v3.10.0.1
Document and Entity Information - shares
3 Months Ended
Jun. 30, 2018
Jul. 27, 2018
Document and Entity Information [Abstract]    
Entity Registrant Name Prestige Brands Holdings, Inc.  
Entity Central Index Key 0001295947  
Current Fiscal Year End Date --03-31  
Entity Filer Category Large Accelerated Filer  
Document Type 10-Q  
Document Period End Date Jun. 30, 2018  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   51,733,565