v3.25.4
Long-Term Debt - Additional Information (Details)
$ / shares in Units, € in Millions
12 Months Ended
Aug. 04, 2025
Aug. 04, 2020
USD ($)
$ / shares
shares
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
EUR (€)
Dec. 31, 2025
EUR (€)
Jun. 01, 2021
EUR (€)
Dec. 31, 2020
EUR (€)
Aug. 01, 2017
EUR (€)
Debt Instrument [Line Items]                    
Proceeds from long-term debt     $ 0 $ 300,000,000 $ 329,000,000          
Medium term credit facilities                    
Debt Instrument [Line Items]                    
Unutilized committed medium term credit facilities     640,000,000              
Support R&D and capital expenditure programs                    
Debt Instrument [Line Items]                    
Line of credit outstanding amount | €           € 600 € 1,000      
Bank loans (including current portion)     552,000,000              
Proceeds from long-term debt       $ 300,000,000   300        
Support R&D and capital expenditure programs | First Tranche                    
Debt Instrument [Line Items]                    
Line of credit outstanding amount | €             € 500      
Support R&D and capital expenditure programs | Europe Union                    
Debt Instrument [Line Items]                    
Line of credit outstanding amount | €                   € 500
Bank loans (including current portion)     205,000,000              
Support R&D and capital expenditure programs | Italy and France                    
Debt Instrument [Line Items]                    
Line of credit outstanding amount | €                 € 500  
Bank loans (including current portion)     352,000,000              
New facility agreement with CDP one                    
Debt Instrument [Line Items]                    
Line of credit outstanding amount | €               € 150    
Bank loans (including current portion)     44,000,000              
New facility agreement with CDP two                    
Debt Instrument [Line Items]                    
Line of credit outstanding amount | €           € 200        
Bank loans (including current portion)     $ 126,000,000              
Dual tranche senior unsecured convertible bonds                    
Debt Instrument [Line Items]                    
Net proceeds from issuance of senior unsecured convertible bonds   $ 1,567,000,000                
Dual tranche senior unsecured convertible bonds | Dual tranche senior unsecured convertible bonds                    
Debt Instrument [Line Items]                    
Debt instrument principal amount   $ 1,500,000,000                
zero-coupon, due 2025 ("Tranche A")                    
Debt Instrument [Line Items]                    
Senior unsecured convertible bonds conversion premium rate   47.50%                
Debt conversion, converted instrument, shares issued (in shares) | shares   4,585                
Debt conversion, bond par value   $ 200,000                
zero-coupon, due 2025 ("Tranche A") | Dual tranche senior unsecured convertible bonds                    
Debt Instrument [Line Items]                    
Debt instrument principal amount   $ 750,000,000                
Percentage at which bonds issued   105.80%                
Senior unsecured convertible bonds conversion price (in USD per share) | $ / shares   $ 43.62                
zero-coupon, due 2027 ("Tranche B")                    
Debt Instrument [Line Items]                    
Senior unsecured convertible bonds conversion price (in USD per share) | $ / shares   $ 45.10                
Senior unsecured convertible bonds conversion premium rate   52.50%                
Debt conversion, converted instrument, shares issued (in shares) | shares   4,435                
Debt conversion, bond par value   $ 200,000                
Contingent feature of conversion price 1.30                  
zero-coupon, due 2027 ("Tranche B") | Dual tranche senior unsecured convertible bonds                    
Debt Instrument [Line Items]                    
Debt instrument principal amount   $ 750,000,000                
Percentage at which bonds issued   104.50%