v3.26.1
DEBT - Narrative (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Apr. 30, 2026
Feb. 28, 2026
Jun. 30, 2026
Jun. 30, 2026
Dec. 31, 2025
Debt Instrument [Line Items]          
Debt outstanding     $ 4,250,000,000 $ 4,250,000,000 $ 600,000,000
5.5% senior unsecured notes due in February 2034 (the 2034 Notes) | Senior Notes          
Debt Instrument [Line Items]          
Debt outstanding     $ 850,000,000 $ 850,000,000 $ 0
Debt instrument, aggregate principal amount   $ 850,000,000.0      
Debt issuance costs   $ 17,700,000      
Debt stated interest rate   5.50% 5.50% 5.50% 5.50%
Net proceeds from the offering   $ 832,300,000      
Secured Debt | 2026 Credit Agreement | Line of Credit          
Debt Instrument [Line Items]          
Debt issuance costs $ 46,200,000        
Secured Debt | Senior Secured Term Loan A Facility | Line of Credit          
Debt Instrument [Line Items]          
Debt outstanding     $ 800,000,000 $ 800,000,000 $ 0
Debt instrument, aggregate principal amount $ 800,000,000.0        
Quarterly principal repayment, percentage of principal 1.25%        
Secured Debt | Senior Secured Term Loan B Facility | Line of Credit          
Debt Instrument [Line Items]          
Debt outstanding     2,000,000,000 2,000,000,000 0
Debt instrument, aggregate principal amount $ 2,000,000,000.0        
Quarterly principal repayment, percentage of principal 0.25%        
Revolving Credit Facility | Senior Secured Revolving Credit Facility | Line of Credit          
Debt Instrument [Line Items]          
Maximum borrowing capacity $ 600,000,000.0        
Borrowings outstanding     0 0  
Remaining borrowing capacity     600,000,000.0 600,000,000.0  
Amicus Therapeutics | 5.5% senior unsecured notes due in February 2034 (the 2034 Notes) | Senior Notes          
Debt Instrument [Line Items]          
Debt instrument, aggregate principal amount   $ 850,000,000.0      
Debt stated interest rate   5.50%      
Amicus Therapeutics | 364-Day Senior Secured Bridge Facility | Bridge Loan          
Debt Instrument [Line Items]          
Debt instrument, aggregate principal amount $ 0 $ 2,800,000,000     $ 3,700,000,000
Commitment fees     $ 17,500,000 $ 22,800,000