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Goodwill and Intangibles, Net - Changes in the Carrying Amount of Goodwill (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Goodwill [Roll Forward]    
Beginning balance $ 127.4 $ 111.0
Acquisitions   16.7
Translation (0.3) (0.3)
Ending balance 127.1 127.4
Infrastructure    
Goodwill [Roll Forward]    
Beginning balance 106.0 89.6
Acquisitions   16.7
Translation (0.3) (0.3)
Ending balance 105.7 106.0
Spectrum    
Goodwill [Roll Forward]    
Beginning balance 21.4 21.4
Acquisitions   0.0
Translation 0.0 0.0
Ending balance $ 21.4 $ 21.4