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Cover - USD ($)
 12 Months Ended
Dec. 31, 2025
Feb. 17, 2026
Jun. 30, 2025
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Transition Report false    
Entity File Number 001-03970    
Entity Registrant Name ENVIRI CORPORATION    
Entity Tax Identification Number 23-1483991    
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    
Title of 12(b) Security Common stock, par value $1.25 per share    
Trading Symbol NVRI    
Security Exchange Name NYSE    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
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    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction true    
Entity Shell Company false    
Entity Public Float     $ 658,403,701
Entity Common Stock, Shares Outstanding   81,449,498  
Current Fiscal Year End Date --12-31    
Entity Central Index Key 0000045876    
Document Period End Date Dec. 31, 2025    
Document Fiscal Year Focus 2025    
Document Fiscal Period Focus FY    
Amendment Flag false    
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE
Selected portions of the 2026 Proxy Statement are incorporated by reference into Part III of this Report.
    
Entity Incorporation, State or Country Code DE    
Document Financial Statement Restatement Recovery Analysis [Flag] true