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Long-Term Debt - Additional Information (Details)
$ / shares in Units, € in Millions
12 Months Ended
Aug. 04, 2020
USD ($)
$ / shares
shares
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2022
USD ($)
Dec. 31, 2022
EUR (€)
Jun. 01, 2021
EUR (€)
Dec. 31, 2020
EUR (€)
Aug. 01, 2017
EUR (€)
Debt Instrument [Line Items]                
Proceeds from long-term debt   $ 300,000,000 $ 329,000,000 $ 200,000,000        
Medium term credit facilities                
Debt Instrument [Line Items]                
Unutilized committed medium term credit facilities   634,000,000            
Support R&D and capital expenditure programs                
Debt Instrument [Line Items]                
Line of credit outstanding amount | €         € 600      
Bank loans (including current portion)   581,000,000            
Proceeds from long-term debt   300,000,000     300      
Support R&D and capital expenditure programs | Europe Union                
Debt Instrument [Line Items]                
Line of credit outstanding amount | €               € 500
Bank loans (including current portion)   233,000,000            
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)   364,000,000            
New facility agreement with CDP one                
Debt Instrument [Line Items]                
Line of credit outstanding amount | €           € 150    
Bank loans (including current portion)   65,000,000            
New facility agreement with CDP two                
Debt Instrument [Line Items]                
Line of credit outstanding amount | €         € 200      
Bank loans (including current portion)   $ 143,000,000            
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              
Contingent feature of conversion price 1.30              
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              
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%