Business Segment Data - Class of Similar Products Which Represented Approximately 10% or More of Company's Consolidated Net Sales (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 24, 2022	Sep. 25, 2021
Revenue from External Customer [Line Items]
Revenues	$ 3,310,083	$ 3,338,588	$ 3,303,684
Other garden products
Revenue from External Customer [Line Items]
Revenues	832,200	865,300	876,600
Other pet products
Revenue from External Customer [Line Items]
Revenues	699,400	765,900	767,000
Other manufacturers' products
Revenue from External Customer [Line Items]
Revenues	734,900	730,200	749,100
Dog & cat products
Revenue from External Customer [Line Items]
Revenues	568,600	542,900	570,900
Wild bird
Revenue from External Customer [Line Items]
Revenues	475,000	434,300	340,100
Controls & fertilizer products
Revenue from External Customer [Line Items]
Revenues	$ 0	$ 0	$ 0