Document and Entity Information - USD ($)	9 Months Ended
	Sep. 30, 2018	Oct. 25, 2018	Jun. 30, 2017
Entity [Abstract]
Entity Registrant Name	POOL CORP
Entity Central Index Key	0000945841
Current Fiscal Year End Date	--12-31
Entity Current Reporting Status	Yes
Entity Filer Category	Large Accelerated Filer
Entity Public Float			$ 4,704,253,988
Entity Common Stock, Shares Outstanding		40,263,296
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q3
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 30, 2018
Entity Emerging Growth Company	false
Entity Small Business	false