
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, net	$ 128,229	$ 141,686	$ 128,229	$ 141,686	$ 134,924
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
2025 estimated annual amortization expense related to acquired intangible assets	12,000		12,000
Estimated annual amortization expense related to acquired intangible assets after 2025	12,000		12,000
Marketing-related intangible assets
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, net	47,100	48,100	$ 47,100	48,100	47,600
Weighted average remaining lives of acquired intangible assets			3 years
Marketing-related intangible assets | Amortizable
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, net	2,500	3,500	$ 2,500	3,500	3,000
Customer-related intangible assets
Finite-Lived Intangible Assets [Line Items]
Weighted average remaining lives of acquired intangible assets			8 years
Customer-related intangible assets | Amortizable
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, net	68,300	79,000	$ 68,300	79,000	73,700
Other acquired intangible assets
Finite-Lived Intangible Assets [Line Items]
Other intangible assets, net	12,800	14,600	$ 12,800	14,600	13,600
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	6,900	8,700	$ 6,900	8,700	$ 7,800
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	$ 3,300	$ 3,500	$ 6,700	$ 7,300