v3.5.0.2
Document and Entity Information Document - shares
6 Months Ended
Sep. 30, 2016
Nov. 02, 2016
Entity Information [Line Items]    
Entity Registrant Name STERIS plc  
Entity Central Index Key 0001624899  
Document Type 10-Q  
Document Period End Date Sep. 30, 2016  
Amendment Flag false  
Document Fiscal Year Focus 2017  
Document Fiscal Period Focus Q2  
Current Fiscal Year End Date --03-31  
Entity Current Reporting Status Yes  
Entity Filer Category Large Accelerated Filer  
Entity Common Stock, Shares Outstanding   85,199,072