Document and Entity Information - USD ($)
 3 Months Ended
Mar. 31, 2018
Apr. 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 Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 4,704,253,988
Entity Common Stock, Shares Outstanding   40,554,620  
Document Fiscal Year Focus 2018    
Document Fiscal Period Focus Q1    
Document Type 10-Q    
Amendment Flag false    
Document Period End Date Mar. 31, 2018