Quarterly report pursuant to Section 13 or 15(d)


Cover - shares
9 Months Ended
Sep. 30, 2022
Nov. 10, 2022
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2022  
Document Transition Report false  
Entity File Number 001-39982  
Entity Registrant Name ENERGY VAULT HOLDINGS, INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 85-3230987  
Entity Address, Address Line One 4360 Park Terrace Drive  
Entity Address, Address Line Two Suite 100  
Entity Address, City or Town Westlake Village  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 91361  
City Area Code 805  
Local Phone Number 852-0000  
Title of 12(b) Security Common Stock, par value $0.0001 per share  
Trading Symbol NRGV  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   138,268,342
Entity Central Index Key 0001828536  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2022  
Document Fiscal Period Focus Q3  
Amendment Flag false