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Long-Term Debt (Tables) | 12 Months Ended
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Dec. 31, 2023
Debt Disclosure [Abstract] |
Long-Term Debt | Long-term debt consisted of the following:
|  | December 31, |  | December 31,
|  | 2023 |  | 2022
Funding program loans from European Investment Bank ("EIB"): |  |  |  |
4.72% due 2028, floating interest rate at Euribor +0.589% |  | 141 |  |  | 163 |
4.52% due 2029, floating interest rate at Euribor +0.564% |  | 162 |  |  | 183 |
4.47% due 2031, floating interest rate at Euribor +0.473% |  | 296 |  |  | 322 |
4.54% due 2031, floating interest rate at Euribor +0.550% |  | 146 |  |  | 159 |
4.52% due 2033, floating interest rate at Euribor +0.558% |  | 332 |  |  | — |
Credit Facility from Cassa Depositi e Prestiti SpA ("CDP") |  |  |  |
4.64% due 2027, floating interest rate at Euribor +0.690% |  | 97 |  |  | 120 |
4.49% due 2028, floating interest rate at Euribor +0.550% |  | 92 |  |  | 107 |
4.79% due 2029, floating interest rate at Euribor +0.850% |  | 95 |  |  | 107 |
Dual tranche senior unsecured convertible bonds |  |  |  |
zero-coupon, due 2025 (Tranche A) |  | 748 |  |  | 748 |
zero-coupon, due 2027 (Tranche B) |  | 748 |  |  | 747 |
Finance leases: |  |  |  |
3.86% due 2027, fixed interest rate |  | 38 |  |  | 38 |
3.78% due 2042, fixed interest rate |  | 25 |  |  | 19 |
1.75% due 2042, fixed interest rate |  | 2 |  |  | — |
Other funding program loans: |  |  |  |
0.29% (weighted average), due 2024-2028, fixed interest rate |  | 5 |  |  | 4 |
Total long-term debt |  | 2,927 |  |  | 2,717 |
Less current portion |  | (217) |  |  | (175) |
Total long-term debt, less current portion |  | 2,710 |  |  | 2,542 |
Long-Term Debt Denominated by Currencies | Long-term debt is denominated in the following currencies:
|  | December 31, 2023 |  | December 31, 2022
U.S. dollar |  | 1,496 |  |  | 1,495 |
Euro |  | 1,431 |  |  | 1,222 |
Total |  | 2,927 |  |  | 2,717 |
Total Long-Term Debt Outstanding Maturities | Aggregate future maturities of total long-term debt (including current portion) at principal amount are as follows:
|  | December 31,
|  | 2023
2024 |  | 217 |
2025 |  | 962 |
2026 |  | 212 |
2027 |  | 947 |
2028 |  | 198 |
Thereafter |  | 395 |
Total |  | 2,931 |

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