v3.26.1
Cover Page - shares
 3 Months Ended
Mar. 31, 2026
Jun. 01, 2026
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 001-43207  
Entity Registrant Name ENVIRI CORP  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 41-2897233  
Entity Address, Address Line One Two Logan Square100-120 North 18th Street, 17th Floor,  
Entity Address, City or Town Philadelphia,  
Entity Address, State or Province PA  
Entity Address, Postal Zip Code 19103  
City Area Code 267  
Local Phone Number 857-8715  
Entity Information, Former Legal or Registered Name Enviri II Corporation  
Title of 12(b) Security Common stock, par value $0.00001 per share  
Trading Symbol NVRI  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   28,103,750
Entity Central Index Key 0002104052  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Amendment Flag false