Segment Information - Disaggregated Revenues by Segment (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 24, 2023	Jun. 25, 2022	Jun. 24, 2023	Jun. 25, 2022
Segment Reporting Information [Line Items]
Revenues	$ 1,023,269	$ 1,015,378	$ 2,559,936	$ 2,631,146
Pet Segment
Segment Reporting Information [Line Items]
Revenues	503,329	504,781	1,394,352	1,438,423
Garden Segment
Segment Reporting Information [Line Items]
Revenues	519,940	510,597	1,165,584	1,192,723
Other pet products
Segment Reporting Information [Line Items]
Revenues	208,900	233,300	542,600	610,500
Other pet products | Pet Segment
Segment Reporting Information [Line Items]
Revenues	208,900	233,300	542,600	610,500
Other pet products | Garden Segment
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Dog and cat products
Segment Reporting Information [Line Items]
Revenues	136,000	122,500	396,900	396,700
Dog and cat products | Pet Segment
Segment Reporting Information [Line Items]
Revenues	136,000	122,500	396,900	396,700
Dog and cat products | Garden Segment
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Other manufacturers' products
Segment Reporting Information [Line Items]
Revenues	208,200	215,100	556,400	563,000
Other manufacturers' products | Pet Segment
Segment Reporting Information [Line Items]
Revenues	100,300	102,400	306,700	305,500
Other manufacturers' products | Garden Segment
Segment Reporting Information [Line Items]
Revenues	107,900	112,700	249,700	257,500
Wild bird products
Segment Reporting Information [Line Items]
Revenues	139,600	126,000	370,800	332,700
Wild bird products | Pet Segment
Segment Reporting Information [Line Items]
Revenues	58,100	46,600	148,200	125,700
Wild bird products | Garden Segment
Segment Reporting Information [Line Items]
Revenues	81,500	79,400	222,600	207,000
Other garden supplies
Segment Reporting Information [Line Items]
Revenues	330,500	318,500	693,300	728,200
Other garden supplies | Pet Segment
Segment Reporting Information [Line Items]
Revenues	0	0	0	0
Other garden supplies | Garden Segment
Segment Reporting Information [Line Items]
Revenues	$ 330,500	$ 318,500	$ 693,300	$ 728,200