Annual report pursuant to Section 13 and 15(d)

Cover Page

Cover Page - USD ($)
4 Months Ended
Dec. 31, 2020
Mar. 18, 2021
Document Information [Line Items]    
Document Type 10-K  
Document Annual Report true  
Document Transition Report false  
Amendment Flag false  
Entity Interactive Data Current Yes  
Document Period End Date Dec. 31, 2020  
Document Fiscal Year Focus 2020  
Document Fiscal Period Focus FY  
Entity Registrant Name Investindustrial Acquisition Corp.  
Entity Central Index Key 0001825042  
Entity File Number 001-39720  
Entity Tax Identification Number 98-1556465  
Entity Incorporation, State or Country Code E9  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Shell Company true  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Address, Address Line One Suite 1  
Entity Address, Address Line Two 3rd Floor  
Entity Address, Address Line Three 11-12 St James’s Square  
Entity Address, City or Town London  
Entity Address, Country GB  
Entity Address, Postal Zip Code SW1Y 4LB  
Local Phone Number +44 20 7400 3333  
Title of 12(b) Security Shares of Class A Ordinary Shares included as part of the units  
Trading Symbol IIAC  
Security Exchange Name NYSE  
Entity Well-known Seasoned Issuer No  
Entity Voluntary Filers No  
Entity Public Float $ 414,977,500  
ICFR Auditor Attestation Flag false  
Common Class A [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   40,250,000
Common Class B [Member]    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   10,062,500
Capital Units [Member]    
Document Information [Line Items]    
Title of 12(b) Security Units, each consisting of one Class A ordinary share, $0.0001 par value, and one-third of one warrant  
Trading Symbol IIAC.U  
Security Exchange Name NYSE  
Warrant [Member]    
Document Information [Line Items]    
Title of 12(b) Security Redeemable warrants included as part of the units, each whole warrant exercisable for one share of Class A Ordinary Share at an exercise price of 11.5  
Trading Symbol IIAC WS  
Security Exchange Name NYSE