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Debt Obligations (Tables) | 12 Months Ended
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Dec. 31, 2022
Debt Disclosure [Abstract] |
Schedule of Debt and Finance Lease Obligations | Debt obligations, including finance lease obligations, as of the periods indicated consisted of the following (in millions):
| Years Ended December 31,
Infrastructure | 2022 |  | 2021
3.25% Note due 2026 | $ | 99.5 |  |  | $ | 107.2 |
Line of Credit due 2024 (PRIME minus 0.85% and PRIME minus 1.10% as of December 31, 2022, and 2021, respectively) | 107.7 |  |  | 30.4 |
4.00% Note due 2024 | 15.0 |  |  | 25.0 |
8.00% Note due 2024 | 18.7 |  |  | 19.6 |
11.00% Note due 2024 | — |  |  | 6.3 |
Obligations under finance leases | 2.1 |  |  | 0.1 |
Total Infrastructure | $ | 243.0 |  |  | $ | 188.6 |
Spectrum |  |  |
8.50% Note due 2024 | 19.3 |  |  | — |
11.45% Note due 2024 | 50.4 |  |  | — |
8.50% Note due 2022 | — |  |  | 19.3 |
10.50% Note due 2022 | — |  |  | 32.9 |
Total Spectrum | $ | 69.7 |  |  | $ | 52.2 |
Life Sciences |  |  |
18.00% Note due 2023 | 10.8 |  |  | — |
Total Life Sciences | $ | 10.8 |  |  | $ | — |
Non-Operating Corporate |  |  |
8.50% Senior Secured Notes, due 2026 | 330.0 |  |  | 330.0 |
7.50% Convertible Senior Notes, due 2026 | 51.8 |  |  | 51.8 |
7.50% Convertible Senior Notes, due 2022 | — |  |  | 3.2 |
LIBOR plus 5.75% Line of Credit, due 2024 | 20.0 |  |  | 5.0 |
Total Non-Operating Corporate | $ | 401.8 |  |  | $ | 390.0 |
Total outstanding principal | $ | 725.3 |  |  | $ | 630.8 |
Unamortized issuance discount, issuance premium, and deferred financing costs | (10.9) |  |  | (4.5) |
Less: current portion of debt obligations | (30.6) |  |  | (69.5) |
Debt obligations | $ | 683.8 |  |  | $ | 556.8 |
Schedule of Maturities of Debt and Finance Lease Obligations | Aggregate finance lease and debt payments, including interest, as of December 31, 2022, were as follows (in millions):
|  | Finance Leases |  | Debt |  | Total
2023 |  | $ | 1.8 |  |  | $ | 74.9 |  |  | $ | 76.7 |
2024 |  | 0.3 |  |  | 274.5 |  |  | 274.8 |
2025 |  | 0.1 |  |  | 41.8 |  |  | 41.9 |
2026 |  | — |  |  | 469.8 |  |  | 469.8 |
2027 |  | — |  |  | — |  |  | — |
Thereafter |  | — |  |  | — |  |  | — |
Total minimum principal and interest payments |  | 2.2 |  |  | 861.0 |  |  | 863.2 |
Less: Amount representing interest |  | (0.1) |  |  | (137.8) |  |  | (137.9) |
Total aggregate finance lease and debt payments |  | $ | 2.1 |  |  | $ | 723.2 |  |  | $ | 725.3 |

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