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Cover Page - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Feb. 16, 2023
Jun. 30, 2022
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2022    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-36569    
Entity Registrant Name LANTHEUS HOLDINGS, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 35-2318913    
Entity Address, Address Line One 201 Burlington Road, South Building    
Entity Address, City or Town Bedford    
Entity Address, State or Province MA    
Entity Address, Postal Zip Code 01730    
City Area Code 978    
Local Phone Number 671-8001    
Title of 12(b) Security Common Stock, $0.01 par value per share    
Trading Symbol LNTH    
Security Exchange Name NASDAQ    
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    
Entity Shell Company false    
Entity Public Float     $ 4,487.0
Entity Common Stock, Shares Outstanding   67,540,065  
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE
Listed hereunder are the documents, portions of which are incorporated by reference, and the parts of this Form 10-K into which such portions are incorporated:
The Registrant’s Definitive Proxy Statement for use in connection with the Annual Meeting of Stockholders to be held on April 27, 2023, portions of which are incorporated by reference into Parts II and III of this Form 10-K. The 2023 Proxy Statement will be filed with the Securities and Exchange Commission no later than 120 days after the close of our year ended December 31, 2022.
   
Amendment Flag false    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001521036