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Goodwill and Intangibles, Net (Tables) | 3 Months Ended
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Mar. 31, 2024
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of the Changes in the Carrying Amount of Goodwill by Reporting Unit | The carrying amounts of goodwill by segment were as follows (in millions):
|  | Infrastructure |  | Spectrum |  | Total
Balance at December 31, 2023 |  | $ | 105.7 |  |  | $ | 21.4 |  |  | $ | 127.1 |
Translation |  | (0.2) |  |  | — |  |  | (0.2) |
Balance as of March 31, 2024 |  | $ | 105.5 |  |  | $ | 21.4 |  |  | $ | 126.9 |
Schedule of Indefinite-Lived Intangible Assets | The carrying amounts of indefinite-lived intangible assets were as follows (in millions):
|  | March 31, 2024 |  | December 31, 2023
FCC licenses |  | $ | 106.3 |  |  | $ | 106.3 |
Total |  | $ | 106.3 |  |  | $ | 106.3 |
Schedule of Intangible Assets Subject to Amortization | The gross carrying amounts and accumulated amortization of definite lived intangible assets by major intangible asset class were as follows (in millions):
|  | Weighted-Average Original Useful Life |  | March 31, 2024 |  | December 31, 2023
|  |  | Gross Carrying Amount | Accumulated Amortization | Net |  | Gross Carrying Amount | Accumulated Amortization | Net
Trade names |  | 15 years |  | $ | 25.1 |  |  | $ | (9.7) |  |  | $ | 15.4 |  |  | $ | 25.2 |  |  | $ | (9.4) |  |  | $ | 15.8 |
Customer relationships and contracts |  | 11 years |  | 87.5 |  |  | (45.3) |  |  | 42.2 |  |  | 87.6 |  |  | (44.2) |  |  | 43.4 |
Channel sharing arrangements |  | 35 years |  | 12.6 |  |  | (1.9) |  |  | 10.7 |  |  | 12.6 |  |  | (1.8) |  |  | 10.8 |
Other |  | 12 years |  | 3.9 |  |  | (1.4) |  |  | 2.5 |  |  | 3.9 |  |  | (1.3) |  |  | 2.6 |
Total |  |  |  | $ | 129.1 |  |  | $ | (58.3) |  |  | $ | 70.8 |  |  | $ | 129.3 |  |  | $ | (56.7) |  |  | $ | 72.6 |

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