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Leases - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended
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Sep. 26, 2020 | Sep. 28, 2019 | Sep. 29, 2018
Lessee, Lease, Description [Line Items] |  |  |
Rental expense |  | $ 41.7 | $ 35.4
Minimum |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Remaining lease term | 1 year |  |
Maximum |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Remaining lease term | 10 years |  |

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- Definition Lease, Remaining Lease Term + References No definition available. + Details
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Namespace Prefix: | cent_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition 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. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121573735&loc=d3e41499-112717 + Details
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Period Type: | duration

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- Details
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- Details
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