Description of Business	3 Months Ended
Description of Business	Mar. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	Description of Business Amicus Therapeutics, Inc. (the "Company") is a global, patient-dedicated biotechnology company focused on discovering, developing, and delivering novel medicines for rare diseases. The Company has a portfolio including the first, oral monotherapy for Fabry disease that has achieved widespread global approval and a differentiated biologic for Pompe disease, that is under regulatory review. The Company is committed to discovering and developing next generation therapies in Fabry and Pompe diseases. The cornerstone of the Company's portfolio is Galafold® (also referred to as "migalastat"), the first and only approved oral precision medicine for people living with Fabry disease who have amenable genetic variants. Migalastat is currently approved under the trade name Galafold® in the United States ("U.S."), European Union ("E.U."), United Kingdom ("U.K."), and Japan, with multiple additional approvals granted and applications pending in several geographies around the world. The lead biologics program of the Company's pipeline is Amicus Therapeutics GAA ("AT-GAA", also known as ATB200/AT2221, or cipaglucosidase alfa/miglustat), a novel, two-component, potential best-in-class treatment for Pompe disease. AT-GAA is currently under review with regulatory authorities. In October 2022, the U.S. Food and Drug Administration ("FDA") deferred action on the BLA for cipaglucosidase alfa, citing the inability to complete the manufacturing site inspection prior to the PDUFA action date. In the second quarter of 2023, the FDA completed the required pre-approval inspection of the manufacturing site. The Company believes the comments and observations received at the close of the FDA inspection are all addressable. In March 2023, the European Commission ("EC") granted approval for Pombiliti™ (cipaglucosidase alfa) to be used in combination with miglustat for adults with late-onset Pompe disease ("LOPD"). In April 2023, the Committee for Medicinal Products for Human Use of the European Medicines Agency adopted a positive opinion on Opfolda™ (miglustat), the enzyme stabilizer component of AT-GAA. The regulatory submission process for AT-GAA in the U.K. was initiated in December 2022. The Company continues to monitor the novel coronavirus (“COVID-19”) pandemic. The Company's commercial operations have not been significantly impacted by the COVID-19 pandemic and the Company gradually continues to see an improvement in patient identification and Galafold® initiation. The Company has maintained operations in all geographies, secured its global supply chain for its commercial and clinical products, as well as maintained the operational integrity of its clinical trials, with minimum disruptions. The Company has been able to continue to meet required commercial demand for Galafold® as well as supply its ongoing Pompe disease clinical studies and access programs including the Early Access to Medicines Scheme ("EAMS") without interruption. In regard to the Company's regulatory operations, the FDA deferred action on the pending BLA for cipaglucosidase alfa, as a site inspection was necessary, however, could not be completed by the PDUFA action date due to COVID-19 pandemic related travel restrictions. In the second quarter of 2023, the FDA completed the required pre-approval inspection of the manufacturing site. Per FDA guidance related to pre-approval inspections during the COVID-19 pandemic, receipt of a deferral action indicates no deficiencies have been identified and the application otherwise satisfies the requirements for approval. The Company had an accumulated deficit of $2.6 billion as of March 31, 2023 and anticipates incurring losses through the fiscal year ending December 31, 2023. The Company has historically funded its operations through stock offerings, Galafold® revenues, debt issuances, collaborations, and other financing arrangements. Based on its current operating model, the Company believes that the current cash position, which includes expected revenues, is sufficient to fund the Company's operations and ongoing research programs for at least the next 12 months. Potential impacts of the COVID-19 pandemic, business development collaborations, pipeline expansion, and investment in manufacturing capabilities could impact the Company's future capital requirements.