Receivables Securitization Program (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Oct. 27, 2018	Oct. 27, 2018	Jul. 24, 2018
Transfers and Servicing [Abstract]
Eligible receivables, maximum available under Purchase Agreement			$ 200,000
Eligible Receivables, amount utilized under Purchase Agreement	$ 172,000	$ 172,000
DPP receivable	58,451	58,451
Loss on sale of receivables	$ (2,192)	$ (2,871)

Accounts Receivable Securitization, Eligible Receivables, Amount Utilized Under Purchase Agreement

No definition available.

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Namespace Prefix:	pdco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Accounts Receivable Securitization, Eligible Receivables, Maximum Available Under Purchase Agreement

+ References

No definition available.

+ Details

Name:	pdco_AccountsReceivableSecuritizationEligibleReceivablesMaximumAvailableUnderPurchaseAgreement
Namespace Prefix:	pdco_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount owed to the reporting entity by counterparties in securitized loan transactions.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Reflects, by transferred financial asset type, the amount of sales proceeds in excess of or deficient from the sum of the carrying amounts of transferred financial assets plus transaction costs, including those transactions in which the seller/transferor has continuing involvement with the financial assets that have been transferred.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82924980&loc=d3e107207-111719

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 10
-Section 40
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=65892426&loc=d3e96813-111708

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration