v3.26.1
Cover - shares
 6 Months Ended
Jun. 30, 2026
Jul. 30, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Jun. 30, 2026  
Document Transition Report false  
Entity File Number 001-39729  
Entity Registrant Name SOTERA HEALTH COMPANY  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 47-3531161  
Entity Address, Address Line One 9100 South Hills Blvd  
Entity Address, Address Line Two Suite 300  
Entity Address, City or Town Broadview Heights  
Entity Address, State or Province OH  
Entity Address, Postal Zip Code 44147  
City Area Code 440  
Local Phone Number 262-1410  
Title of 12(b) Security Common Stock, $0.01 par value per share  
Trading Symbol SHC  
Security Exchange Name NASDAQ  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   285,374,795
Entity Central Index Key 0001822479  
Current Fiscal Year End Date --12-31  
Amendment Flag false  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q2