v3.22.2.2
Cover Page - shares
 9 Months Ended
Sep. 30, 2022
Oct. 25, 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 001-33497  
Entity Registrant Name Amicus Therapeutics, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 71-0869350  
Entity Address, Address Line One 3675 Market Street,  
Entity Address, City or Town Philadelphia,  
Entity Address, State or Province PA  
Entity Address, Postal Zip Code 19104  
City Area Code (215)  
Local Phone Number 921-7600  
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol FOLD  
Security Exchange Name NASDAQ  
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  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding (in shares)   280,945,247
Entity Central Index Key 0001178879  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2022  
Document Fiscal Period Focus Q3