v3.19.3
Document and Entity Information Document - shares
3 Months Ended 6 Months Ended
Sep. 30, 2019
Sep. 30, 2019
Nov. 01, 2019
Entity Information [Line Items]      
Document Transition Report false false  
Title of 12(b) Security   Ordinary Shares, $0.001 par value  
Entity Incorporation, State or Country Code   L2  
Document Quarterly Report   true  
Entity Registrant Name   STERIS plc  
Local Phone Number   232 2000  
Entity Central Index Key   0001757898  
Document Type   10-Q  
Entity File Number   001-38848  
Document Period End Date   Sep. 30, 2019  
Amendment Flag   false  
Document Fiscal Year Focus   2020  
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     84,783,115
Entity Small Business   false  
Entity Emerging Growth Company   false  
Entity Tax Identification Number   98-1455064  
Entity Address, Address Line One   70 Sir John Rogerson's Quay,  
Entity Address, City or Town   Dublin 2,  
Country Region   353  
City Area Code   1  
Entity Address, State or Province   IE  
Entity Address, Postal Zip Code   D02 R296  
Trading Symbol   STE  
Security Exchange Name   NYSE  
Entity Interactive Data Current   Yes  
Entity Shell Company   false