XML 7 R1.htm IDEA: XBRL DOCUMENT v3.25.3
Document and Entity Information - shares
 9 Months Ended
Sep. 30, 2025
Oct. 29, 2025
Cover [Abstract]    
Document Type 10-Q  
Amendment Flag false  
Document Period End Date Sep. 30, 2025  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q3  
Trading Symbol EEX  
Entity Registrant Name Emerald Holding, Inc.  
Entity Central Index Key 0001579214  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Shell Company false  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Common Stock, Shares Outstanding   197,807,355
Title of 12(b) Security Common Stock, par value $0.01 per share  
Security Exchange Name NYSE  
Entity File Number 001-38076  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 42-1775077  
Entity Address, Address Line One 100 Broadway  
Entity Address, Address Line Two 14th Floor  
Entity Address, City or Town New York  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10005  
City Area Code 949  
Local Phone Number 226-5700  
Document Quarterly Report true  
Document Transition Report false