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Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2023
Feb. 08, 2024
Jun. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-31225    
Entity Registrant Name ENPRO INC.    
Entity Incorporation, State or Country Code NC    
Entity Tax Identification Number 01-0573945    
Entity Address, Street Address 5605 Carnegie Boulevard    
Entity Address, Suite Suite 500    
Entity Address, City Charlotte    
Entity Address, State NC    
Entity Address, Postal Zip Code 28209    
City Area Code 704    
Local Phone Number 731-1500    
Title of each class Common stock, $0.01 par value    
Trading Symbol(s) NPO    
Name of each exchange on which registered 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 [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 2,772,553,359
Entity Common Stock, Shares Outstanding   21,086,776  
Documents Incorporated by Reference
Portions of the registrant’s definitive proxy statement for the 2024 annual meeting of shareholders are incorporated by reference into Part III.
    
Amendment Flag false    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001164863