Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Apr. 27, 2019	Jun. 18, 2019	Oct. 28, 2018
Document And Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Apr. 27, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Registrant Name	PATTERSON COMPANIES, INC.
Entity Central Index Key	0000891024
Current Fiscal Year End Date	--04-27
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		95,319,000
Entity Public Float			$ 2,150