v3.26.1
Long-Term Debt and Short-Term Borrowings - Schedule of Long-term Debt Instruments (Details)
€ in Millions, $ in Millions
3 Months Ended
Mar. 31, 2026
USD ($)
Mar. 31, 2026
EUR (€)
Dec. 31, 2025
USD ($)
Dec. 31, 2025
EUR (€)
Debt Instrument [Line Items]        
Other (discounts and debt issuance costs) $ (77)   $ (81)  
Total principal long-term debt and short-term borrowings 8,569   8,644  
Less: Current portion of long-term debt and short-term borrowings 16   16  
Total Long-term debt, net of current portion 8,553   8,628  
Revenue Interest Purchase and Sale Agreement        
Debt Instrument [Line Items]        
Long-term debt 181   179  
Remaining principal amount 156      
Notes Payable, Other Payables        
Debt Instrument [Line Items]        
Long-term debt 8   8  
Term Loan B Facility | Senior Notes        
Debt Instrument [Line Items]        
Long-term debt $ 1,522   1,543  
Spread on variable rate 2.25%      
Euro Denominated Term Loan B | Senior Notes        
Debt Instrument [Line Items]        
Long-term debt $ 814   843  
Spread on variable rate 2.75%      
Face amount of debt | €   € 707   € 717
4.125% secured notes due 2028 | Senior Notes        
Debt Instrument [Line Items]        
Long-term debt $ 2,100   2,100  
Stated interest rate 4.125% 4.125%    
2.875% Senior Secured Notes Due 2028 | Senior Notes        
Debt Instrument [Line Items]        
Long-term debt $ 1,439   1,470  
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        
Debt Instrument [Line Items]        
Face amount of debt | €   € 1,250    
5.125% notes due 2031 | Senior Notes        
Debt Instrument [Line Items]        
Long-term debt $ 1,582   1,582  
Stated interest rate 5.125% 5.125%    
6.750% secured notes due 2034 | Senior Notes        
Debt Instrument [Line Items]        
Long-term debt $ 500   500  
Stated interest rate 6.75% 6.75%    
7.875% notes due 2034 | Senior Notes        
Debt Instrument [Line Items]        
Long-term debt $ 500   $ 500  
7.875% notes due 2034 | Senior Notes | Organon Finance 1 LLC        
Debt Instrument [Line Items]        
Stated interest rate 7.875% 7.875%