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Goodwill and Intangibles, net (Tables)
6 Months Ended
Jun. 30, 2022
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of the Changes in the Carrying Amount of Goodwill by Reporting Unit
The carrying amount of goodwill by segment was as follows (in millions):
 
Infrastructure
SpectrumTotal
Balance at December 31, 2021$106.0 $21.4 $127.4 
Translation(0.3)— (0.3)
Balance at June 30, 2022$105.7 $21.4 $127.1 
Schedule of Indefinite-Lived Intangible Assets
The carrying amount of indefinite-lived intangible assets was as follows (in millions):
June 30, 2022December 31, 2021
FCC licenses$106.4 $106.5 
Total$106.4 $106.5 
Schedule of Intangible Assets Subject to Amortization
The gross carrying amount and accumulated amortization of definite lived intangible assets by major intangible asset class were as follows (in millions):
Weighted-Average Original Useful LifeJune 30, 2022December 31, 2021
Gross Carrying AmountAccumulated AmortizationNetGross Carrying AmountAccumulated AmortizationNet
Trade names14 years$25.4 $(7.1)$18.3 $25.4 $(6.3)$19.1 
Customer relationships and contracts11 years87.6 (28.4)59.2 87.7 (21.6)66.1 
Channel sharing arrangements35 years12.6 (1.3)11.3 12.6 (1.1)11.5 
Other12 years4.1 (0.9)3.2 8.5 (3.3)5.2 
Total$129.7 $(37.7)$92.0 $134.2 $(32.3)$101.9 
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense
The Company estimates the annual amortization expense of amortizable intangible assets for the next five fiscal years will be as follows (in millions):
Estimated Amortization
2022$11.9 
20237.4 
20247.4 
20257.3 
20266.8 
Thereafter51.2 
Total$92.0