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Long-Term Debt - Additional Information (Detail)
$ / shares in Units, € in Millions
Aug. 04, 2020
USD ($)
$ / shares
shares
Jan. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Dec. 31, 2023
EUR (€)
Dec. 31, 2022
EUR (€)
Jun. 01, 2021
EUR (€)
Dec. 31, 2020
EUR (€)
Aug. 01, 2017
EUR (€)
Medium term credit facilities                
Debt Instrument [Line Items]                
Unutilized committed medium term credit facilities     $ 1,030,000,000          
Support R&D and capital expenditure programs                
Debt Instrument [Line Items]                
Line of credit outstanding amount | €         € 600      
Amount outstanding     332,000,000          
Credit facility amount withdrawn | €       € 300        
Support R&D and capital expenditure programs | Subsequent event                
Debt Instrument [Line Items]                
Credit facility amount withdrawn   $ 300,000,000            
Support R&D and capital expenditure programs | Europe Union                
Debt Instrument [Line Items]                
Line of credit outstanding amount | €               € 500
Amount outstanding     303,000,000          
Support R&D and capital expenditure programs | Italy and France                
Debt Instrument [Line Items]                
Line of credit outstanding amount | €             € 500  
Amount outstanding     442,000,000          
New facility agreement with CDP one                
Debt Instrument [Line Items]                
Line of credit outstanding amount | €           € 150    
Amount outstanding     97,000,000          
New facility agreement with CDP two                
Debt Instrument [Line Items]                
Line of credit outstanding amount | €         € 200      
Amount outstanding     $ 187,000,000          
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              
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%              
Dual tranche senior unsecured convertible bonds                
Debt Instrument [Line Items]                
Contingent feature of conversion price 1.30