Central Garden & Pet Company Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Share - Additional Information (Detail)

Earnings Per Share - Additional Information (Detail) (Stock Options [Member], USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 28, 2015	Mar. 29, 2014	Mar. 28, 2015	Mar. 29, 2014
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock outstanding, included in computation of diluted earnings per share	9.6	11.6	9.6	11.6
Common stock outstanding, not included in computation of diluted earnings per share	3.4	10.4	6.1	10.4
Minimum [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Outstanding options to purchase common stock			6.43	4.60
Maximum [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Outstanding options to purchase common stock			15.00	16.23

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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