Acquisitions and Investments in Joint Ventures - Green Garden Products - Pro Forma Information (Details) - Green Garden Products - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Sep. 30, 2023	Sep. 24, 2022
Business Acquisition [Line Items]
Net sales	$ 3,357,977	$ 2,850,678
Net income attributable to Central Garden & Pet Company	$ 175,508	$ 146,277
Diluted net income per share attributable to Central Garden & Pet Company	$ 3.18	$ 2.67

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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