v3.26.1
Financial Instruments - Narrative (Details)
€ in Millions, $ in Millions
3 Months Ended
Mar. 31, 2026
USD ($)
Mar. 31, 2026
EUR (€)
Mar. 31, 2026
USD ($)
Dec. 31, 2025
USD ($)
Derivative Instruments, Gain (Loss) [Line Items]        
Accounts receivables factored | $     $ 216 $ 217
Contingent Consideration Acquired        
Derivative Instruments, Gain (Loss) [Line Items]        
Fair value adjustment | $ $ 12      
Minimum | Measurement Input, Discount Rate        
Derivative Instruments, Gain (Loss) [Line Items]        
Contingent consideration discount rates   0.0518 0.0518  
Maximum | Measurement Input, Discount Rate        
Derivative Instruments, Gain (Loss) [Line Items]        
Contingent consideration discount rates   0.0678 0.0678  
Euro Denominated Term Loan B Facility | Senior Notes        
Derivative Instruments, Gain (Loss) [Line Items]        
Face amount of debt | €   € 707    
2.875% Senior Secured Notes Due 2028 | Senior Notes        
Derivative Instruments, Gain (Loss) [Line Items]        
Face amount of debt | €   € 1,250    
Stated interest rate   2.875% 2.875%  
2.875% Senior Secured Notes Due 2028 | Senior Notes | Organon Finance 1 LLC        
Derivative Instruments, Gain (Loss) [Line Items]        
Face amount of debt | €   € 1,250    
Foreign Exchange Forward        
Derivative Instruments, Gain (Loss) [Line Items]        
Notional amount | $     $ 1,900 $ 1,700
Cross Currency Interest Rate Contract, Euro-Denominated Debt Instruments | 2034 Notes        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivate fixed interest rate   5.833% 5.833%  
Cross Currency Interest Rate Contract, Euro-Denominated Debt Instruments | Euro-Denominated Subsidiaries        
Derivative Instruments, Gain (Loss) [Line Items]        
Notional amount | €   € 922    
Cross Currency Interest Rate Contract, U.S. Dollar-Denominated Debt Instruments | 2034 Notes        
Derivative Instruments, Gain (Loss) [Line Items]        
Notional amount | $     $ 1,000  
Derivate fixed interest rate   7.3125% 7.3125%