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Indebtedness (Tables) | 12 Months Ended
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Dec. 31, 2023
Debt Disclosure [Abstract] |
Components of Long-term Debt | Long-term debt consisted of the following at December 31, 2023 and 2022 (in millions):
| December 31, 2023 |  | December 31, 2022
Credit facility, expires 2027 | $ | — |  |  | $ | 200.0 |
1.002% EIB Senior term loan due 2025 | 276.7 |  |  | 267.3 |
EIB Senior Term Loan due 2029 | 276.7 |  | — |
Senior term loans due between 2023 and 2028 | 162.1 |  |  | 341.6 |
0.800% Senior Notes Due 2028 | 664.0 |  |  | 641.5 |
Other long-term debt | 3.1 |  |  | 5.1 |
Debt issuance costs | (3.1) |  |  | (3.6) |
| 1,379.5 |  |  | 1,451.9 |
Less: Senior term loans due 2023, net of debt issuance costs | — |  |  | (184.9) |
Current portion of other long-term debt | (2.3) |  |  | (2.2) |
Total long-term indebtedness | $ | 1,377.2 |  |  | $ | 1,264.8 |
Maturities of Long-term Debt | At December 31, 2023, the aggregate scheduled maturities of long-term debt, excluding the current portion of long-term debt, are as follows (in millions):
2025 | $ | 346.3 |
2026 | 58.2 |
2027 | 0.2 |
2028 | 698.4 |
Thereafter | 274.1 |
| $ | 1,377.2 |

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- Definition Tabular disclosure of information pertaining to short-term and long-debt instruments or arrangements, including but not limited to identification of terms, features, collateral requirements and other information necessary to a fair presentation. + References No definition available. + Details
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